Author: "F Calaprice" - Searchworks@Jio Institute Digital Library Search Results

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93 results on '"F Calaprice"'

1. Borexino’s search for low-energy neutrinos associated with gravitational wave events from GWTC-3 database

Author: D. Basilico, G. Bellini, J. Benziger, R. Biondi, B. Caccianiga, F. Calaprice, A. Caminata, A. Chepurnov, D. D’Angelo, A. Derbin, A. Di Giacinto, V. Di Marcello, X. F. Ding, A. Di Ludovico, L. Di Noto, I. Drachnev, D. Franco, C. Galbiati, C. Ghiano, M. Giammarchi, A. Goretti, M. Gromov, D. Guffanti, Aldo Ianni, Andrea Ianni, A. Jany, V. Kobychev, G. Korga, S. Kumaran, M. Laubenstein, E. Litvinovich, P. Lombardi, I. Lomskaya, L. Ludhova, I. Machulin, J. Martyn, E. Meroni, L. Miramonti, M. Misiaszek, V. Muratova, R. Nugmanov, L. Oberauer, V. Orekhov, F. Ortica, M. Pallavicini, L. Pelicci, Ö. Penek, L. Pietrofaccia, N. Pilipenko, A. Pocar, G. Raikov, M. T. Ranalli, G. Ranucci, A. Re, N. Rossi, S. Schönert, D. Semenov, G. Settanta, M. Skorokhvatov, A. Singhal, O. Smirnov, A. Sotnikov, R. Tartaglia, G. Testera, E. Unzhakov, A. Vishneva, R. B. Vogelaar, F. von Feilitzsch, M. Wojcik, M. Wurm, S. Zavatarelli, K. Zuber, and G. Zuzel
Subjects: Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract: Abstract The search for neutrino events in correlation with gravitational wave (GW) events for three observing runs (O1, O2 and O3) from 09/2015 to 03/2020 has been performed using the Borexino data-set of the same period. We have searched for signals of neutrino-electron scattering and inverse beta-decay (IBD) within a time window of $$\pm \, 1000$$ ± 1000 s centered at the detection moment of a particular GW event. The search was done with three visible energy thresholds of 0.25, 0.8 and 3.0 MeV. Two types of incoming neutrino spectra were considered: the mono-energetic line and the supernova-like spectrum. GW candidates originated by merging binaries of black holes (BHBH), neutron stars (NSNS) and neutron star and black hole (NSBH) were analyzed separately. Additionally, the subset of most intensive BHBH mergers at closer distances and with larger radiative mass than the rest was considered. In total, follow-ups of 74 out of 93 gravitational waves reported in the GWTC-3 catalog were analyzed and no statistically significant excess over the background was observed. As a result, the strongest upper limits on GW-associated neutrino and antineutrino fluences for all flavors ( $$\nu _e, \nu _\mu , \nu _\tau $$ ν e , ν μ , ν τ ) at the level $$10^9{-}10^{15}~\textrm{cm}^{-2}\,\textrm{GW}^{-1}$$ 10 9 - 10 15 cm - 2 GW - 1 have been obtained in the 0.5–5 MeV neutrino energy range.
Published: 2023
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2. Search for low mass dark matter in DarkSide-50: the bayesian network approach

Author: P. Agnes, I. F. M. Albuquerque, T. Alexander, A. K. Alton, M. Ave, H. O. Back, G. Batignani, K. Biery, V. Bocci, W. M. Bonivento, B. Bottino, S. Bussino, M. Cadeddu, M. Cadoni, F. Calaprice, A. Caminata, M. D. Campos, N. Canci, M. Caravati, N. Cargioli, M. Cariello, M. Carlini, V. Cataudella, P. Cavalcante, S. Cavuoti, S. Chashin, A. Chepurnov, C. Cicalò, G. Covone, D. D’Angelo, S. Davini, A. De Candia, S. De Cecco, G. De Filippis, G. De Rosa, A. V. Derbin, A. Devoto, M. D’Incecco, C. Dionisi, F. Dordei, M. Downing, D. D’Urso, M. Fairbairn, G. Fiorillo, D. Franco, F. Gabriele, C. Galbiati, C. Ghiano, C. Giganti, G. K. Giovanetti, A. M. Goretti, G. Grilli di Cortona, A. Grobov, M. Gromov, M. Guan, M. Gulino, B. R. Hackett, K. Herner, T. Hessel, B. Hosseini, F. Hubaut, E. V. Hungerford, An. Ianni, V. Ippolito, K. Keeter, C. L. Kendziora, M. Kimura, I. Kochanek, D. Korablev, G. Korga, A. Kubankin, M. Kuss, M. La Commara, M. Lai, X. Li, M. Lissia, G. Longo, O. Lychagina, I. N. Machulin, L. P. Mapelli, S. M. Mari, J. Maricic, A. Messina, R. Milincic, J. Monroe, M. Morrocchi, X. Mougeot, V. N. Muratova, P. Musico, A. O. Nozdrina, A. Oleinik, F. Ortica, L. Pagani, M. Pallavicini, L. Pandola, E. Pantic, E. Paoloni, K. Pelczar, N. Pelliccia, S. Piacentini, A. Pocar, D. M. Poehlmann, S. Pordes, S. S. Poudel, P. Pralavorio, D. D. Price, F. Ragusa, M. Razeti, A. Razeto, A. L. Renshaw, M. Rescigno, J. Rode, A. Romani, D. Sablone, O. Samoylov, E. Sandford, W. Sands, S. Sanfilippo, C. Savarese, B. Schlitzer, D. A. Semenov, A. Shchagin, A. Sheshukov, M. D. Skorokhvatov, O. Smirnov, A. Sotnikov, S. Stracka, Y. Suvorov, R. Tartaglia, G. Testera, A. Tonazzo, E. V. Unzhakov, A. Vishneva, R. B. Vogelaar, M. Wada, H. Wang, Y. Wang, S. Westerdale, M. M. Wojcik, X. Xiao, C. Yang, G. Zuzel, and DarkSide-50 Collaboration
Subjects: Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract: Abstract We present a novel approach for the search of dark matter in the DarkSide-50 experiment, relying on Bayesian Networks. This method incorporates the detector response model into the likelihood function, explicitly maintaining the connection with the quantity of interest. No assumptions about the linearity of the problem or the shape of the probability distribution functions are required, and there is no need to morph signal and background spectra as a function of nuisance parameters. By expressing the problem in terms of Bayesian Networks, we have developed an inference algorithm based on a Markov Chain Monte Carlo to calculate the posterior probability. A clever description of the detector response model in terms of parametric matrices allows us to study the impact of systematic variations of any parameter on the final results. Our approach not only provides the desired information on the parameter of interest, but also potential constraints on the response model. Our results are consistent with recent published analyses and further refine the parameters of the detector response model.
Published: 2023
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3. Performance of the SABRE detector module in a purely passive shielding

Author: F. Calaprice, J. B. Benziger, S. Copello, I. Dafinei, D. D’Angelo, G. D’Imperio, G. Di Carlo, M. Diemoz, A. Di Giacinto, A. Di Ludovico, M. Ianna, A. Ianni, A. Mariani, S. Milana, D. Orlandi, V. Pettinacci, L. Pietrofaccia, S. Rahatlou, B. Suerfu, C. Tomei, C. Vignoli, and A. Zani
Subjects: Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract: Abstract We present here a characterization of the low background NaI(Tl) crystal NaI-33 based on a period of almost one year of data taking (891 kg $$\times $$ × days exposure) in a detector configuration with no use of organic scintillator veto. This remarkably radio-pure crystal already showed a low background in the SABRE Proof-of-Principle (PoP) detector, in the low energy region of interest (1–6 keV) for the search of dark matter interaction via the annual modulation signature. As the vetoable background components, such as $$^{40}$$ 40 K, are here sub-dominant, we reassembled the PoP setup with a fully passive shielding. We upgraded the selection of events based on a Boosted Decision Tree algorithm that rejects most of the PMT-induced noise while retaining scintillation signals with > 90% efficiency in 1–6 keV. We find an average background of 1.39 ± 0.02 counts/day/kg/keV in the region of interest and a spectrum consistent with data previously acquired in the PoP setup, where the external veto background suppression was in place. Our background model indicates that the dominant background component is due to decays of $$^{210}$$ 210 Pb, only partly residing in the crystal itself. The other location of $$^{210}$$ 210 Pb is the reflector foil that wraps the crystal. We now proceed to design the experimental setup for the physics phase of the SABRE North detector, based on an array of similar crystals, using a low radioactivity PTFE reflector and further improving the passive shielding strategy, in compliance with the new safety and environmental requirements of Laboratori Nazionali del Gran Sasso.
Published: 2022
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4. Search for low-energy signals from fast radio bursts with the Borexino detector

Author: S. Appel, Z. Bagdasarian, D. Basilico, G. Bellini, J. Benziger, R. Biondi, B. Caccianiga, F. Calaprice, A. Caminata, A. Chepurnov, D. D’Angelo, A. Derbin, A. Di Giacinto, V. Di Marcello, X. F. Ding, A. Di Ludovico, L. Di Noto, I. Drachnev, D. Franco, C. Galbiati, C. Ghiano, M. Giammarchi, A. Goretti, A. S. Göttel, M. Gromov, D. Guffanti, Aldo Ianni, Andrea Ianni, A. Jany, V. Kobychev, G. Korga, S. Kumaran, M. Laubenstein, E. Litvinovich, P. Lombardi, I. Lomskaya, L. Ludhova, G. Lukyanchenko, I. Machulin, J. Martyn, E. Meroni, L. Miramonti, M. Misiaszek, V. Muratova, R. Nugmanov, L. Oberauer, V. Orekhov, F. Ortica, M. Pallavicini, L. Pelicci, Ö. Penek, L. Pietrofaccia, N. Pilipenko, A. Pocar, G. Raikov, M. T. Ranalli, G. Ranucci, A. Razeto, A. Re, M. Redchuk, N. Rossi, S. Schönert, D. Semenov, G. Settanta, M. Skorokhvatov, A. Singhal, O. Smirnov, A. Sotnikov, R. Tartaglia, G. Testera, E. Unzhakov, A. Vishneva, R. B. Vogelaar, F. von Feilitzsch, M. Wojcik, M. Wurm, S. Zavatarelli, I. Zhutikov, K. Zuber, G. Zuzel, and Borexino Collaboration
Subjects: Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract: Abstract The search for neutrino events in correlation with 42 most intense fast radio bursts (FRBs) has been performed using the Borexino dataset from 05/2007 to 06/2021. We have searched for signals with visible energies above 250 keV within a time window of $$\pm \, 1000$$ ± 1000 s corresponding to detection time of a particular FRB. We also applied an alternative approach based on searching for specific shapes of neutrino-electron scattering spectra in the full exposure data of the Borexino detector. In particular, two incoming neutrino spectra were considered: the monoenergetic line and the spectrum expected from supernovae. The same spectra were considered for electron antineutrinos detected through inverse beta-decay reaction. No statistically significant excess over the background was observed. As a result, the strongest upper limits on FRB-associated neutrino fluences of all flavors have been obtained in the 0.5–50 MeV neutrino energy range.
Published: 2022
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5. Identification of the cosmogenic $$^{11}$$ 11 C background in large volumes of liquid scintillators with Borexino

Author: M. Agostini, K. Altenmüller, S. Appel, V. Atroshchenko, Z. Bagdasarian, D. Basilico, G. Bellini, J. Benziger, R. Biondi, D. Bravo, B. Caccianiga, F. Calaprice, A. Caminata, P. Cavalcante, A. Chepurnov, D. D’Angelo, S. Davini, A. Derbin, A. Di ZGiacintio, V. Di Marcello, X. F. Ding, A. Di Ludovico, L. Di Noto, I. Drachnev, A. Formozov, D. Franco, C. Galbiati, C. Ghiano, M. Giammarchi, A. Goretti, A. S. Göttel, M. Gromov, D. Guffanti, Aldo Ianni, Andrea Ianni, A. Jany, D. Jeschke, V. Kobychev, G. Korga, S. Kumaran, M. Laubenstein, E. Litvinovich, P. Lombardi, I. Lomskaya, L. Ludhova, G. Lukyanchenko, L. Lukyanchenko, I. Machulin, J. Martyn, E. Meroni, M. Meyer, L. Miramonti, M. Misiaszek, V. Muratova, B. Neumair, M. Nieslony, R. Nugmanov, L. Oberauer, V. Orekhov, F. Ortica, M. Pallavicini, L. Papp, L. Pelicci, Ö. Penek, L. Pietrofaccia, N. Pilipenko, A. Pocar, A. Porcelli, G. Raikov, M. T. Ranalli, G. Ranucci, A. Razeto, A. Re, M. Redchuk, A. Romani, N. Rossi, S. Schönert, D. Semenov, G. Settanta, M. Skorokhvatov, A. Singhal, O. Smirnov, A. Sotnikov, Y. Suvorov, R. Tartaglia, G. Testera, J. Thurn, E. Unzhakov, A. Vishneva, R. B. Vogelaar, F. von Feilitzsch, M. Wojcik, M. Wurm, S. Zavatarelli, K. Zuber, and G. Zuzel
Subjects: Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract: Abstract Cosmogenic radio-nuclei are an important source of background for low-energy neutrino experiments. In Borexino, cosmogenic $$^{11}$$ 11 C decays outnumber solar pep and CNO neutrino events by about ten to one. In order to extract the flux of these two neutrino species, a highly efficient identification of this background is mandatory. We present here the details of the most consolidated strategy, used throughout Borexino solar neutrino measurements. It hinges upon finding the space-time correlations between $$^{11}$$ 11 C decays, the preceding parent muons and the accompanying neutrons. This article describes the working principles and evaluates the performance of this Three-Fold Coincidence (TFC) technique in its two current implementations: a hard-cut and a likelihood-based approach. Both show stable performances throughout Borexino Phases II (2012–2016) and III (2016–2020) data sets, with a $$^{11}$$ 11 C tagging efficiency of $$\sim 90$$ ∼ 90 % and $$\sim $$ ∼ 63–66 % of the exposure surviving the tagging. We present also a novel technique that targets specifically $$^{11}$$ 11 C produced in high-multiplicity during major spallation events. Such $$^{11}$$ 11 C appear as a burst of events, whose space-time correlation can be exploited. Burst identification can be combined with the TFC to obtain about the same tagging efficiency of $$\sim 90\%$$ ∼ 90 % but with a higher fraction of the exposure surviving, in the range of $$\sim $$ ∼ 66–68 %.
Published: 2021
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6. Characterization of SABRE crystal NaI-33 with direct underground counting

Author: M. Antonello, I. J. Arnquist, E. Barberio, T. Baroncelli, J. Benziger, L. J. Bignell, I. Bolognino, F. Calaprice, S. Copello, I. Dafinei, D. D’Angelo, G. D’Imperio, M. D’Incecco, G. Di Carlo, M. Diemoz, A. Di Giacinto, A. Di Ludovico, W. Dix, A. R. Duffy, E. Hoppe, A. Ianni, M. Iannone, L. Ioannucci, S. Krishnan, G. J. Lane, I. Mahmood, A. Mariani, S. Milana, J. Mould, F. Nuti, D. Orlandi, V. Pettinacci, L. Pietrofaccia, S. Rahatlou, F. Scutti, M. Souza, A. E. Stuchbery, B. Suerfu, C. Tomei, P. Urquijo, C. Vignoli, A. Wallner, M. Wada, A. G. Williams, A. Zani, and M. Zurowski
Subjects: Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract: Abstract Ultra-pure NaI(Tl) crystals are the key element for a model-independent verification of the long standing DAMA result and a powerful means to search for the annual modulation signature of dark matter interactions. The SABRE collaboration has been developing cutting-edge techniques for the reduction of intrinsic backgrounds over several years. In this paper we report the first characterization of a 3.4 kg crystal, named NaI-33, performed in an underground passive shielding setup at LNGS. NaI-33 has a record low $$^{39}$$ 39 K contamination of 4.3 ± 0.2 ppb as determined by mass spectrometry. We measured a light yield of 11.1 ± 0.2 photoelectrons/keV and an energy resolution of 13.2% (FWHM/E) at 59.5 keV. We evaluated the activities of $$^{226}$$ 226 Ra and $$^{228}$$ 228 Th inside the crystal to be $$5.9\pm 0.6~\upmu $$ 5.9 ± 0.6 μ Bq/kg and $$1.6\pm 0.3~\upmu $$ 1.6 ± 0.3 μ Bq/kg, respectively, which would indicate a contamination from $$^{238}$$ 238 U and $$^{232}$$ 232 Th at part-per-trillion level. We measured an activity of 0.51 ± 0.02 mBq/kg due to $$^{210}$$ 210 Pb out of equilibrium and a $$\alpha $$ α quenching factor of 0.63 ± 0.01 at 5304 keV. We illustrate the analyses techniques developed to reject electronic noise in the lower part of the energy spectrum. A cut-based strategy and a multivariate approach indicated a rate, attributed to the intrinsic radioactivity of the crystal, of $$\sim $$ ∼ 1 count/day/kg/keV in the [5–20] keV region.
Published: 2021
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7. Constraints on flavor-diagonal non-standard neutrino interactions from Borexino Phase-II

Author: The Borexino collaboration, S. K. Agarwalla, M. Agostini, K. Altenmüller, S. Appel, V. Atroshchenko, Z. Bagdasarian, D. Basilico, G. Bellini, J. Benziger, D. Bick, G. Bonfini, D. Bravo, B. Caccianiga, F. Calaprice, A. Caminata, L. Cappelli, P. Cavalcante, F. Cavanna, A. Chepurnov, K. Choi, D. D’Angelo, S. Davini, A. Derbin, A. Di Giacinto, V. Di Marcello, X. F. Ding, A. Di Ludovico, L. Di Noto, I. Drachnev, K. Fomenko, A. Formozov, D. Franco, F. Gabriele, C. Galbiati, M. Gschwender, C. Ghiano, M. Giammarchi, A. Goretti, M. Gromov, D. Guffanti, C. Hagner, E. Hungerford, Aldo Ianni, Andrea Ianni, A. Jany, D. Jeschke, S. Kumaran, V. Kobychev, G. Korga, T. Lachenmaier, M. Laubenstein, E. Litvinovich, P. Lombardi, L. Ludhova, G. Lukyanchenko, L. Lukyanchenko, I. Machulin, G. Manuzio, S. Marcocci, J. Maricic, J. Martyn, E. Meroni, M. Meyer, L. Miramonti, M. Misiaszek, V. Muratova, B. Neumair, M. Nieslony, L. Oberauer, V. Orekhov, F. Ortica, M. Pallavicini, L. Papp, Ö. Penek, L. Pietrofaccia, N. Pilipenko, A. Pocar, G. Raikov, G. Ranucci, A. Razeto, A. Re, M. Redchuk, A. Romani, N. Rossi, S. Rottenanger, S. Schönert, D. Semenov, M. Skorokhvatov, O. Smirnov, A. Sotnikov, C. Sun, Y. Suvorov, T. Takeuchi, R. Tartaglia, G. Testera, J. Thurn, E. Unzhakov, A. Vishneva, R. B. Vogelaar, F. von Feilitzsch, M. Wojcik, M. Wurm, O. Zaimidoroga, S. Zavatarelli, K. Zuber, and G. Zuzel
Subjects: Neutrino Physics, Beyond Standard Model, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract: Abstract The Borexino detector measures solar neutrino fluxes via neutrino-electron elastic scattering. Observed spectra are determined by the solar-ν e survival probability P ee (E), and the chiral couplings of the neutrino and electron. Some theories of physics beyond the Standard Model postulate the existence of Non-Standard Interactions (NSI’s) which modify the chiral couplings and P ee (E). In this paper, we search for such NSI’s, in particular, flavor-diagonal neutral current interactions that modify the ν e e and ν τ e couplings using Borexino Phase II data. Standard Solar Model predictions of the solar neutrino fluxes for both high- and low-metallicity assumptions are considered. No indication of new physics is found at the level of sensitivity of the detector and constraints on the parameters of the NSI’s are placed. In addition, with the same dataset the value of sin2 θ W is obtained with a precision comparable to that achieved in reactor antineutrino experiments .
Published: 2020
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8. The SABRE project and the SABRE Proof-of-Principle

Author: M. Antonello, E. Barberio, T. Baroncelli, J. Benziger, L. J. Bignell, I. Bolognino, F. Calaprice, S. Copello, D. D’Angelo, G. D’Imperio, I. Dafinei, G. Di Carlo, M. Diemoz, A. Di Ludovico, W. Dix, A. R. Duffy, F. Froborg, G. K. Giovanetti, E. Hoppe, A. Ianni, L. Ioannucci, S. Krishnan, G. J. Lane, I. Mahmood, A. Mariani, M. Mastrodicasa, P. Montini, J. Mould, F. Nuti, D. Orlandi, M. Paris, V. Pettinacci, L. Pietrofaccia, D. Prokopovic, S. Rahatlou, N. Rossi, A. Sarbutt, E. Shields, M. J. Souza, A. E. Stuchbery, B. Suerfu, C. Tomei, V. Toso, P. Urquijo, C. Vignoli, M. Wada, A. Wallner, A. G. Williams, and J. Xu
Subjects: Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract: Abstract SABRE aims to directly measure the annual modulation of the dark matter interaction rate with NaI(Tl) crystals. A modulation compatible with the standard hypothesis, in which our Galaxy is immersed in a dark matter halo, has been measured by the DAMA experiment in the same target material. Other direct detection experiments, using different target materials, seem to exclude the interpretation of such modulation in the simplest scenario of WIMP-nucleon elastic scattering. The SABRE experiment aims to carry out an independent search with sufficient sensitivity to confirm or refute the DAMA claim. The goal of the SABRE experiment is to achieve the lowest background rate for a NaI(Tl) experiment (order of 0.1 cpd/kg/keVee in the energy region of interest for dark matter). This challenging goal could be achievable by operating high-purity crystals inside a liquid scintillator veto for active background rejection. In addition, twin detectors will be located in the northern and southern hemispheres to identify possible contributions to the modulation from seasonal or site-related effects. The SABRE project includes an initial Proof-of-Principle phase at LNGS (Italy), to assess the radio-purity of the crystals and the efficiency of the liquid scintillator veto. This paper describes the general concept of SABRE and the expected sensitivity to WIMP annual modulation.
Published: 2019
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9. Status and prospects of SABRE North

Author: Claudia Tomei, F. Calaprice, J. B. Benziger, S. Copello, I. Dafinei, D. D’Angelo, G. D’Imperio, G. Di Carlo, M. Diemoz, A. Di Giacinto, A. Di Ludovico, M. Ianna, A. Ianni, S. Milana, D. Orlandi, V. Pettinacci, L. Pietrofaccia, S. Rahatlou, B. Suerfu, C. Vignoli, and A. Zani
Published: 2023
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10. Study of antineutrinos from the Earth and the Cosmos with the Borexino detector

Author: Sandra Zavatarelli, M. Agostini, K. Altenmuller, S. Appel, V. Atroshchenko, Z. Bagdasarian, D. Basilico, G. Bellini, J. Benziger, R. Biondi, D. Bravo, B. Caccianiga, A. Caminata, F. Calaprice, P. Cavalcante, A. Chepurnov, D. D’Angelo, S. Davini, A. Derbin, A. Di Giacinto, V. Di Marcello, X.F. Ding, A. Di Ludovico, L. Di Noto, I. Drachnev, A. Formozov, D. Franco, C. Galbiati, C. Ghiano, M. Giammarchi, A. Goretti, A.S. Gottel, M. Gromov, D. Guffanti, Aldo Ianni, Andrea Ianni, A. Jany, D. Jeschke, V. Kobychev, G. Korga, S. Kumaran, M. Laubenstein, E. Litvinovich, P. Lombardi, I. Lomskaya, L. Ludhova, G. Lukyanchenko, L. Lukyanchenko, I. Machulin, J. Martyn, E. Meroni, M. Meyer, L. Miramonti, M. Misiaszek, V. Muratova, B. Neumair, M. Nieslony, R. Nugmanov, L. Oberauer, V. Orekhov, F. Ortica, M. Pallavicini, L. Papp, L. Pelicci, O Penek, L. Pietrofaccia, N. Pilipenko, A. Pocar, G. Raikov, M.T. Ranalli, G. Ranucci, A. Razeto, A. Re, M. Redchuk, A. Romani, N. Rossi, S. Schonert, D. Semenov, G. Settanta, M. Skorokhvatov, A. Singhal, O. Smirnov, A. Sotnikov, Y. Suvorov, R. Tartaglia, G. Testera, J. Thurn, E. Unzhakov, F. Villante, A. Vishneva, R.B. Vogelaar, F. von Feilitzsch, M. Wojcik, M. Wurm, S. Zavatarelli, K. Zuber, and G. Zuzel
Published: 2023
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11. First results from the DarkSide-50 dark matter experiment at Laboratori Nazionali del Gran Sasso

Author: P. Agnes, T. Alexander, A. Alton, K. Arisaka, H.O. Back, B. Baldin, K. Biery, G. Bonfini, M. Bossa, A. Brigatti, J. Brodsky, F. Budano, L. Cadonati, F. Calaprice, N. Canci, A. Candela, H. Cao, M. Cariello, P. Cavalcante, A. Chavarria, A. Chepurnov, A.G. Cocco, L. Crippa, D. D'Angelo, M. D'Incecco, S. Davini, M. De Deo, A. Derbin, A. Devoto, F. Di Eusanio, G. Di Pietro, E. Edkins, A. Empl, A. Fan, G. Fiorillo, K. Fomenko, G. Forster, D. Franco, F. Gabriele, C. Galbiati, A. Goretti, L. Grandi, M. Gromov, M.Y. Guan, Y. Guardincerri, B. Hackett, K. Herner, E.V. Hungerford, Al. Ianni, An. Ianni, C. Jollet, K. Keeter, C. Kendziora, S. Kidner, V. Kobychev, G. Koh, D. Korablev, G. Korga, A. Kurlej, P.X. Li, B. Loer, P. Lombardi, C. Love, L. Ludhova, S. Luitz, Y.Q. Ma, I. Machulin, A. Mandarano, S. Mari, J. Maricic, L. Marini, C.J. Martoff, A. Meregaglia, E. Meroni, P.D. Meyers, R. Milincic, D. Montanari, A. Monte, M. Montuschi, M.E. Monzani, P. Mosteiro, B. Mount, V. Muratova, P. Musico, A. Nelson, S. Odrowski, M. Okounkova, M. Orsini, F. Ortica, L. Pagani, M. Pallavicini, E. Pantic, L. Papp, S. Parmeggiano, R. Parsells, K. Pelczar, N. Pelliccia, S. Perasso, A. Pocar, S. Pordes, D. Pugachev, H. Qian, K. Randle, G. Ranucci, A. Razeto, B. Reinhold, A. Renshaw, A. Romani, B. Rossi, N. Rossi, S.D. Rountree, D. Sablone, P. Saggese, R. Saldanha, W. Sands, S. Sangiorgio, E. Segreto, D. Semenov, E. Shields, M. Skorokhvatov, O. Smirnov, A. Sotnikov, C. Stanford, Y. Suvorov, R. Tartaglia, J. Tatarowicz, G. Testera, A. Tonazzo, E. Unzhakov, R.B. Vogelaar, M. Wada, S. Walker, H. Wang, Y. Wang, A. Watson, S. Westerdale, M. Wojcik, A. Wright, X. Xiang, J. Xu, C.G. Yang, J. Yoo, S. Zavatarelli, A. Zec, C. Zhu, and G. Zuzel
Subjects: Physics, QC1-999
Abstract: We report the first results of DarkSide-50, a direct search for dark matter operating in the underground Laboratori Nazionali del Gran Sasso (LNGS) and searching for the rare nuclear recoils possibly induced by weakly interacting massive particles (WIMPs). The dark matter detector is a Liquid Argon Time Projection Chamber with a (46.4±0.7) kg active mass, operated inside a 30 t organic liquid scintillator neutron veto, which is in turn installed at the center of a 1 kt water Cherenkov veto for the residual flux of cosmic rays. We report here the null results of a dark matter search for a (1422±67) kgd exposure with an atmospheric argon fill. This is the most sensitive dark matter search performed with an argon target, corresponding to a 90% CL upper limit on the WIMP-nucleon spin-independent cross section of 6.1×10−44 cm2 for a WIMP mass of 100 Gev/c2. Keywords: Dark matter, WIMP, Noble liquid detectors, Low-background detectors, Liquid scintillators
Published: 2015
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12. Solar neutrino physics with Borexino

Author: Andrea Pocar, M. Agostini, K. Altenmüller, S. Appel, V. Atroshchenko, Z. Bagdasarian, D. Basilico, G. Bellini, J. Benziger, G. Bonfini, D. Bravo, B. Caccianiga, F. Calaprice, A. Caminata, L. Cappelli, S. Caprioli, M. Carlini, P. Cavalcante, F. Cavanna, A. Chepurnov, K. Choi, L. Collica, D. D’Angelo, S. Davini, A. Derbin, X. F. Ding, A. Di Ludovico, L. Di Noto, I. Drachnev, K. Fomenko, A. Formozov, D. Franco, F. Gabriele, C. Galbiati, M. Gschwender, C. Ghiano, M. Giammarchi, A. Goretti, M. Gromov, D. Guffanti, T. Houdy, E. Hungerford, Aldo Ianni, Andrea Ianni, A. Jany, D. Jeschke, S. Kumaran, V. Kobychev, G. Korga, T. Lachenmaier, M. Laubenstein, E. Litvinovich, P. Lombardi, L. Ludhova, G. Lukyanchenko, L. Lukyanchenko, I. Machulin, G. Manuzio, S. Marcocci, J. Maricic, J. Martyn, E. Meroni, M. Meyer, L. Miramonti, M. Misiaszek, V. Muratova, B. Neumair, M. Nieslony, L. Oberauer, V. Orekhov, F. Ortica, M. Pallavicini, L. Papp, Ö. Penek, L. Pietrofaccia, N. Pilipenko, A. Porcelli, G. Raikov, G. Ranucci, A. Razeto, A. Re, M. Redchuk, A. Romani, N. Rossi, S. Rottenanger, S. Schönert, D. Semenov, M. Skorokhvatov, O. Smirnov, A. Sotnikov, L. F. F. Stokes, Y. Suvorov , R. Tartaglia, G. Testera, J. Thurn, E. Unzhakov, A. Vishneva, R. B. Vogelaar, F. von Feilitzsch, S. Weinz, M. Wojcik, M. Wurm, O. Zaimidoroga, S. Zavatarelli, K. Zuber, G. Zuzel
Subjects: Physics, QC1-999
Abstract: We present the most recent solar neutrino results from the Borexino experiment at the Gran Sasso underground laboratory. In particular, refined measurements of all neutrinos produced in the {\it pp} fusion chain have been made. It is the first time that the same detector measures the entire range of solar neutrinos at once. These new data weakly favor a high-metallicity Sun. Prospects for measuring CNO solar neutrinos are also discussed.
Published: 2019
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13. The SABRE experiment

Author: A. Zani, D. D’Angelo, C. Vignoli, G. Di Carlo, A. Di Giacinto, A. Ianni, D. Orlandi, A. Mariani, S. Copello, C. Tomei, I. Dafinei, G. D’Imperio, M. Diemoz, M. Iannone, S. Milana, V. Pettinacci, S. Rahatlou, F. Calaprice, A. Di Ludovico, W. Peloso, L. Pietrofaccia, M. Souza, B. Suerfu, M. Wada, and J. Benziger
Subjects: Nuclear and High Energy Physics, Astronomy and Astrophysics, Atomic and Molecular Physics, and Optics
Abstract: The dark matter interpretation of the DAMA/LIBRA annual modulation signal represents a long-standing open question in astroparticle physics. The SABRE experiment aims to test such claim, bringing the same detection technique to an unprecedented sensitivity. Based on ultra-low background NaI(Tl) scintillating crystals like DAMA, SABRE features a liquid scintillator Veto system, surrounding the main target, and it will deploy twin detectors: one in the Northern hemisphere at Laboratori Nazionali del Gran Sasso (LNGS), Italy and the other in the Stawell Underground Physics Laboratory (SUPL), Australia, first laboratory of this kind in the Southern hemisphere. The first very-high-purity crystal produced by the collaboration was shipped to LNGS in 2019 for characterization. It features a potassium contamination, measured by mass spectroscopy, of the order of 4 ppb, about three times lower than DAMA/LIBRA crystals. The first phase of the SABRE experiment is a Proof-of-Principle (PoP) detector featuring one crystal and a liquid scintillator Veto, at LNGS. This contribution will present the results of the stand-alone characterization of the first SABRE high-purity crystal, as well as the status of the PoP detector, commissioned early in the summer of 2020.
Published: 2022
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14. Investigation of the cryogenic scintillation of pure and doped sodium-iodine

Author: M. Clark, F. Froborg, P.C.F. Di Stefano, and F. Calaprice
Subjects: Physics - Instrumentation and Detectors, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), Instrumentation, Mathematical Physics
Abstract: We have studied the scintillation of pure and doped sodium iodide crystals handled in low humidity conditions under external $\alpha$ and $\gamma$ excitation from room temperature down to 4K. The light yield of pure sodium iodide was seen to increase at low temperatures by a factor 30 compared to room temperature, up to a maximum of 40 photons/keV under $\gamma$ excitation at 60K, stabilizing to 30 photons/keV at lower temperatures. Thallium doped sodium iodide fluctuates by 20% around the room temperature value, stabilizing at 40 photons/keV at low temperature. $\alpha / \gamma$ quenching factor stabilizes at roughly 0.7 for both materials beneath 50K. Time constants of both materials slow greatly at low temperature, reaching tens of microseconds. Cryogenic applications of these materials are complexified by their mechanical fragility and hygroscopicity., Comment: 16 pages, 8 figures
Published: 2021

15. The DarkSide Multiton Detector for the Direct Dark Matter Search

Author: C. E. Aalseth, P. Agnes, A. Alton, K. Arisaka, D. M. Asner, H. O. Back, B. Baldin, K. Biery, G. Bonfini, M. Bossa, A. Brigatti, J. Brodsky, F. Budano, L. Cadonati, M. Cadoni, F. Calaprice, N. Canci, A. Candela, H. Cao, M. Cariello, P. Cavalcante, A. Chepurnov, A. G. Cocco, C. Condon, L. Crippa, D. D’Angelo, M. D’Incecco, S. Davini, M. De Deo, A. Derbin, A. Devoto, F. Di Eusanio, E. Edkins, A. Empl, A. Fan, G. Fiorillo, K. Fomenko, G. Forster, M. Foxe, D. Franco, F. Gabriele, C. Galbiati, A. Goretti, L. Grandi, M. Gromov, M. Y. Guan, Y. Guardincerri, B. Hackett, K. Herner, A. Hime, P. Humble, E. Hungerford, Al. Ianni, An. Ianni, D. E. Jaffe, C. Jollet, K. Keeter, C. Kendziora, S. Kidner, V. Kobychev, G. Koh, D. Korablev, G. Korga, A. Kurlej, P. X. Li, M. Lissia, P. Lombardi, L. Ludhova, S. Luitz, G. Lukyachenko, Y. Q. Ma, I. Machulin, A. Mandarano, S. M. Mari, J. Maricic, L. Marini, D. Markov, J. Martoff, A. Meregaglia, E. Meroni, P. D. Meyers, T. Miletic, R. Milincic, M. Montuschi, M. E. Monzani, P. Mosteiro, B. Mount, V. Muratova, P. Musico, D. Montanari, A. Nelson, S. Odrowski, A. Odrzywolek, J. L. Orrell, M. Orsini, F. Ortica, L. Pagani, M. Pallavicini, E. Pantic, S. Parmeggiano, B. Parsells, K. Pelczar, N. Pelliccia, S. Perasso, L. Perasso, A. Pocar, S. Pordes, D. Pugachev, H. Qian, K. Randle, G. Ranucci, A. Razeto, K. Recine, B. Reinhold, A. Renshaw, A. Romani, N. Rossi, B. Rossi, S. D. Rountree, D. Sablone, P. Saggese, R. Saldanha, W. Sands, S. Sangiorgio, E. Segreto, D. Semenov, E. Shields, M. Skorokhvatov, M. Smallcomb, O. Smirnov, A. Sotnikov, Y. Suvurov, R. Tartaglia, J. Tatarowicz, G. Testera, A. Tonazzo, E. Unzhakov, R. B. Vogelaar, M. Wada, S. E. Walker, H. Wang, Y. Wang, A. W. Watson, S. Westerdale, R. Williams, M. Wojcik, J. Xu, C. G. Yang, J. Yoo, B. Yu, S. Zavatarelli, W. L. Zhong, and G. Zuzel
Subjects: Physics, QC1-999
Abstract: Although the existence of dark matter is supported by many evidences, based on astrophysical measurements, its nature is still completely unknown. One major candidate is represented by weakly interacting massive particles (WIMPs), which could in principle be detected through their collisions with ordinary nuclei in a sensitive target, producing observable low-energy (
Published: 2015
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16. A study of events with photoelectric emission in the DarkSide-50 liquid argon Time Projection Chamber

Author: P. Agnes, I.F.M. Albuquerque, T. Alexander, A.K. Alton, M. Ave, H.O. Back, G. Batignani, K. Biery, V. Bocci, W.M. Bonivento, B. Bottino, S. Bussino, M. Cadeddu, M. Cadoni, F. Calaprice, A. Caminata, N. Canci, M. Caravati, N. Cargioli, M. Cariello, M. Carlini, M. Carpinelli, S. Catalanotti, V. Cataudella, P. Cavalcante, S. Cavuoti, A. Chepurnov, C. Cicalò, A.G. Cocco, G. Covone, D. D’Angelo, S. Davini, A. De Candia, S. De Cecco, G. De Filippis, G. De Rosa, A.V. Derbin, A. Devoto, M. D’Incecco, C. Dionisi, F. Dordei, M. Downing, D. D’Urso, G. Fiorillo, D. Franco, F. Gabriele, C. Galbiati, C. Ghiano, C. Giganti, G.K. Giovanetti, O. Gorchakov, A.M. Goretti, A. Grobov, M. Gromov, M. Guan, Y. Guardincerri, M. Gulino, B.R. Hackett, K. Herner, B. Hosseini, F. Hubaut, E.V. Hungerford, An. Ianni, V. Ippolito, K. Keeter, C.L. Kendziora, I. Kochanek, D. Korablev, G. Korga, A. Kubankin, M. Kuss, M. La Commara, M. Lai, X. Li, M. Lissia, G. Longo, I.N. Machulin, L.P. Mapelli, S.M. Mari, J. Maricic, C.J. Martoff, A. Messina, P.D. Meyers, R. Milincic, M. Morrocchi, V.N. Muratova, P. Musico, A. Navrer Agasson, A.O. Nozdrina, A. Oleinik, F. Ortica, L. Pagani, M. Pallavicini, L. Pandola, E. Pantic, E. Paoloni, K. Pelczar, N. Pelliccia, E. Picciau, A. Pocar, S. Pordes, S.S. Poudel, P. Pralavorio, F. Ragusa, M. Razeti, A. Razeto, A.L. Renshaw, M. Rescigno, J. Rode, A. Romani, D. Sablone, O. Samoylov, W. Sands, S. Sanfilippo, C. Savarese, B. Schlitzer, D.A. Semenov, A. Shchagin, A. Sheshukov, M.D. Skorokhvatov, O. Smirnov, A. Sotnikov, S. Stracka, Y. Suvorov, R. Tartaglia, G. Testera, A. Tonazzo, E.V. Unzhakov, A. Vishneva, R.B. Vogelaar, M. Wada, H. Wang, Y. Wang, S. Westerdale, Ma.M. Wojcik, X. Xiao, C. Yang, G. Zuzel, AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE (UMR_7585)), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), DarkSide-50, Agnes, P., Albuquerque, I. F. M., Alexander, T., Alton, A. K., Ave, M., Back, H. O., Batignani, G., Biery, K., Bocci, V., Bonivento, W. M., Bottino, B., Bussino, S., Cadeddu, M., Cadoni, M., Calaprice, F., Caminata, A., Canci, N., Caravati, M., Cargioli, N., Cariello, M., Carlini, M., Carpinelli, M., Catalanotti, S., Cataudella, V., Cavalcante, P., Cavuoti, S., Chepurnov, A., Cical??, C., Cocco, A. G., Covone, G., D???angelo, D., Davini, S., De Candia, A., De Cecco, S., De Filippis, G., De Rosa, G., Derbin, A. V., Devoto, A., D???incecco, M., Dionisi, C., Dordei, F., Downing, M., D???urso, D., Fiorillo, G., Franco, D., Gabriele, F., Galbiati, C., Ghiano, C., Giganti, C., Giovanetti, G. K., Gorchakov, O., Goretti, A. M., Grobov, A., Gromov, M., Guan, M., Guardincerri, Y., Gulino, M., Hackett, B. R., Herner, K., Hosseini, B., Hubaut, F., Hungerford, E. V., Ianni, An., Ippolito, V., Keeter, K., Kendziora, C. L., Kochanek, I., Korablev, D., Korga, G., Kubankin, A., Kuss, M., La Commara, M., Lai, M., Li, X., Lissia, M., Longo, G., Machulin, I. N., Mapelli, L. P., Mari, S. M., Maricic, J., Martoff, C. J., Messina, A., Meyers, P. D., Milincic, R., Morrocchi, M., Muratova, V. N., Musico, P., Navrer Agasson, A., Nozdrina, A. O., Oleinik, A., Ortica, F., Pagani, L., Pallavicini, M., Pandola, L., Pantic, E., Paoloni, E., Pelczar, K., Pelliccia, N., Picciau, E., Pocar, A., Pordes, S., Poudel, S. S., Pralavorio, P., Ragusa, F., Razeti, M., Razeto, A., Renshaw, A. L., Rescigno, M., Rode, J., Romani, A., Sablone, D., Samoylov, O., Sands, W., Sanfilippo, S., Savarese, C., Schlitzer, B., Semenov, D. A., Shchagin, A., Sheshukov, A., Skorokhvatov, M. D., Smirnov, O., Sotnikov, A., Stracka, S., Suvorov, Y., Tartaglia, R., Testera, G., Tonazzo, A., Unzhakov, E. V., Vishneva, A., Vogelaar, R. B., Wada, M., Wang, H., Wang, Y., Westerdale, S., Wojcik, Ma. M., Xiao, X., Yang, C., Zuzel, G., Cicalò, C., D’Angelo, D., D’Incecco, M., D’Urso, D., Agasson, A. Navrer, Agnes, P, Albuquerque, I, Alexander, T, Alton, A, Ave, M, Back, H, Batignani, G, Biery, K, Bocci, V, Bonivento, W, Bottino, B, Bussino, S, Cadeddu, M, Cadoni, M, Calaprice, F, Caminata, A, Canci, N, Caravati, M, Cargioli, N, Cariello, M, Carlini, M, Carpinelli, M, Catalanotti, S, Cataudella, V, Cavalcante, P, Cavuoti, S, Chepurnov, A, Cicalo, C, Cocco, A, Covone, G, D'Angelo, D, Davini, S, De Candia, A, De Cecco, S, De Filippis, G, De Rosa, G, Derbin, A, Devoto, A, D'Incecco, M, Dionisi, C, Dordei, F, Downing, M, D'Urso, D, Fiorillo, G, Franco, D, Gabriele, F, Galbiati, C, Ghiano, C, Giganti, C, Giovanetti, G, Gorchakov, O, Goretti, A, Grobov, A, Gromov, M, Guan, M, Guardincerri, Y, Gulino, M, Hackett, B, Herner, K, Hosseini, B, Hubaut, F, Hungerford, E, Ianni, A, Ippolito, V, Keeter, K, Kendziora, C, Kochanek, I, Korablev, D, Korga, G, Kubankin, A, Kuss, M, La Commara, M, Lai, M, Li, X, Lissia, M, Longo, G, Machulin, I, Mapelli, L, Mari, S, Maricic, J, Martoff, C, Messina, A, Meyers, P, Milincic, R, Morrocchi, M, Muratova, V, Musico, P, Agasson, A, Nozdrina, A, Oleinik, A, Ortica, F, Pagani, L, Pallavicini, M, Pandola, L, Pantic, E, Paoloni, E, Pelczar, K, Pelliccia, N, Picciau, E, Pocar, A, Pordes, S, Poudel, S, Pralavorio, P, Ragusa, F, Razeti, M, Razeto, A, Renshaw, A, Rescigno, M, Rode, J, Romani, A, Sablone, D, Samoylov, O, Sands, W, Sanfilippo, S, Savarese, C, Schlitzer, B, Semenov, D, Shchagin, A, Sheshukov, A, Skorokhvatov, M, Smirnov, O, Sotnikov, A, Stracka, S, Suvorov, Y, Tartaglia, R, Testera, G, Tonazzo, A, Unzhakov, E, Vishneva, A, Vogelaar, R, Wada, M, Wang, H, Wang, Y, Westerdale, S, Wojcik, M, Xiao, X, Yang, C, and Zuzel, G
Subjects: dark matter: interaction, Physics - Instrumentation and Detectors, Dark matter Liquid argon Underground argon, Physics::Instrumentation and Detectors, photoelectron: emission, FOS: Physical sciences, Astronomy and Astrophysics, Instrumentation and Detectors (physics.ins-det), dark matter: detector, electrode, time projection chamber: liquid argon, sensitivity, dark matter, liquid argon, High Energy Physics - Experiment, efficiency: quantum, High Energy Physics - Experiment (hep-ex), Underground argon, Dark matter, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], upgrade, Liquid argon, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], underground argon, photoelectron: yield
Abstract: Finding unequivocal evidence of dark matter interactions in a particle detector is a major objective of physics research. Liquid argon time projection chambers offer a path to probe Weakly Interacting Massive Particles scattering cross sections on nucleus down to the so-called neutrino floor, in a mass range from few GeV's to hundredths of TeV's. Based on the successful operation of the DarkSide-50 detector at LNGS, a new and more sensitive experiment, DarkSide-20k, has been designed and is now under construction. A thorough understanding of the DarkSide-50 detector response and, therefore, of all kind of observed events, is essential for an optimal design of the new experiment. In this paper, we report on a particular set of events, which were not used for dark matter searches. Namely, standard two-pulse scintillation-ionization signals accompanied by a small amplitude third pulse, originating from single or few electrons, in a time window of less than a maximum drift time. We compare our findings to those of a recent paper of the LUX Collaboration (D.S.Akerib et al. Phys.Rev.D 102, 092004). Indeed, both experiments observe events related to photoionization of the cathode. From the measured rate of these events, we estimate for the first time the quantum efficiency of the tetraphenyl butadiene deposited on the DarkSide-50 cathode at wavelengths around 128 nm, in liquid argon. Also, both experiments observe events likely related to photoionization of impurities in the liquid. The probability of photoelectron emission per unit length turns out to be one order of magnitude smaller in DarkSide-50 than in LUX. This result, together with the much larger measured electron lifetime, coherently hints toward a lower concentration of contaminants in DarkSide-50 than in LUX., 10 pages, 8 figures, 1 table
Published: 2021
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17. Solar and geoneutrinos

Author: L Ludhova, M Agostini, K Altenmüller, S Appel, V Atroshchenko, Z Bagdasarian, D Basilico, G Bellini, J Benziger, R Biondi, D Bravo, B Caccianiga, F Calaprice, A Caminata, P Cavalcante, A Chepurnov, D D’Angelo, S Davini, A Derbin, A Di Giacinto, V Di Marcello, X.F Ding, A Di Ludovico, L Di Noto, I Drachnev, A Formozov, D Franco, C Galbiati, C Ghiano, M Giammarchi, A Goretti, A.S Göttel, M Gromov, D Guffanti, Aldo Ianni, Andrea Ianni, A Jany, D Jeschke, V Kobychev, G Korga, S Kumaran, M Laubenstein, E Litvinovich, P Lombardi, I Lomskaya, G Lukyanchenko, L Lukyanchenko, I Machulin, J Martyn, E Meroni, M Meyer, L Miramonti, M Misiaszek, V Muratova, B Neumair, M Nieslony, R Nugmanov, L Oberauer, V Orekhov, F Ortica, M Pallavicini, L Papp, L Pelicci, Ö Penek, L Pietrofaccia, N Pilipenko, A Pocar, G Raikov, M.T Ranalli, G Ranucci, A Razeto, A Re, M Redchuk, A Romani, N Rossi, S Schönert, D Semenov, G Settanta, M Skorokhvatov, A Singhal, O Smirnov, A Sotnikov, Y Suvorov, R Tartaglia, G Testera, J Thurn, E Unzhakov, F Villante, A Vishneva, R.B Vogelaar, F von Feilitzsch, M Wojcik, M Wurm, S Zavatarelli, K Zuber, G Zuzel, AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), and Borexino
Subjects: History, neutrino: solar, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, High Energy Physics::Phenomenology, ddc:530, High Energy Physics::Experiment, neutrino: geophysics, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], ddc, Physics::Geophysics, Computer Science Applications, Education
Abstract: Thanks to the progress of neutrino physics, today we are able of exploiting neutrinos as a tool to study astrophysical objects. The latter in turn serve as unique sources of elusive neutrinos, which fundamental properties are still to be understood. This contribution attempts to summarize the latest results obtained by measuring neutrinos emitted from the Sun and geoneutrinos produced in radioactive decays inside the Earth, with a particular focus on a recent discovery of the CNO-cycle solar neutrinos by Borexino. Comprehensive measurement of the pp-chain solar neutrinos and the first directional detection of sub-MeV solar neutrinos by Borexino, the updated 8B solar neutrino results of Super-Kamiokande, as well as the latest Borexino and KamLAND geoneutrino measurements are also discussed.
Published: 2021
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18. First Cherenkov directional detection of sub-MeV solar neutrinos in Borexino

Author: Johann Martyn, M. Agostini, K. Altenmüller, S. Appel, V. Atroshchenko, Z. Bagdasarian, D. Basilico, G. Bellini, J. Benziger, R. Biondi, D. Bravo, B. Caccianiga, F. Calaprice, A. Caminata, P. Cavalcante, A. Chepurnov, D. D’Angelo, S. Davini, A. Derbin, A. Di Giacinto, V. Di Marcello, X.F. Ding, A. Di Ludovico, L. Di Noto, I. Drachnev, A. Formozov, D. Franco, C. Galbiati, C. Ghiano, M. Giammarchi, A. Goretti, A.S. Göttel, M. Gromov, D. Guffanti, null Aldo Ianni, null Andrea Ianni, A. Jany, D. Jeschke, V. Kobychev, G. Korga, S. Kumaran, M. Laubenstein, E. Litvinovich, P. Lombardi, I. Lomskaya, L. Ludhova, G. Lukyanchenko, L. Lukyanchenko, I. Machulin, J. Martyn, E. Meroni, M. Meyer, L. Miramonti, M. Misiaszek, V. Muratova, B. Neumair, M. Nieslony, R. Nugmanov, L. Oberauer, V. Orekhov, F. Ortica, M. Pallavicini, L. Papp, L. Pelicci, Ö. Penek, L. Pietrofaccia, N. Pilipenko, A. Pocar, G. Raikov, M.T. Ranalli, G. Ranucci, A. Razeto, A. Re, M. Redchuk, A. Romani, N. Rossi, S. Schönert, D. Semenov, G. Settanta, M. Skorokhvatov, A. Singhal, O. Smirnov, A. Sotnikov, Y. Suvorov, R. Tartaglia, G. Testera, J. Thurn, E. Unzhakov, A. Vishneva, R.B. Vogelaar, F. von Feilitzsch, M. Wojcik, B. Wonsak, M. Wurm, S. Zavatarelli, K. Zuber, and G. Zuzel
Subjects: Computer Science::Machine Learning, History, Physics::Instrumentation and Detectors, Computer Science::Mathematical Software, Computer Science::Digital Libraries, Computer Science Applications, Education
Abstract: Borexino is a 280t liquid scintillator detector at the Laboratori Nazionali del Gran Sasso (LNGS), Italy. Its main goal is the precision spectroscopy of solar neutrinos down to energies of 0.19 MeV and for this task it features an unprecedented radio-purity and a high scintillation light yield. The solar neutrinos are measured by the elastic scattering off electrons which induce isotropically emitted scintillation photons as well as a sub-dominant number of Cherenkov photons that are detected by photomulitplier tubes. Here we present the first detection of sub-MeV solar neutrinos using their associated Cherenkov photons in a high light yield liquid scintillator detector. In Borexino electrons with E>0.16MeV produce Cherenkov photons, where the ratio of Cherenkov photons from the neutrino scattered electrons is estimated to be < 1% for all PMT hits, so a typical event by event direction reconstruction is not possible. Instead this analysis looks at the integrated signal of the PMT hits of all detected events by correlating the position of each hit PMT relative to the reconstructed position of the event and the well known position of the Sun. In this way it is possible to measure an angular distribution that shows the statistical contribution of Cherenkov photons from the solar neutrino recoil electrons. Using the Geant4-based Borexino Monte Carlo to produce the expected angular distribution for solar neutrinos and background we have measured 8643 − 2058 +2252 neutrino events out of 19904 total events for an energy region around the 7Be edge between 0.53 MeV and 0.74 MeV.
Published: 2021
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19. Observation of CNO cycle solar neutrinos in Borexino

Author: Ö Penek, M Agostini, K Altenmüller, S Appel, V Atroshchenko, Z Bagdasarian, D Basilico, G Bellini, J Benziger, R Biondi, D Bravo, B Caccianiga, F Calaprice, A Caminata, P Cavalcante, A Chepurnov, D D’Angelo, S Davini, A Derbin, A Di Giacinto, V Di Marcello, X.F Ding, A Di Ludovico, L Di Noto, I Drachnev, A Formozov, D Franco, C Galbiati, C Ghiano, M Giammarchi, A Goretti, A.S Göttel, M Gromov, D Guffanti, Aldo Ianni, Andrea Ianni, A Jany, D Jeschke, V Kobychev, G Korga, S Kumaran, M Laubenstein, E Litvinovich, P Lombardi, I Lomskaya, L Ludhova, G Lukyanchenko, L Lukyanchenko, I Machulin, J Martyn, E Meroni, M Meyer, L Miramonti, M Misiaszek, V Muratova, B Neumair, M Nieslony, R Nugmanov, L Oberauer, V Orekhov, F Ortica, M Pallavicini, L Papp, L Pelicci, L Pietrofaccia, N Pilipenko, A Pocar, G Raikov, M.T Ranalli, G Ranucci, A Razeto, A Re, M Redchuk, A Romani, N Rossi, S Schønert, D Semenov, G Settanta, M Skorokhvatov, A Singhal, O Smirnov, A Sotnikov, Y Suvorov, R Tartaglia, G Testera, J Thurn, E Unzhakov, F Villante, A Vishneva, R.B Vogelaar, F von Feilitzsch, M Wojcik, M Wurm, S Zavatarelli, K Zuber, and G Zuzel
Subjects: History, Physics::Instrumentation and Detectors, Astrophysics::Solar and Stellar Astrophysics, ddc:530, High Energy Physics::Experiment, Computer Science Applications, Education
Abstract: The Borexino detector, located at the Laboratori Nazionali del Gran Sasso in Italy, is a radiopure 280 ton liquid scintillator detector with a primary goal to measure low-energy solar neutrinos created in the core of the Sun. These neutrinos are a consequence of nuclear fusion reactions in the solar core where Hydrogen is burned into Helium and provide a direct probe of the energy production processes, namely the proton-proton (pp) chain and the Carbon-Nitrogen-Oxygen (CNO) cycle. The fusion of Hydrogen in the case of the CNO cycle, which is expected to contribute in the order of less than 1% to the total solar energy, is catalyzed by Carbon, Nitrogen, and Oxygen directly depending on the abundances of these elements in the solar core. The measurement of CNO neutrinos is challenging due to the high spectral correlation with the decay electrons of the background isotope 210Bi and the pep solar neutrino signal. The experimental achievement of thermal stabilization of the Borexino detector after mid 2016, has opened the possibility to develop a method to constrain the 210Bi rate through its decay daughter and α emitter 210Po which can be identified in Borexino with an efficiency close to 100 percent on an event-by-event basis. Moreover, the flux of pep neutrinos can be constrained precisely through a global analysis of solar neutrino data which is independent of the dataset used for the CNO analysis. This conference contribution is dedicated to the first experimental evidence of neutrinos produced in the CNO fusion cycle in the Sun which is at the same time the dominant energy production mechanism in heavier stars compared to the Sun.
Published: 2021
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20. Characterization of SABRE crystal NaI-33 with direct underground counting

Author: Andrea Zani, S. Milana, A. Di Ludovico, C. Vignoli, Marcella Diemoz, Andrew Stuchbery, I. J. Arnquist, A. Di Giacinto, T. Baroncelli, Giulia D'imperio, F. Calaprice, Federico Scutti, D. D'Angelo, Jeremy Mould, M. Wada, G. Di Carlo, Anton Wallner, Elisabetta Luigia Barberio, Michael Souza, L. Pietrofaccia, Lindsey J. Bignell, Shahram Rahatlou, Gregory Lane, Anthony G. Williams, M. Zurowski, Andrea Mariani, D. Orlandi, S. Copello, M. Antonello, Eric W. Hoppe, Francesco Nuti, V. Pettinacci, I. Bolognino, I. Mahmood, Alan R. Duffy, Claudia Tomei, L. Ioannucci, P. Urquijo, M. Iannone, Ioan Dafinei, B. Suerfu, Aldo Ianni, S. Krishnan, W. Dix, J. Benziger, and M. D'Incecco
Subjects: Physics - Instrumentation and Detectors, Physics and Astronomy (miscellaneous), Analytical chemistry, FOS: Physical sciences, lcsh:Astrophysics, 01 natural sciences, Atomic, Crystal, Particle and Plasma Physics, 0103 physical sciences, Energy spectrum, lcsh:QB460-466, lcsh:Nuclear and particle physics. Atomic energy. Radioactivity, Nuclear, 010306 general physics, Engineering (miscellaneous), physics.ins-det, Physics, Quantum Physics, 010308 nuclear & particles physics, Molecular, Instrumentation and Detectors (physics.ins-det), Nuclear & Particles Physics, Full width at half maximum, 13. Climate action, lcsh:QC770-798, Energy (signal processing)
Abstract: Ultra-pure NaI(Tl) crystals are the key element for a model-independent verification of the long standing DAMA result and a powerful means to search for the annual modulation signature of dark matter interactions. The SABRE collaboration has been developing cutting-edge techniques for the reduction of intrinsic backgrounds over several years. In this paper we report the first characterization of a 3.4 kg crystal, named NaI-33, performed in an underground passive shielding setup at LNGS. NaI-33 has a record low $$^{39}$$ 39 K contamination of 4.3 ± 0.2 ppb as determined by mass spectrometry. We measured a light yield of 11.1 ± 0.2 photoelectrons/keV and an energy resolution of 13.2% (FWHM/E) at 59.5 keV. We evaluated the activities of $$^{226}$$ 226 Ra and $$^{228}$$ 228 Th inside the crystal to be $$5.9\pm 0.6~\upmu $$ 5.9 ± 0.6 μ Bq/kg and $$1.6\pm 0.3~\upmu $$ 1.6 ± 0.3 μ Bq/kg, respectively, which would indicate a contamination from $$^{238}$$ 238 U and $$^{232}$$ 232 Th at part-per-trillion level. We measured an activity of 0.51 ± 0.02 mBq/kg due to $$^{210}$$ 210 Pb out of equilibrium and a $$\alpha $$ α quenching factor of 0.63 ± 0.01 at 5304 keV. We illustrate the analyses techniques developed to reject electronic noise in the lower part of the energy spectrum. A cut-based strategy and a multivariate approach indicated a rate, attributed to the intrinsic radioactivity of the crystal, of $$\sim $$ ∼ 1 count/day/kg/keV in the [5–20] keV region.
Published: 2020
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21. Ten years of cosmic muons observation with Borexino

Author: Davide D’Angelo, M. Agostini, K. Altenmüller, S. Appel, V. Atroshchenko, Z. Bagdasarian, D. Basilico, G. Bellini, J. Benziger, D. Bick, G. Bonfini, D. Bravo, B. Caccianiga, F. Calaprice, A. Caminata, L. Cappelli, P. Cavalcante, F. Cavanna, A. Chepurnov, K. Choi, D. D’Angelo, S. Davini, A. Derbin, A. Di Giacinto, V. Di Marcello, X.F. Ding, A. Di Ludovico, L. Di Noto, I. Drachnev, K. Fomenko, A. Formozov, D. Franco, F. Gabriele, C. Galbiati, M. Gschwender, C. Ghiano, M. Giammarchi, A. Goretti, M. Gromov, D. Guffanti, C. Hagner, E. Hungerford, Aldo Ianni, Andrea Ianni, A. Jany, D. Jeschke, S. Kumaran, V. Kobychev, G. Korga, T. Lachenmaier, M. Laubenstein, E. Litvinovich, P. Lombardi, I. Lomskaya, L. Ludhova, G. Lukyanchenko, L. Lukyanchenko, I. Machulin, G. Manuzio, S. Marcocci, J. Maricic, J. Martyn, E. Meroni, M. Meyer, L. Miramonti, M. Misiaszek, V. Muratova, B. Neumair, M. Nieslony, L. Oberauer, V. Orekhov, F. Ortica, M. Pallavicini, L. Papp, O. Penek, L. Pietrofaccia, N. Pilipenko, A. Pocar, G. Raikov, M.T. Ranalli, G. Ranucci, A. Razeto, A. Re, M. Redchuk, A. Romani, N. Rossi, S. Rottenanger, S. Schönert, D. Semenov, M. Skorokhvatov, O. Smirnov, A. Sotnikov, Y. Suvorov, R. Tartaglia, G. Testera, J. Thurn, E. Unzhakov, A. Vishneva, R.B. Vogelaar, F. von Feilitzsch, M. Wojcik, M. Wurm, O. Zaimidoroga, S. Zavatarelli, K. Zuber, and G. Zuzel
Subjects: Physics, History, Physics::Instrumentation and Detectors, precision measurement, flux [muon], pi, Astronomy, model [atmosphere], solar, Computer Science Applications, Education, Gran Sasso, modulation, correlation, high [energy], High Energy Physics::Experiment, Borexino, Cosmic muons, temperature [atmosphere], Nuclear Experiment
Abstract: The Borexino detector at Gran Sasso has now accumulated over ten years of continuous data which represent a magnificent opportunity to study the cosmic muon flux at a deep underground location. We present here a precision measurement of the flux and of the expected seasonal modulation. We present the correlation with the atmospheric temperature variations from global atmospheric models. We measure the correlation parameters and infer the kaon-to-pion ratio in the production of cosmic muons from high energy primaries. We also find evidence of a long term modulation that is not present in the atmospheric data and we investigate a possible positive correlation with the solar activity. Finally we observe a seasonal modulation of the production rate of cosmogenic neutrons that is in phase with the muon modulation but shows a surprisingly larger amplitude.
Published: 2020
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22. Updated geoneutrino measurement with Borexino

Author: S. Rottenanger, D. Franco, A. Caminata, B. Caccianiga, E. Unzhakov, I. Lomskaya, Andrea Ianni, L. Oberauer, M. Gschwender, I. Drachnev, K. Zuber, O. Zaimidoroga, V. Atroshchenko, D. Guffanti, O. Smirnov, C. Ghiano, R.B. Vogelaar, F. von Feilitzsch, A. Re, G. Bonfini, M. Wojcik, J. Martyn, G. Zuzel, B. Neumair, X.F. Ding, A. Razeto, K. Altenmüller, G. Manuzio, V. Di Marcello, V. Strati, F. Gabriele, M. Redchuk, D. Semenov, F. Mantovani, V. Orekhov, L. Miramonti, M. Vivier, M. Gromov, M. Nieslony, D. Jeschke, N. Rossi, A. Di Ludovico, D. Bick, A. Onillon, R. Tartaglia, Ö. Penek, C. Hagner, J. Thurn, M. Meyer, L. Cappelli, B. Ricci, S. Zavatarelli, L. Pietrofaccia, M. Montuschi, A. Pocar, E. Hungerford, G. Bellini, T. Lachenmaier, A. Romani, T. Lasserre, L. Papp, A. Goretti, D. Basilico, V. Muratova, A. Sotnikov, J. Maricic, S. Kumaran, C. Galbiati, M. Giammarchi, I. Machulin, Z. Bagdasarian, G. Korga, J. Benziger, M. Agostini, S. Marcocci, A. Derbin, S. Schöinert, M. Pallavicini, Y. Suvorov, F. Ortica, Livia Ludhova, M. Skorokhvatov, M. Misiaszek, G. Ranucci, S. Davini, S. Appel, V. Kobychev, M.T. Ranalli, A. Formozov, P. Lombardi, L. Lukyanchenko, M. Laubenstein, E. Meroni, A. Chepurnov, G. Fiorentini, G. Lukyanchenko, L. Di Noto, N. Pilipenko, E. Litvinovich, A. Di Giacinto, D. D'Angelo, D. Bravo, M. Wurm, Aldo Ianni, A. Vishneva, G. Raikov, F. Calaprice, G. Testera, F. Cavanna, L. Ludhova, P. Cavalcante, A. Jany, and K. Choi
Subjects: data analysis method, History, Particle physics, liquid [scintillation counter], Geoneutrino, Computer Science Applications, Education, geophysics [neutrino], statistics, Environmental science, Borexino, low [background], activity report, experimental results
Abstract: Borexino is a 280-ton liquid scintillator detector located at the Laboratori Nazionali del Gran Sasso (LNGS), Italy and is one of the two detectors that has measured geoneutrinos so far. The unprecedented radio-purity of the scintillator, the shielding with highly purified water, and the placement of the detector at a 3800 m w.e. depth have resulted in very low background levels and has made Borexino an excellent apparatus for geoneutrino measurements. The new update of the Borexino geoneutrino measurement, using the data obtained from December 2007 to April 2019, has been presented. Enhanced analysis techniques, adopted in this measurement, have been also presented (poster presentation #39 by S. Kumaran). The updated statistics and the new elaborate analysis have led to more than a factor two increase in exposure ((1.12 ± 0.05) × 1032 protons × yr) when compared to the latest Borexino result from 2015. The resulting geoneutrino signal of 47.0 − 7.7 + 8.4 ( stat ) − 1.9 + 2.4 ( sys ) TNU has − 17.2 + 18.3 % total precision. The geological interpretations of this measurement have been discussed. In particular, the 99% C.L. observation of the mantle signal by exploiting the relatively well-known lithospheric contribution, the estimation of the radiogenic heat, as well as the comparison of these results to the predictions based on different geological models. The upper limits on the power of a hypothetical georeactor that might be present at different locations inside the Earth have been set.
Published: 2020
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23. Constraints on Flavor-Diagonal Non-Standard Neutrino Interactions from Borexino Phase-II

Author: G. Korga, D. Jeschke, Z. Bagdasarian, S. Appel, E. Litvinovich, K. Fomenko, Michael Wurm, M. Gschwender, Matthias Laubenstein, B. Caccianiga, Ö. Penek, F. Calaprice, Sanjib Kumar Agarwalla, J. Thurn, L. Lukyanchenko, J. Martyn, F. Gabriele, D. Bick, Sandra Zavatarelli, G. Raikov, Livia Ludhova, A. M. Goretti, A. S. Chepurnov, Tatsu Takeuchi, O. Zaimidoroga, E. Meroni, G. Zuzel, Cristiano Galbiati, P. Cavalcante, Gioacchino Ranucci, B. Neumair, D. Guffanti, M. Nieslony, D. Bravo, Fausto Ortica, G. Lukyanchenko, G. Testera, Tobias Lachenmaier, Marco Giammarchi, G. Bellini, A. Sotnikov, R. Tartaglia, N. Rossi, D. Semenov, Kai Zuber, Aldo Ianni, S. Kumaran, E. V. Unzhakov, Xuefeng Ding, A. Vishneva, A. Di Ludovico, Matteo Agostini, D. Franco, J. Maricic, Andrey Formozov, D. Basilico, M. Skorokhvatov, N. Pilipenko, F. von Feilitzsch, Y. Suvorov, S. Rottenanger, L. Oberauer, V. N. Muratova, Caren Hagner, M. Gromov, M. Meyer, Andrea Ianni, A. Di Giacinto, A. Razeto, G. Manuzio, I. N. Machulin, A. V. Derbin, M. Misiaszek, Marco Pallavicini, D. D'Angelo, C. Ghiano, A. Jany, L. Cappelli, L. Pietrofaccia, A. Pocar, Marcin Wójcik, V. Atroshchenko, Chen Sun, M. Redchuk, Paolo Lombardi, Lino Miramonti, V. Di Marcello, V. V. Kobychev, E. Hungerford, I. Drachnev, F. Cavanna, K. Altenmüller, R. B. Vogelaar, Alessandra Re, A. Caminata, V. Orekhov, S. Marcocci, G. Bonfini, J. Benziger, K. Choi, S. Davini, Aldo Romani, L. Papp, L. Di Noto, Oleg Smirnov, Stefan Schönert, Agarwalla, S. K., Agostini, M., Altenmuller, K., Appel, S., Atroshchenko, V., Bagdasarian, Z., Basilico, D., Bellini, G., Benziger, J., Bick, D., Bonfini, G., Bravo, D., Caccianiga, B., Calaprice, F., Caminata, A., Cappelli, L., Cavalcante, P., Cavanna, F., Chepurnov, A., Choi, K., D'Angelo, D., Davini, S., Derbin, A., Di Giacinto, A., Di Marcello, V., Ding, X. F., Di Ludovico, A., Di Noto, L., Drachnev, I., Fomenko, K., Formozov, A., Franco, D., Gabriele, F., Galbiati, C., Gschwender, M., Ghiano, C., Giammarchi, M., Goretti, A., Gromov, M., Guffanti, D., Hagner, C., Hungerford, E., Ianni, A., Jany, A., Jeschke, D., Kumaran, S., Kobychev, V., Korga, G., Lachenmaier, T., Laubenstein, M., Litvinovich, E., Lombardi, P., Ludhova, L., Lukyanchenko, G., Lukyanchenko, L., Machulin, I., Manuzio, G., Marcocci, S., Maricic, J., Martyn, J., Meroni, E., Meyer, M., Miramonti, L., Misiaszek, M., Muratova, V., Neumair, B., Nieslony, M., Oberauer, L., Orekhov, V., Ortica, F., Pallavicini, M., Papp, L., Penek, O., Pietrofaccia, L., Pilipenko, N., Pocar, A., Raikov, G., Ranucci, G., Razeto, A., Re, A., Redchuk, M., Romani, A., Rossi, N., Rottenanger, S., Schonert, S., Semenov, D., Skorokhvatov, M., Smirnov, O., Sotnikov, A., Sun, C., Suvorov, Y., Takeuchi, T., Tartaglia, R., Testera, G., Thurn, J., Unzhakov, E., Vishneva, A., Vogelaar, R. B., von Feilitzsch, F., Wojcik, M., Wurm, M., Zaimidoroga, O., Zavatarelli, S., Zuber, K., Zuzel, G., Agarwalla, S, Agostini, M, Altenmuller, K, Appel, S, Atroshchenko, V, Bagdasarian, Z, Basilico, D, Bellini, G, Benziger, J, Bick, D, Bonfini, G, Bravo, D, Caccianiga, B, Calaprice, F, Caminata, A, Cappelli, L, Cavalcante, P, Cavanna, F, Chepurnov, A, Choi, K, D'Angelo, D, Davini, S, Derbin, A, Di Giacinto, A, Di Marcello, V, Ding, X, Di Ludovico, A, Di Noto, L, Drachnev, I, Fomenko, K, Formozov, A, Franco, D, Gabriele, F, Galbiati, C, Gschwender, M, Ghiano, C, Giammarchi, M, Goretti, A, Gromov, M, Guffanti, D, Hagner, C, Hungerford, E, Ianni, A, Jany, A, Jeschke, D, Kumaran, S, Kobychev, V, Korga, G, Lachenmaier, T, Laubenstein, M, Litvinovich, E, Lombardi, P, Ludhova, L, Lukyanchenko, G, Lukyanchenko, L, Machulin, I, Manuzio, G, Marcocci, S, Maricic, J, Martyn, J, Meroni, E, Meyer, M, Miramonti, L, Misiaszek, M, Muratova, V, Neumair, B, Nieslony, M, Oberauer, L, Orekhov, V, Ortica, F, Pallavicini, M, Papp, L, Penek, O, Pietrofaccia, L, Pilipenko, N, Pocar, A, Raikov, G, Ranucci, G, Razeto, A, Re, A, Redchuk, M, Romani, A, Rossi, N, Rottenanger, S, Schonert, S, Semenov, D, Skorokhvatov, M, Smirnov, O, Sotnikov, A, Sun, C, Suvorov, Y, Takeuchi, T, Tartaglia, R, Testera, G, Thurn, J, Unzhakov, E, Vishneva, A, Vogelaar, R, von Feilitzsch, F, Wojcik, M, Wurm, M, Zaimidoroga, O, Zavatarelli, S, Zuber, K, Zuzel, G, AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Borexino, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Physics
Subjects: Physics - Instrumentation and Detectors, neutrino: solar, Physics::Instrumentation and Detectors, Solar neutrino, Physics beyond the Standard Model, Electron, metal: solar, 01 natural sciences, neutrino: flux, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), solar [model], elastic scattering [neutrino electron], [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], neutrino/e: coupling, detector [neutrino], Borexino, Physics, Elastic scattering, interaction [neutrino/tau], new physics, Beyond Standard Model, Neutrino Physics, Instrumentation and Detectors (physics.ins-det), neutrino electron: elastic scattering, coupling [neutrino/e], nuclear reactor [antineutrino], High Energy Physics - Phenomenology, neutrino: detector, Astrophysics - Solar and Stellar Astrophysics, coupling [neutrino], solar [neutrino], Neutrino, precision measurement [Weinberg angle], model: solar, Nuclear and High Energy Physics, Particle physics, sensitivity [detector], FOS: Physical sciences, neutrino/tau: interaction, neutral current: coupling, Weinberg angle: precision measurement, neutrino: new interaction, neutrino: spectrum, 0103 physical sciences, antineutrino: nuclear reactor, neutrino: coupling, lcsh:Nuclear and particle physics. Atomic energy. Radioactivity, ddc:530, 010306 general physics, Solar and Stellar Astrophysics (astro-ph.SR), Standard solar model, chiral [coupling], Neutral current, 010308 nuclear & particles physics, solar [metal], High Energy Physics::Phenomenology, coupling [neutral current], spectrum [neutrino], flux [neutrino], coupling: chiral, detector: sensitivity, new interaction [neutrino], [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], lcsh:QC770-798, High Energy Physics::Experiment, Neutrino Physic
Abstract: The Borexino detector measures solar neutrino fluxes via neutrino-electron elastic scattering. Observed spectra are determined by the solar-$\nu_{e}$ survival probability $P_{ee}(E)$, and the chiral couplings of the neutrino and electron. Some theories of physics beyond the Standard Model postulate the existence of Non-Standard Interactions (NSI's) which modify the chiral couplings and $P_{ee}(E)$. In this paper, we search for such NSI's, in particular, flavor-diagonal neutral current interactions that modify the $\nu_e e$ and $\nu_\tau e$ couplings using Borexino Phase II data. Standard Solar Model predictions of the solar neutrino fluxes for both high- and low-metallicity assumptions are considered. No indication of new physics is found at the level of sensitivity of the detector and constraints on the parameters of the NSI's are placed. In addition, with the same dataset the value of $\sin^2\theta_W$ is obtained with a precision comparable to that achieved in reactor antineutrino experiments., Comment: 28 pages, 7 figures. Slight modifications in the title, abstract, and conclusion. Few references added. Text expanded for clarity. Accepted in JHEP
Published: 2019
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24. DarkSide new results and prospects

Author: P. Agnes, I. F. M. Albuquerque, T. Alexander, A. K. Alton, G. R. Araujo, D. M. Asner, M. P. Ave, H. O. Back, B. Baldin, G. Batignani, K. Biery, V. Bocci, G. Bon- fini, W. Bonivento, B. Bottino, F. Budano, S. Bussino, M. Cadoni, F. Calaprice, A. Caminata, N. Canci, A. Candela, M. Caravati, M. Cariello, M. Carlini, M. Carpinelli, S. Catalanotti, V. Cataudella, P. Cavalcante, S. Cavuoti, A. Chepurnov, C. Cical` o, L. Cifarelli, A. G. Cocco, G. Covone, D. D’Angelo, M. D’Incecco, D. D’Urso, S. Davin, A. De Candia, S. De Cecco, M. De Deo, G. De Filippis, G. De Rosa, M. De Vincenzi, P. Demontis, A. V. Derbin, A. De- voto, F. Di Eusanio, G. Di Pietro, C. Dionisi, M. Downing, E. Edkins, A. Empl, A. Fan, FIORILLO, GIULIO, K. Fomenko, D. Franco, F. Gabriele, A. Gabrieli, C. Galbiati, P. Garcia Abia, S. Giagu, C. Giganti, G. K. Giovanetti, O. Gorchakov, A. M. Goretti, F. Granato, M. Gromov, M. Guan, Y. Guardincerri, M. Gulino, B. R. Hackett, M. H. Hassanshahi, K. Herner, B. Hos- seini, D. Hughes, P. Humble, E. V. Hungerford, Al. Ianni, An. Ianni, V. Ippolito, I. James, T. N. Johnson, Y. Kahn, K. Keeter, C. L. Kendziora, I. Kochanek, G. Koh, D. Korablev, G. Ko- rga, A. Kubankin, M. Kuss, M. La Commara, M. Lai, X. Li, M. Lisanti, M. Lissia, B. Loer, G. Longo, Y. Ma, A. A. Machado, I. N. Machulin, A. Mandarano, L. Mapelli, S. M. Mari, J. Mari- cic, C. J. Martoff, A. Messina, P. D. Meyers, R. Milincic, S. Mishra-Sharma, A. Monte, M. Mor- rocchi, B. J. Mount, V. N. Muratova, P. Musico, R. Nania, A. Navrer Agasson, A. O. Nozdrina, A. Oleinik, M. Orsini, F. Ortica, L. Pagani, M. Pallavicini, L. Pandola, E. Pantic, E. Paolon, F. Pazzona, K. Pelczar, N. Pelliccia, V. Pesudo, E. Picciau, A. Pocar, S. Pordes, S. S. Poudel, D. A. Pugachev, H. Qian, F. Ragusa, M. Razeti, A. Razeto, B. Reinhold, A. L. Renshaw, M. Rescigno, Q. Riffard, A. Romani, B. Rossi, N. Rossi, D. Sablone, O. Samoylov, W. Sands, S. Sanfilippo, M. Sant, R. Santorelli, C. Savarese, E. Scapparone, B. Schlitzer, E. Segreto, D. A. Semenov, A. Shchagin, A. Sheshukov, P. N. Singh, M. D. Skorokhvatov, O. Smirnov, A. Sotnikov, C. Stanford, S. Stracka, G. B. Suffritti, Y. Suvorov, R. Tartaglia, G. Testera, A. Tonazzo, P. Trinchese, E. V. Unzhakov, M. Verducci, A. Vishneva, B. Vogelaar, M. Wada, T. J. Waldrop, H. Wang, Y. Wang, A. W. Watson, S. Westerdale, M. M. Wojcik, M. Wojcik, X. Xiang, X. Xiao, C. Yang, Z. Ye, C. Zhu, A. Zichichi, G. Zuzel., Cadeddu, M, Agnes, P, Albuquerque, I, Alexander, T, Alton, A, Araujo, G, Asner, D, Ave, M, Back, H, Baldin, B, Batignani, G, Biery, K, Bocci, V, Bonfini, G, Bonivento, W, Bottino, B, Budano, F, Bussino, S, Cadoni, M, Calaprice, F, Caminata, A, Canci, N, Candela, A, Caravati, M, Cariello, M, Carlini, M, Carpinelli, M, Catalanotti, S, Cataudella, V, Cavalcante, P, Cavuoti, S, Chepurnov, A, Cicalo, C, Cifarelli, L, Cocco, A, Covone, G, D'Angelo, D, D'Incecco, M, D'Urso, D, Davin, S, de Candia, A, de Cecco, S, de Deo, M, de Filippis, G, de Rosa, G, de Vincenzi, M, Demontis, P, Derbin, A, Devoto, A, Di Eusanio, F, Di Pietro, G, Dionisi, C, Downing, M, Edkins, E, Empl, A, Fan, A, Fiorillo, G, Fomenko, K, Franco, D, Gabriele, F, Gabrieli, A, Galbiati, C, Abia, P, Giagu, S, Giganti, C, Giovanetti, G, Gorchakov, O, Goretti, A, Granato, F, Gromov, M, Guan, M, Guardincerri, Y, Gulino, M, Hackett, B, Hassanshahi, M, Herner, K, Hos-Seini, B, Hughes, D, Humble, P, Hungerford, E, Ianni, A, Ippolito, V, James, I, Johnson, T, Kahn, Y, Keeter, K, Kendziora, C, Kochanek, I, Koh, G, Korablev, D, Korga, G, Kubankin, A, Kuss, M, la Commara, M, Lai, M, Li, X, Lisanti, M, Lissia, M, Loer, B, Longo, G, Ma, Y, Machado, A, Machulin, I, Mandarano, A, Mapelli, L, Mari, S, Maricic, J, Martoff, C, Messina, A, Meyers, P, Milincic, R, Mishra-Sharma, S, Monte, A, Morrocchi, M, Mount, B, Muratova, V, Musico, P, Nania, R, Agasson, A, Nozdrina, A, Oleinik, A, Orsini, M, Ortica, F, Pagani, L, Pallavicini, M, Pandola, L, Pantic, E, Paolon, E, Pazzona, F, Pelczar, K, Pelliccia, N, Pesudo, V, Picciau, E, Pocar, A, Pordes, S, Poudel, S, Pugachev, D, Qian, H, Ragusa, F, Razeti, M, Razeto, A, Reinhold, B, Renshaw, A, Rescigno, M, Riffard, Q, Romani, A, Rossi, B, Rossi, N, Sablone, D, Samoylov, O, Sands, W, Sanfilippo, S, Sant, M, Santorelli, R, Savarese, C, Scapparone, E, Schlitzer, B, Segreto, E, Semenov, D, Shchagin, A, Sheshukov, A, Singh, P, Skorokhvatov, M, Smirnov, O, Sotnikov, A, Stanford, C, Stracka, S, Suffritti, G, Suvorov, Y, Tartaglia, R, Testera, G, Tonazzo, A, Trinchese, P, Unzhakov, E, Verducci, M, Vishneva, A, Vogelaar, B, Wada, M, Waldrop, T, Wang, H, Wang, Y, Watson, A, Westerdale, S, Wojcik, M, Xiang, X, Xiao, X, Yang, C, Ye, Z, Zhu, C, Zichichi, A, Zuzel, G, Agnes, P., Albuquerque, I. F. M., Alexander, T., Alton, A. K., Araujo, G. R., Asner, D. M., Ave, M. P., Back, H. O., Baldin, B., Batignani, G., Biery, K., Bocci, V., Bon- fini, G., Bonivento, W., Bottino, B., Budano, F., Bussino, S., Cadoni, M., Calaprice, F., Caminata, A., Canci, N., Candela, A., Caravati, M., Cariello, M., Carlini, M., Carpinelli, M., Catalanotti, S., Cataudella, V., Cavalcante, P., Cavuoti, S., Chepurnov, A., Cical` o, C., Cifarelli, L., Cocco, A. G., Covone, G., D’Angelo, D., D’Incecco, M., D’Urso, D., Davin, S., De Candia, A., De Cecco, S., De Deo, M., De Filippis, G., De Rosa, G., De Vincenzi, M., Demontis, P., Derbin, A. V., De- voto, A., Di Eusanio, F., Di Pietro, G., Dionisi, C., Downing, M., Edkins, E., Empl, A., Fan, A., Fiorillo, Giulio, Fomenko, K., Franco, D., Gabriele, F., Gabrieli, A., Galbiati, C., Garcia Abia, P., Giagu, S., Giganti, C., Giovanetti, G. K., Gorchakov, O., Goretti, A. M., Granato, F., Gromov, M., Guan, M., Guardincerri, Y., Gulino, M., Hackett, B. R., Hassanshahi, M. H., Herner, K., Hos- seini, B., Hughes, D., Humble, P., Hungerford, E. V., Ianni, Al., Ianni, An., Ippolito, V., James, I., Johnson, T. N., Kahn, Y., Keeter, K., Kendziora, C. L., Kochanek, I., Koh, G., Korablev, D., Ko- rga, G., Kubankin, A., Kuss, M., La Commara, M., Lai, M., Li, X., Lisanti, M., Lissia, M., Loer, B., Longo, G., Ma, Y., Machado, A. A., Machulin, I. N., Mandarano, A., Mapelli, L., Mari, S. M., Mari- cic, J., Martoff, C. J., Messina, A., Meyers, P. D., Milincic, R., Mishra-Sharma, S., Monte, A., Mor- rocchi, M., Mount, B. J., Muratova, V. N., Musico, P., Nania, R., Navrer Agasson, A., Nozdrina, A. O., Oleinik, A., Orsini, M., Ortica, F., Pagani, L., Pallavicini, M., Pandola, L., Pantic, E., Paolon, E., Pazzona, F., Pelczar, K., Pelliccia, N., Pesudo, V., Picciau, E., Pocar, A., Pordes, S., Poudel, S. S., Pugachev, D. A., Qian, H., Ragusa, F., Razeti, M., Razeto, A., Reinhold, B., Renshaw, A. L., Rescigno, M., Riffard, Q., Romani, A., Rossi, B., Rossi, N., Sablone, D., Samoylov, O., Sands, W., Sanfilippo, S., Sant, M., Santorelli, R., Savarese, C., Scapparone, E., Schlitzer, B., Segreto, E., Semenov, D. A., Shchagin, A., Sheshukov, A., Singh, P. N., Skorokhvatov, M. D., Smirnov, O., Sotnikov, A., Stanford, C., Stracka, S., Suffritti, G. B., Suvorov, Y., Tartaglia, R., Testera, G., Tonazzo, A., Trinchese, P., Unzhakov, E. V., Verducci, M., Vishneva, A., Vogelaar, B., Wada, M., Waldrop, T. J., Wang, H., Wang, Y., Watson, A. W., Westerdale, S., Wojcik, M. M., Wojcik, M., Xiang, X., Xiao, X., Yang, C., Ye, Z., Zhu, C., Zichichi, A., and G. Zuzel.
Subjects: DarkSide
Abstract: New results on the scattering cross-section between dark matter particles and nuclei and electrons are presented. They are obtained using a live- days exposure of 532.4 days from the DarkSide-50 experiment, which is a dual-phase liquid-argon time projection chamber (LAr TPC) installed at Laboratori Nazionali del Gran Sasso (LNGS). In this paper, the DarkSide-20k experiment, a LAr TPC with an active (fiducial) mass of 23 t (20 t) to be built at LNGS, is also reviewed. Thanks to its exceptionally low instrumental background, DarkSide-20k will be able to exclude cross sections between weakly interacting massive particles (WIMPs) and nuclei at 90% confidence level down to 2.8×10−48 cm2 (1.2×10−47 cm2) for a WIMP mass of 100 GeV/c2 (1 TeV/c2 ).
Published: 2018

25. Quenching Measurements and Modeling of a Boron-Loaded Organic Liquid Scintillator

Author: E. Shields, Jilei Xu, Xiao Fang, Henning O. Back, Mallory Smith, Wanpeng Tan, Thomas Alexander, Q. Liu, S. Westerdale, Francis Froborg, F. Calaprice, Clark Casarella, Stephanie Lyons, Y. K. Gupta, Ani Aprahamian, and Edward Lamere
Subjects: Materials science, Physics - Instrumentation and Detectors, Proton, Physics::Instrumentation and Detectors, Nuclear Theory, FOS: Physical sciences, Scintillator, nucl-ex, 7. Clean energy, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Recoil, 0103 physical sciences, Neutron detection, Neutron, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, Instrumentation, physics.ins-det, Mathematical Physics, Quenching, Scintillation, 010308 nuclear & particles physics, hep-ex, Instrumentation and Detectors (physics.ins-det), Nuclear & Particles Physics, Neutron temperature
Abstract: Organic liquid scintillators are used in a wide variety of applications in experimental nuclear and particle physics. Boron-loaded scintillators are particularly useful for detecting neutron captures, due to the high thermal neutron capture cross section of $^{10}$B. These scintillators are commonly used in neutron detectors, including the DarkSide-50 neutron veto, where the neutron may produce a signal when it scatters off protons in the scintillator or when it captures on $^{10}$B. Reconstructing the energy of these recoils is complicated by scintillation quenching. Understanding how nuclear recoils are quenched in these scintillators is an important and difficult problem. In this article, we present a set of measurements of neutron-induced proton recoils in a boron-loaded organic liquid scintillator at recoil energies ranging from 57--467 keV, and we compare these measurements to predictions from different quenching models. We find that a modified Birks' model whose denominator is quadratic in $dE/dx$ best describes the measurements, with $\chi^2$/NDF$=1.6$. This result will help model nuclear recoil scintillation in similar detectors and can be used to improve their neutron tagging efficiency.
Published: 2017
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26. The electronics and data acquisition system for the DarkSide-50 veto detectors

Author: V. N. Muratova, B. Bottino, E. V. Unzhakov, C. Stanford, G. Koh, B. Baldin, J. Brodsky, J. Wilhelmi, S. De Cecco, P. Saggese, Chung-Yao Yang, C. Savarese, A. Tonazzo, S. D. Rountree, M. Montuschi, Paolo Lombardi, S. Davini, C. J. Martoff, M. Carlini, Peter Daniel Meyers, Yufeng Wang, M. D. Skorokhvatov, L. Grandi, P. N. Singh, M. Gromov, A. Mandarano, A. Kubankin, M. Guan, Y. Suvorov, G. Zuzel, S. Luitz, E. Segreto, A. Candela, S. Westerdale, G. Testera, A. M. Goretti, A. S. Chepurnov, F. Budano, V. V. Kobychev, Mariano Cadoni, E. Pantic, P. J. Mosteiro, A. K. Alton, A. Sotnikov, Aldo Ianni, B. Reinhold, B. R. Hackett, A. Empl, F. Gabriele, E. Edkins, B. J. Mount, A. Zec, L. Agostino, H. Cao, D. Semenov, M. Orsini, J. Maricic, Hui Wang, R. B. Vogelaar, M. De Vincenzi, N. Canci, Caoxiang Zhu, M. De Deo, R. Tartaglia, D. Montanari, Ivone F. M. Albuquerque, A. L. Renshaw, A. Devoto, Griffin Foster, P. Cavalcante, Samuele Sangiorgio, M. Cadeddu, Stefano Maria Mari, J. Tatarowicz, T. Alexander, S. Odrowski, T. Miletic, D. Franco, Sandra Zavatarelli, W. Zhong, C. Giganti, K. Arisaka, K. Herner, R. Saldanha, Fausto Ortica, G. Fiorillo, L. Crippa, K. Fomenko, M. Wada, F. Calaprice, M. D'Incecco, Stuart Derek Walker, A. Vishneva, K. Randle, Anselmo Meregaglia, X. Li, H. Qian, Irina James, Y. Guardincerri, M. E. Monzani, A. Pocar, K. Keeter, A. Monte, Jilei Xu, Q. Riffard, S. Parmeggiano, D. Korablev, A. Brigatti, Jim Napolitano, D. Sablone, N. Pelliccia, X. Xiang, E. Shields, Gioacchino Ranucci, Y. Q. Ma, L. Marini, M. Bossa, B. Rossi, Alan Watson, K. Biery, A. Fan, D. A. Pugachev, Oleg Smirnov, S. Catalanotti, A. G. Cocco, F. Di Eusanio, Aldo Romani, P. Agnes, A. Razeto, P. Musico, W. Sands, M. Cariello, Andrea Ianni, A. V. Derbin, K. Pelczar, Cristiano Galbiati, C. L. Kendziora, M. M. Wojcik, G. Korga, F. Granato, Ann E. Nelson, I. N. Machulin, N. Rossi, Marco Pallavicini, D. D'Angelo, E. Hungerford, R. Milincic, S. Pordes, Henning O. Back, G. Bonfini, Cécile Jollet, J. Yoo, G. Di Pietro, Giovanni Covone, Severino Angelo Maria Bussino, L. Pagani, Marcello Lissia, P. Trinchese, AstroParticule et Cosmologie (APC (UMR_7164)), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Département Recherches Subatomiques (DRS-IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), Centre Hospitalier Universitaire de Nice (CHU de Nice), Biomécanique et Bioingénierie (BMBI), Université de Technologie de Compiègne (UTC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Astrophysique de Marseille (LAM), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Institut Pluridisciplinaire Hubert Curien (IPHC), Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA), Kavli Institute for Particle Astrophysics and Cosmology (KIPAC), Stanford University [Stanford], Max-Planck-Institut für Kernphysik (MPIK), Max-Planck-Gesellschaft, Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique (LERMA), École normale supérieure - Paris (ENS Paris)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Centre National de la Recherche Scientifique (CNRS), Departamento de Engenharia Elétrica [Minas Gerais] (DEE - UFMG), Universidade Federal de Minas Gerais, Rhodes University, inconnu, Inconnu, Key Lab of Computer System and Architecture, Institute of Computing Technology [Beijing] (ICT), Chinese Academy of Sciences [Beijing] (CAS), Institut Européen des membranes (IEM), Université de Montpellier (UM)-Université Montpellier 2 - Sciences et Techniques (UM2)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS), Agnes, P., Agostino, L., Albuquerque, I. F. M., Alexander, T., Alton, A. K., Arisaka, K., Back, H. O., Baldin, B., Biery, K., Bonfini, G., Bossa, M., Bottino, B., Brigatti, A., Brodsky, J., Budano, F., Bussino, S., Cadeddu, M., Cadoni, M., Calaprice, F., Canci, N., Candela, A., Cao, H., Cariello, M., Carlini, M., Catalanotti, S., Cavalcante, P., Chepurnov, A., Cocco, A. G., Covone, G., Crippa, L., D'Angelo, D., D'Incecco, M., Davini, S., Dececco, S., De Deo, M., De Vincenzi, M., Derbin, A., Devoto, A., Di Eusanio, F., Di Pietro, G., Edkins, E., Empl, A., Fan, A., Fiorillo, G., Fomenko, K., Foster, G., Franco, D., Gabriele, F., Galbiati, C., Giganti, C., Goretti, A. M., Granato, F., Grandi, L., Gromov, M., Guan, M., Guardincerri, Y., Hackett, B. R., Herner, K. R., Hungerford, E. V., Ianni, Aldo, Ianni, Andrea, James, I., Jollet, C., Keeter, K., Kendziora, C. L., Kobychev, V., Koh, G., Korablev, D., Korga, G., Kubankin, A., Li, X., Lissia, M., Lombardi, P., Luitz, S., Ma, Y., Machulin, I. N., Mandarano, A., Mari, S. M., Maricic, J., Marini, L., Martoff, C. J., Meregaglia, A., Meyers, P. D., Miletic, T., Milincic, R., Montanari, D., Monte, A., Montuschi, M., Monzani, M. E., Mosteiro, P., Mount, B. J., Muratova, V. N., Musico, P., Napolitano, J., Nelson, A., Odrowski, S., Orsini, M., Ortica, F., Pagani, L., Pallavicini, M., Pantic, E., Parmeggiano, S., Pelczar, K., Pelliccia, N., Pocar, A., Pordes, S., Pugachev, D. A., Qian, H., Randle, K., Ranucci, G., Razeto, A., Reinhold, B., Renshaw, A. L., Riffard, Q., Romani, A., Rossi, B., Rossi, N., Rountree, S. D., Sablone, D., Saggese, P., Saldanha, R., Sands, W., Sangiorgio, S., Savarese, C., Segreto, E., Semenov, D. A., Shields, E., Singh, P. N., Skorokhvatov, M. D., Smirnov, O., Sotnikov, A., Stanford, C., Suvorov, Y., Tartaglia, R., Tatarowicz, J., Testera, G., Tonazzo, A., Trinchese, P., Unzhakov, E. V., Vishneva, A., Vogelaar, R. B., Wada, M., Walker, S., Wang, H., Wang, Y., Watson, A. W., Westerdale, S., Wilhelmi, J., Wojcik, M. M., Xiang, X., Xu, J., Yang, C., Yoo, J., Zavatarelli, S., Zec, A., Zhong, W., Zhu, C., Zuzel, G., Budano, Federico, Bussino, Severino Angelo Maria, DE VINCENZI, Mario, James, Irina, and Mari, Stefano Maria
Subjects: Physics - Instrumentation and Detectors, gas and liquid scintillators), architecture, Physics::Instrumentation and Detectors, Dark matter, FOS: Physical sciences, Scintillator, algorithms, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Data acquisition, Front-end electronics for detector readout, 0103 physical sciences, hardware, Neutron, Detector control systems (detector and experiment monitoring and slow control systems, 010306 general physics, Instrumentation, Cherenkov radiation, ComputingMilieux_MISCELLANEOUS, Mathematical Physics, Physics, [PHYS]Physics [physics], Time projection chamber, Data acquisition concepts, Scintillators, scintillation and light emission processes (solid, gas and liquid scintillators), Detector control systems (detector and experiment monitoring and slow control systems, architecture, hardware, algorithms, databases), 010308 nuclear & particles physics, Detector, Astrophysics::Instrumentation and Methods for Astrophysics, Instrumentation and Detectors (physics.ins-det), scintillation and light emission processes (solid, Weakly interacting massive particles, Scintillators, High Energy Physics::Experiment, databases), [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract: International audience; DarkSide-50 is a detector for dark matter candidates in the form of weakly interacting massive particles. It utilizes a liquid argon time projection chamber for the inner main detector, surrounded by a liquid scintillator veto (LSV) and a water Cherenkov veto detector (WCV). The LSV and WCV act as the neutron and cosmogenic muon veto detectors for DarkSide-50. This paper describes the electronics and data acquisition system used for these two detectors. The system is made of a custom built front end electronics and commercial National Instruments high speed digitizers. The front end electronics, the DAQ, and the trigger system have been used to acquire data in the form of zero-suppressed waveform samples from the 110 PMTs of the LSV and the 80 PMTs of the WCV. The veto DAQ system has proven its performance and reliability. This electronics and DAQ system can be scaled and used as it is for the veto of the next generation DarkSide-20k detector
Published: 2016
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27. Journal of Instrumentation

Author: P. Agnes, I.F.M. Albuquerque, T. Alexander, A.K. Alton, D.M. Asner, H.O. Back, B. Baldin, K. Biery, V. Bocci, G. Bonfini, W. Bonivento, M. Bossa, B. Bottino, A. Brigatti, J. Brodsky, F. Budano, S. Bussino, M. Cadeddu, L. Cadonati, M. Cadoni, F. Calaprice, N. Canci, A. Candela, M. Caravati, M. Cariello, M. Carlini, S. Catalanotti, P. Cavalcante, A. Chepurnov, C. Cicalò, A.G. Cocco, G. Covone, D. D'Angelo, M. D'Incecco, S. Davini, S. De Cecco, M. De Deo, M. De Vincenzi, A. Derbin, A. Devoto, F. Di Eusanio, G. Di Pietro, C. Dionisi, E. Edkins, A. Empl, A. Fan, G. Fiorillo, K. Fomenko, G. Forster, D. Franco, F. Gabriele, C. Galbiati, S. Giagu, C. Giganti, G.K. Giovanetti, A.M. Goretti, F. Granato, L. Grandi, M. Gromov, M. Guan, Y. Guardincerri, B.R. Hackett, K. Herner, D. Hughes, P. Humble, E.V. Hungerford, Al. Ianni, An. Ianni, I. James, T.N. Johnson, C. Jollet, K. Keeter, C.L. Kendziora, G. Koh, D. Korablev, G. Korga, A. Kubankin, X. Li, M. Lissia, B. Loer, P. Lombardi, G. Longo, Y. Ma, A.A. Machado, I.N. Machulin, A. Mandarano, S.M. Mari, J. Maricic, L. Marini, C.J. Martoff, A. Meregaglia, P.D. Meyers, R. Milincic, J.D. Miller, D. Montanari, A. Monte, B.J. Mount, V.N. Muratova, P. Musico, J. Napolitano, A. Navrer Agasson, S. Odrowski, M. Orsini, F. Ortica, L. Pagani, M. Pallavicini, E. Pantic, S. Parmeggiano, K. Pelczar, N. Pelliccia, A. Pocar, S. Pordes, D.A. Pugachev, H. Qian, K. Randle, G. Ranucci, M. Razeti, A. Razeto, B. Reinhold, A.L. Renshaw, M. Rescigno, Q. Riffard, A. Romani, B. Rossi, N. Rossi, D. Rountree, D. Sablone, P. Saggese, R. Saldanha, W. Sands, C. Savarese, B. Schlitzer, E. Segreto, D.A. Semenov, E. Shields, P.N. Singh, M.D. Skorokhvatov, O. Smirnov, A. Sotnikov, C. Stanford, Y. Suvorov, R. Tartaglia, J. Tatarowicz, G. Testera, A. Tonazzo, P. Trinchese, E.V. Unzhakov, M. Verducci, A. Vishneva, B. Vogelaar, M. Wada, S. Walker, H. Wang, Y. Wang, A.W. Watson, S. Westerdale, J. Wilhelmi, M.M. Wojcik, Xi. Xiang, X. Xiao, J. Xu, C. Yang, A. Zec, W. Zhong, C. Zhu, G. Zuzel, AstroParticule et Cosmologie ( APC - UMR 7164 ), Centre National de la Recherche Scientifique ( CNRS ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Observatoire de Paris-Université Paris Diderot - Paris 7 ( UPD7 ) -Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ), Laboratoire de Physique Nucléaire et de Hautes Énergies ( LPNHE ), Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Université Paris Diderot - Paris 7 ( UPD7 ) -Centre National de la Recherche Scientifique ( CNRS ), Institut Pluridisciplinaire Hubert Curien ( IPHC ), Université de Strasbourg ( UNISTRA ) -Centre National de la Recherche Scientifique ( CNRS ), DarkSide, AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE (UMR_7585)), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Physics, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA), Agnes, P., Albuquerque, I. F. M., Alexander, T., Alton, A. K., Asner, D. M., Back, H. O., Baldin, B., Biery, K., Bocci, V., Bonfini, G., Bonivento, W., Bossa, M., Bottino, B., Brigatti, A., Brodsky, J., Budano, F., Bussino, S., Cadeddu, M., Cadonati, L., Cadoni, M., Calaprice, F., Canci, N., Candela, A., Caravati, M., Cariello, M., Carlini, M., Catalanotti, S., Cavalcante, P., Chepurnov, A., Cicalo, C., Cocco, A. G., D'Angelo, D., D'Incecco, M., Davini, S., De Cecco, S., De Deo, M., De Vincenzi, M., Derbin, A., Devoto, A., Di Eusanio, F., Di Pietro, G., Dionisi, C., Edkins, E., Empl, A., Fan, A., Fiorillo, G., Fomenko, K., Forster, G., Franco, D., Gabriele, F., Galbiati, C., Giagu, S., Giganti, C., Giovanetti, G. K., Goretti, A. M., Granato, F., Grandi, L., Gromov, M., Guan, M., Guardincerri, Y., Hackett, B. R., Herner, K., Hughes, D., Humble, P., Hungerford, E. V., Ianni, Al., Ianni, An., James, I., Johnson, T. N., Jollet, C., Keeter, K., Kendziora, C. L., Koh, G., Korablev, D., Korga, G., Kubankin, A., Li, X., Lissia, M., Loer, B., Lombardi, P., Longo, G., Ma, Y., Machado, A. A., Machulin, I. N., Mandarano, A., Mari, S. M., Maricic, J., Marini, L., Martoff, C. J., Meregaglia, A., Meyers, P. D., Milincic, R., Miller, J. D., Montanari, D., Monte, A., Mount, B. J., Muratova, V. N., Musico, P., Napolitano, J., Agasson, A. Navrer, Odrowski, S., Orsini, M., Ortica, F., Pagani, L., Pallavicini, M., Pantic, E., Parmeggiano, S., Pelczar, K., Pelliccia, N., Pocar, A., Pordes, S., Pugachev, D. A., Qian, H., Randle, K., Ranucci, G., Razeti, M., Razeto, A., Reinhold, B., Renshaw, A. L., Rescigno, M., Riffard, Q., Romani, A., Rossi, B., Rossi, N., Rountree, D., Sablone, D., Saggese, P., Saldanha, R., Sands, W., Savarese, C., Schlitzer, B., Segreto, E., Semenov, D. A., Shields, E., Singh, P. N., Skorokhvatov, M. D., Smirnov, O., Sotnikov, A., Stanford, C., Suvorov, Y., Tartaglia, R., Tatarowicz, J., Testera, G., Tonazzo, A., Trinchese, P., Unzhakov, E. V., Verducci, M., Vishneva, A., Vogelaar, B., Wada, M., Walker, S., Wang, H., Wang, Y., Watson, A. W., Westerdale, S., Wilhelmi, J., Wojcik, M. M., Xiang, Xi., Xiao, X., Xu, J., Yang, C., Zec, A., Zhong, W., Zhu, C., Zuzel, G., Covone, G., Navrer Agasson, A., and Semenova, D. A.
Subjects: axions, Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, Detector alignment and calibration methods (lasers, sources, particle-beams), scintillation counter: liquid, remote operation, 01 natural sciences, Dark Matter detectors (WIMPs, axions, etc.), Instrumentation, Mathematical Physics, Low-background detectors, etc.), hardware, [ PHYS.PHYS.PHYS-INS-DET ] Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Physics, Radioactive source calibration, Time projection chamber, Detector, Instrumentation and Detectors (physics.ins-det), particle-beams), Physics - Instrumentation and Detector, organic compounds, sources, Fabrication, WIMP, Dark matter, Noble liquid detectors, FOS: Physical sciences, fabrication, Scintillator, Optics, 0103 physical sciences, Calibration, Neutron, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 010306 general physics, Dark Matter detectors (WIMPs, detector: design, 010308 nuclear & particles physics, business.industry, dark matter: detector, calibration, time projection chamber: liquid argon, Liquid scintillators, calibration device, insertion device, Detector alignment and calibration methods (lasers, efficiency, Neutron source, business
Abstract: This paper describes the design, fabrication, commissioning and use of a CALibration source Insertion System (CALIS) in the DarkSide-50 direct dark matter search experiment. CALIS deploys radioactive sources into the liquid scintillator veto to characterize the detector response and detection efficiency of the DarkSide-50 Liquid Argon Time Projection Chamber, and the surrounding 30 t organic liquid scintillator neutron veto. It was commissioned in September 2014 and has been used successfully in several gamma and neutron source campaigns since then. A description of the hardware and an excerpt of calibration analysis results are given below., 21 pages, 11 figures
Published: 2016
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28. Development of an Extreme Environment Materials Research Facility at Princeton

Author: T. Stevenson, A. B. Cohen, G. Ascione, R. Woolley, K. McDonald, L. Dudek, H.W. Kugel, R. Davidson, C.A. Gentile, K. Pagdon, Christopher George Tully, Robert H. Austin, Larry R. Grisham, F. Calaprice, G. Baker, and A. Zwicker
Subjects: Physics, Nuclear and High Energy Physics, Mechanical Engineering, Nuclear engineering, Particle accelerator, Fusion power, Radiation, Linear particle accelerator, law.invention, Nuclear physics, Nuclear Energy and Engineering, Beamline, law, General Materials Science, Neutron, Tokamak Fusion Test Reactor, Beam (structure), Civil and Structural Engineering
Abstract: The need for a fundamental understanding of material response to a neutron and/or high heat flux environment can yield development of improved materials and operations with existing materials. Such understanding has numerous applications in fields such as nuclear power (for the current fleet and future fission and fusion reactors), aerospace, and other research fields (e.g., high-intensity proton accelerator facilities for high energy physics research). A proposal has been advanced to develop a facility for testing various materials under extreme heat and neutron exposure conditions at Princeton. The Extreme Environment Materials Research Facility comprises an environmentally controlled chamber (48 m^3) capable of high vacuum conditions, with extreme flux beams and probe beams accessing a central, large volume target. The facility will have the capability to expose large surface areas (1 m^2) to 14 MeV neutrons at a fluence in excess of 10^13 n/s. Depending on the operating mode. Additionally beam line power on the order of 15-75 MW/m2 for durations of 1-15 seconds are planned... The multi-second duration of exposure can be repeated every 2-10 minutes for periods of 10-12 hours. The facility will be housed in the test cell that held the Tokamak Fusion Test Reactor (TFTR), which has themore » desired radiation and safety controls as well as the necessary loading and assembly infrastructure. The facility will allow testing of various materials to their physical limit of thermal endurance and allow for exploring the interplay between radiation-induced embrittlement, swelling and deformation of materials, and the fatigue and fracturing that occur in response to thermal shocks. The combination of high neutron energies and intense fluences will enable accelerated time scale studies. The results will make contributions for refining predictive failure modes (modeling) in extreme environments, as well as providing a technical platform for the development of new alloys, new materials, and the investigation of repair mechanisms. Effects on materials will be analyzed with in situ beam probes and instrumentation as the target is exposed to radiation, thermal fluxes and other stresses. Photon and monochromatic neutron fluxes, produced using a variable-energy (4-45 MeV) electron linac and the highly asymmetric electron-positron collisions technique used in high-energy physics research, can provide non-destructive, deep-penetrating structural analysis of materials while they are undergoing testing. The same beam lines will also be able to generate neutrons from photonuclear interactions using existing Bremsstrahlung and positrons on target quasi-monochromatic gamma rays. Other diagnostics will include infrared cameras, residual gas analyzer (RGA), and thermocouples; additional diagnostic capability will be added.« less
Published: 2011
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29. First real time detection of 7Be solar neutrinos by Borexino

Author: A. Martemianov, S. Gazzana, K. McCarty, Andrew Sonnenschein, Malcolm J. Joyce, M. Misiaszek, Cristiano Galbiati, S. Vitale, G. Manuzio, S. Hardy, C. Salvo, O. Smirnov, Hardy Simgen, Matthias Laubenstein, V. Muratova, M. E. Monzani, O. Zaimidoroga, A. Pocar, Andrea Ianni, Sandra Zavatarelli, A.V. Etenko, Aldo Ianni, M. Goeger-Neff, G. Testera, A. Razeto, Livia Ludhova, V. G. Tarasenkov, D. Franco, F. Dalnoki-Veress, R. Tartaglia, L. Papp, G. Bellini, R. J. Ford, R. S. Raghavan, Marco Giammarchi, C. Arpesella, S. Bonetti, Marcin Wójcik, G. Korga, D. Kryn, Fausto Masetti, A. A. Sabelnikov, Paolo Lombardi, M. Skorokhvatov, C. Grieb, S. V. Sukhotin, Y. Suvorov, R. B. Vogelaar, Martin Deutsch, S. Schönert, L. Oberauer, M. Obolensky, H. de Kerret, L. Perasso, Fausto Ortica, I. Machulin, E. Litvinovich, B. Caccianiga, F. Calaprice, F. von Feilitzsch, L. Niedermeier, Michael K.H. Leung, B. Freudiger, Marco Pallavicini, D. D'Angelo, K. Fomenko, J. Benziger, G. Zuzel, A. Sotnikov, A. Derbin, E. Meroni, A. Goretti, G. Heusser, Gioacchino Ranucci, D. Montanari, D. Vignaud, Lino Miramonti, APC - Neutrinos, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), AstroParticule et Cosmologie (APC (UMR_7164)), Borexino, Arpesella, C., Suvorov, Y., Et, Al., Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC)-AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, and PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)
Subjects: Low background detector, Nuclear and High Energy Physics, Particle physics, Liquid scintillator, Neutrino oscillation, [SDU.ASTR.CO]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Physics::Instrumentation and Detectors, Solar neutrino, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Astrophysics, 01 natural sciences, 7. Clean energy, Neutrino Oscillations, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Nuclear physics, High Energy Physics - Phenomenology (hep-ph), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Nuclear Experiment (nucl-ex), Nuclear Experiment, 010306 general physics, Borexino, Physics, ICARUS, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], 010308 nuclear & particles physics, Astrophysics (astro-ph), High Energy Physics::Phenomenology, Solar neutrino problem, Low Background Detectors, Liquid Scintillators, 3. Good health, Solar Neutrinos, High Energy Physics - Phenomenology, Neutrino detector, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], Measurements of neutrino speed, High Energy Physics::Experiment, Neutrino
Abstract: This paper reports a direct measurement of the Be7 solar neutrino signal rate performed with the Borexino low background liquid scintillator detector. This is the first real-time spectral measurement of sub-MeV solar neutrinos. The result for 0.862 MeV Be7 is 47 +- 7 (stat} +- 12 (sys} counts/(day x 100 ton), consistent with predictions of Standard Solar Models and neutrino oscillations with LMA-MSW parameters., Paper submitted to PRLB. 9 pages, 6 figures (EPS) PDF files included into tar.gz file, together with LaTeX source, eps figs and style files
Published: 2008
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30. DarkSide-50, a background free experiment for dark matter searches

Author: P. Agnes, 1 T. Alexander, 2 A. Alton, 3 K. Arisaka, 4 H. O. Back, 5 B. Baldin, 6 K. Biery, 6 G. Bonfini, 7 M. Bossa, 8 A. Brigatti, 9 J. Brodsky, 5 F. Budano, 10 L. Cadonati, 2 F. Calaprice, 5 N. Canci, 4 A. Candela, 7 H. Cao, 5 M. Cariello, 11 P. Cavalcante, 7 A. Chavarria, 12 A. Chepurnov, 13 A. G. Cocco, 14 L. Crippa, 9 D. D’Angelo, 9 M. D’Incecco, 7 S. Davini, 15 M. De Deo, 7 A. Derbin, 16 A. Devoto, 17 F. Di Eusanio, 5 G. Di Pietro, 9 E. Edkins, 18 A. Empl, 15 A. Fan, 4 G. Fiorillo, 14 K. Fomenko, 19 G. Forster, 2 D. Franco, 1 F. Gabriele, 7 C. Galbiati, 5 A. Goretti, 5 L. Grandi, 12 M. Gromov, 13 M. Y. Guan, 20 Y. Guardincerri, 6 B. Hackett, 18 K. Herner, 6 E. V. Hungerford, 15 A.l. Ianni, 7 A.n. Ianni, 5 C. Jollet, 21 K. Keeter, 22 C. Kendziora, 6 S. Kidner, a. V. Kobychev, 24 G. Koh, 5 D. Korablev, 19 G. Korga, 15 A. Kurlej, 2 P. X. Li, 20 B. Loer, 5 P. Lombardi, 9 C. Love, 25 L. Ludhova, 9 S. Luitz, 26 Y. Q. Ma, 20 I. Machulin, 28 A. Mandarano, 10 J. Maricic, 18 L. Marini, 10 C. J. Martoff, 25 A. Meregaglia, 21 E. Meroni, 9 P. D. Meyers, 5 R. Milincic, 18 D. Montanari, 6 M. Montuschi, 7 M. E. Monzani, 26 P. Mosteiro, 5 B. Mount, 22 V. Muratova, 16 P. Musico, 11 A. Nelson, 5 S. Odrowski, 7 M. Okounkova, 5 M. Orsini, 7 F. Ortica, 29 L. Pagani, 11 M. Pallavicini, 11 E. Pantic, 4, 30 L. Papp, 23 S. Parmeggiano, 9 R. Parsells, 5 K. Pelczar, 31 N. Pelliccia, 29 S. Perasso, 1 A. Pocar, 2 S. Pordes, 6 D. Pugachev, 27 H. Qian, 5 K. Randle, 2 G. Ranucci, 9 A. Razeto, 7 B. Reinhold, 18 A. Renshaw, 4 A. Romani, 29 B. Rossi, 5, 14 N. Rossi, 7 S. D. Rountree, 23 D. Sablone, 15 P. Saggese, 7 R. Saldanha, 12 W. Sands, 5 S. Sangiorgio, 32 E. Segreto, 7 D. Semenov, 16 E. Shields, 5 M. Skorokhvatov, 28 O. Smirnov, 19 A. Sotnikov, 19 C. Stanford, 5 Y. Suvorov, 4 R. Tartaglia, 7 J. Tatarowicz, 25 G. Testera, 11 A. Tonazzo, 1 E. Unzhakov, 16 R. B. Vogelaar, 23 M. Wada, 5 S. Walker, 14 H. Wang, 4 Y. Wang, 20 A. Watson, 25 S. Westerdale, 5 M. Wojcik, 31 A. Wright, 5 X. Xiang, 5 J. Xu, 5 C. G. Yang, 20 J. Yoo, 6 S. Zavatarelli, 11 A. Zec, 2 C. Zhu, G. Zuzel31, MARI, Stefano Maria, P., Agne, 1 T., Alexander, 2 A., Alton, 3 K., Arisaka, 4 H. O., Back, 5 B., Baldin, 6 K., Biery, 6 G., Bonfini, 7 M., Bossa, 8 A., Brigatti, 9 J., Brodsky, 5 F., Budano, 10 L., Cadonati, 2 F., Calaprice, 5 N., Canci, 4 A., Candela, 7 H., Cao, 5 M., Cariello, 11 P., Cavalcante, 7 A., Chavarria, 12 A., Chepurnov, 13 A. G., Cocco, 14 L., Crippa, 9 D., D’Angelo, 9 M., D’Incecco, 7 S., Davini, 15 M., De Deo, 7 A., Derbin, 16 A., Devoto, 17 F., Di Eusanio, 5 G., Di Pietro, 9 E., Edkin, 18 A., Empl, 15 A., Fan, 4 G., Fiorillo, 14 K., Fomenko, 19 G., Forster, 2 D., Franco, 1 F., Gabriele, 7 C., Galbiati, 5 A., Goretti, 5 L., Grandi, 12 M., Gromov, 13 M. Y., Guan, 20 Y., Guardincerri, 6 B., Hackett, 18 K., Herner, 6 E. V., Hungerford, Ianni, 15 A. l., Ianni, 7 A. n., 5 C., Jollet, 21 K., Keeter, 22 C., Kendziora, 6 S., Kidner, a. V., Kobychev, 24 G., Koh, 5 D., Korablev, 19 G., Korga, 15 A., Kurlej, 2 P. X., Li, 20 B., Loer, 5 P., Lombardi, 9 C., Love, 25 L., Ludhova, 9 S., Luitz, 26 Y. Q., Ma, 20 I., Machulin, 28 A., Mandarano, Mari, Stefano Maria, 10 J., Maricic, 18 L., Marini, 10 C. J., Martoff, 25 A., Meregaglia, 21 E., Meroni, 9 P. D., Meyer, 5 R., Milincic, 18 D., Montanari, 6 M., Montuschi, 7 M. E., Monzani, 26 P., Mosteiro, 5 B., Mount, 22 V., Muratova, 16 P., Musico, 11 A., Nelson, 5 S., Odrowski, 7 M., Okounkova, 5 M., Orsini, 7 F., Ortica, 29 L., Pagani, 11 M., Pallavicini, 11 E., Pantic, 30 L., Papp, 23 S., Parmeggiano, 9 R., Parsell, 5 K., Pelczar, 31 N., Pelliccia, 29 S., Perasso, 1 A., Pocar, 2 S., Porde, 6 D., Pugachev, 27 H., Qian, 5 K., Randle, 2 G., Ranucci, 9 A., Razeto, 7 B., Reinhold, 18 A., Renshaw, 4 A., Romani, 29 B., Rossi, 14 N., Rossi, 7 S. D., Rountree, 23 D., Sablone, 15 P., Saggese, 7 R., Saldanha, 12 W., Sand, 5 S., Sangiorgio, 32 E., Segreto, 7 D., Semenov, 16 E., Shield, 5 M., Skorokhvatov, 28 O., Smirnov, 19 A., Sotnikov, 19 C., Stanford, 5 Y., Suvorov, 4 R., Tartaglia, 7 J., Tatarowicz, 25 G., Testera, 11 A., Tonazzo, 1 E., Unzhakov, 16 R. B., Vogelaar, 23 M., Wada, 5 S., Walker, 14 H., Wang, 4 Y., Wang, 20 A., Watson, 25 S., Westerdale, 5 M., Wojcik, 31 A., Wright, 5 X., Xiang, 5 J., Xu, 5 C. G., Yang, 20 J., Yoo, 6 S., Zavatarelli, 11 A., Zec, 2 C., Zhu, and G., Zuzel31
Subjects: Physics, Large Underground Xenon experiment, Physics::Instrumentation and Detectors, Hot dark matter, Dark matter, Scalar field dark matter, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Dark matter halo, Weakly interacting massive particles, Warm dark matter, Instrumentation, Light dark matter, Mathematical Physics
Abstract: The existence of dark matter is inferred from gravitational effects, but its nature remains a deep mystery. One possibility, motivated by considerations in elementary particle physics, is that dark matter consists of elementary particles, such as the hypothesized Weakly Interacting Massive Particles (WIMPs), with mass ~ 100 GeV and cross-section ~ 10−47 cm2, that can be gravitationally trapped inside our galaxy and revealed by their scattering on nuclei. It should be possible to detect WIMPs directly, as the orbital motion of the WIMPs composing the dark matter halo pervading the galaxy should result in WIMP-nucleus collisions of sufficient energy to be observable in the laboratory. The DarkSide-50 experiment is a direct WIMP search using a Liquid Argon Time Projection Chamber (LAr-TPC) with an active mass of 50 kg with a high sensitivity and an ultra-low background detector.
Published: 2014

31. First Results from the DarkSide-50 Dark Matter Experiment at Laboratori Nazionali del Gran Sasso

Author: P. Agnes, 1 T. Alexander, 2 A. Alton, 3 K. Arisaka, 4 H. O. Back, 5 B. Baldin, 6 K. Biery, 6 G. Bonfini, 7 M. Bossa, 8 A. Brigatti, 9 J. Brodsky, 5 F. Budano, 10 L. Cadonati, 2 F. Calaprice, 5 N. Canci, 4 A. Candela, 7 H. Cao, 5 M. Cariello, 11 P. Cavalcante, 7 A. Chavarria, 12 A. Chepurnov, 13 A. G. Cocco, 14 L. Crippa, 9 D. D’Angelo, 9 M. D’Incecco, 7 S. Davini, 15 M. De Deo, 7 A. Derbin, 16 A. Devoto, 17 F. Di Eusanio, 5 G. Di Pietro, 9 E. Edkins, 18 A. Empl, 15 A. Fan, 4 G. Fiorillo, 14 K. Fomenko, 19 G. Forster, 2 D. Franco, 1 F. Gabriele, 7 C. Galbiati, 5 A. Goretti, 5 L. Grandi, 12 M. Gromov, 13 M. Y. Guan, 20 Y. Guardincerri, 6 B. Hackett, 18 K. Herner, 6 E. V. Hungerford, 15 A.l. Ianni, 7 A.n. Ianni, 5 C. Jollet, 21 K. Keeter, 22 C. Kendziora, 6 S. Kidner, a. V. Kobychev, 24 G. Koh, 5 D. Korablev, 19 G. Korga, 15 A. Kurlej, 2 P. X. Li, 20 B. Loer, 5 P. Lombardi, 9 C. Love, 25 L. Ludhova, 9 S. Luitz, 26 Y. Q. Ma, 20 I. Machulin, 28 A. Mandarano, 10 J. Maricic, 18 L. Marini, 10 C. J. Martoff, 25 A. Meregaglia, 21 E. Meroni, 9 P. D. Meyers, 5 R. Milincic, 18 D. Montanari, 6 M. Montuschi, 7 M. E. Monzani, 26 P. Mosteiro, 5 B. Mount, 22 V. Muratova, 16 P. Musico, 11 A. Nelson, 5 S. Odrowski, 7 M. Okounkova, 5 M. Orsini, 7 F. Ortica, 29 L. Pagani, 11 M. Pallavicini, 11 E. Pantic, 4, 30 L. Papp, 23 S. Parmeggiano, 9 R. Parsells, 5 K. Pelczar, 31 N. Pelliccia, 29 S. Perasso, 1 A. Pocar, 2 S. Pordes, 6 D. Pugachev, 27 H. Qian, 5 K. Randle, 2 G. Ranucci, 9 A. Razeto, 7 B. Reinhold, 18 A. Renshaw, 4 A. Romani, 29 B. Rossi, 5, 14 N. Rossi, 7 S. D. Rountree, 23 D. Sablone, 15 P. Saggese, 7 R. Saldanha, 12 W. Sands, 5 S. Sangiorgio, 32 E. Segreto, 7 D. Semenov, 16 E. Shields, 5 M. Skorokhvatov, 28 O. Smirnov, 19 A. Sotnikov, 19 C. Stanford, 5 Y. Suvorov, 4 R. Tartaglia, 7 J. Tatarowicz, 25 G. Testera, 11 A. Tonazzo, 1 E. Unzhakov, 16 R. B. Vogelaar, 23 M. Wada, 5 S. Walker, 14 H. Wang, 4 Y. Wang, 20 A. Watson, 25 S. Westerdale, 5 M. Wojcik, 31 A. Wright, 5 X. Xiang, 5 J. Xu, 5 C. G. Yang, 20 J. Yoo, 6 S. Zavatarelli, 11 A. Zec, 2 C. Zhu, G. Zuzel 3, MARI, Stefano Maria, P. Agnes, P., Agne, 1 T., Alexander, 2 A., Alton, 3 K., Arisaka, 4 H. O., Back, 5 B., Baldin, 6 K., Biery, 6 G., Bonfini, 7 M., Bossa, 8 A., Brigatti, 9 J., Brodsky, 5 F., Budano, 10 L., Cadonati, 2 F., Calaprice, 5 N., Canci, 4 A., Candela, 7 H., Cao, 5 M., Cariello, 11 P., Cavalcante, 7 A., Chavarria, 12 A., Chepurnov, 13 A. G., Cocco, 14 L., Crippa, 9 D., D’Angelo, 9 M., D’Incecco, 7 S., Davini, 15 M., De Deo, 7 A., Derbin, 16 A., Devoto, 17 F., Di Eusanio, 5 G., Di Pietro, 9 E., Edkin, 18 A., Empl, 15 A., Fan, 4 G., Fiorillo, 14 K., Fomenko, 19 G., Forster, 2 D., Franco, 1 F., Gabriele, 7 C., Galbiati, 5 A., Goretti, 5 L., Grandi, 12 M., Gromov, 13 M. Y., Guan, 20 Y., Guardincerri, 6 B., Hackett, 18 K., Herner, 6 E. V., Hungerford, Ianni, 15 A. l., Ianni, 7 A. n., 5 C., Jollet, 21 K., Keeter, 22 C., Kendziora, 6 S., Kidner, a. V., Kobychev, 24 G., Koh, 5 D., Korablev, 19 G., Korga, 15 A., Kurlej, 2 P. X., Li, 20 B., Loer, 5 P., Lombardi, 9 C., Love, 25 L., Ludhova, 9 S., Luitz, 26 Y. Q., Ma, 20 I., Machulin, 28 A., Mandarano, Mari, Stefano Maria, 10 J., Maricic, 18 L., Marini, 10 C. J., Martoff, 25 A., Meregaglia, 21 E., Meroni, 9 P. D., Meyer, 5 R., Milincic, 18 D., Montanari, 6 M., Montuschi, 7 M. E., Monzani, 26 P., Mosteiro, 5 B., Mount, 22 V., Muratova, 16 P., Musico, 11 A., Nelson, 5 S., Odrowski, 7 M., Okounkova, 5 M., Orsini, 7 F., Ortica, 29 L., Pagani, 11 M., Pallavicini, 11 E., Pantic, 30 L., Papp, 23 S., Parmeggiano, 9 R., Parsell, 5 K., Pelczar, 31 N., Pelliccia, 29 S., Perasso, 1 A., Pocar, 2 S., Porde, 6 D., Pugachev, 27 H., Qian, 5 K., Randle, 2 G., Ranucci, 9 A., Razeto, 7 B., Reinhold, 18 A., Renshaw, 4 A., Romani, 29 B., Rossi, 14 N., Rossi, 7 S. D., Rountree, 23 D., Sablone, 15 P., Saggese, 7 R., Saldanha, 12 W., Sand, 5 S., Sangiorgio, 32 E., Segreto, 7 D., Semenov, 16 E., Shield, 5 M., Skorokhvatov, 28 O., Smirnov, 19 A., Sotnikov, 19 C., Stanford, 5 Y., Suvorov, 4 R., Tartaglia, 7 J., Tatarowicz, 25 G., Testera, 11 A., Tonazzo, 1 E., Unzhakov, 16 R. B., Vogelaar, 23 M., Wada, 5 S., Walker, 14 H., Wang, 4 Y., Wang, 20 A., Watson, 25 S., Westerdale, 5 M., Wojcik, 31 A., Wright, 5 X., Xiang, 5 J., Xu, 5 C. G., Yang, 20 J., Yoo, 6 S., Zavatarelli, 11 A., Zec, 2 C., Zhu, and G., Zuzel 3
Subjects: Physics::Instrumentation and Detectors, Astrophysics::Instrumentation and Methods for Astrophysics, High Energy Physics::Experiment, Astrophysics::Cosmology and Extragalactic Astrophysics, Nuclear Experiment
Abstract: We report the first results of DarkSide-50, a direct search for dark matter operating in the un- derground Laboratori Nazionali del Gran Sasso (LNGS) and searching for the rare nuclear recoils possibly induced by weakly interacting massive particles (WIMPs). The dark matter detector is a Liquid Argon Time Projection Chamber with a ( 46.4 0.7 ) kg active mass, operated inside a 30 t or- ganic liquid scintillator neutron veto, which is in turn installed at the center of a 1 kt water Cherenkov veto for the residual flux of cosmic rays. We report here the null results of a dark matter search for a ( 1422 67 ) kg d exposure with an atmospheric argon fill. This is the most sensitive dark matter search performed with an argon target, corresponding to a 90% CL upper limit on the WIMP-nucleon spin-independent cross section of 6.1 10
Published: 2014

32. The Electronics and Data Acquisition System of the DarkSide Dark Matter Search

Author: The DarkSide Collaboration, P. Agnes 1, T. Alexander 2, A. Alton 3, K. Arisaka 4, H. O. Back 5, B. Baldin 6, K. Biery 6, G. Bonfini 7, M. Bossa 8, A. Brigatti 9, J. Brodsky 5, F. Budano 10, L. Cadonati 2, F. Calaprice 5, N. Canci 4, A. Candela 7, H. Cao 5, M. Cariello 11, P. Cavalcante 7, A. Chavarria 12, A. Chepurnov 13, A. G. Cocco 14, L. Crippa 9, D. D’Angelo 9, M. D’Incecco 7, S. Davini 15, M. De Deo 7, A. Derbin 16, A. Devoto 17, F. Di Eusanio 5, G. Di Pieto 9, E. Edkins 18, A. Empl 15, A. Fan 4, G. Fiorillo 14, K. Fomenko 19, G. Forster 2, D. Franco 1, F. Gabriele 7, C. Galbiati 5, A. Goretti 5, L. Grandi 12, M. Gromov 13, M. Y. Guan 20, Y. Guardincerri 6, B. Hackett 18, K. Herner 6, E. Hungerford 15, A.l. Ianni 7, A.n. Ianni 5, C. Jollet 21, K. Keeter 22, C. Kendziora 6, S. Kidner 23, V. Kobychev 24, G. Koh 5, D. Korablev 19, G. Korga 15, A. Kurlej 2, P. X. Li 20, B. Loer 5, P. Lombardi 9, C. Love 25, L. Ludhova 9, S. Luitz 26, Y. Q. Ma 20, I. Machulin 27, A. Mandarano 10, J. Maricic 18, L. Marini 10, J. Martoff 25, A. Meregaglia 21, E. Meroni 9, P. D. Meyers 5, R. Milincic 18, D. Montanari 6, M. Montuschi 7, M. E. Monzani 26, P. Mosteiro 5, B. Mount 22, V. Muratova 16, P. Musico 11, A. Nelson 5, S. Odrowski 7, M. Okounkoa 5, M. Orsini 7, F. Ortica 19, L. Pagani 11, M. Pallavicini 11, E. Pantic 4, L. Papp 23, S. Parmeggiano 9, Bob Parsells 5, K. Pelczar 31, N. Pelliccia 29, S. Perasso 1, A. Pocar 2, S. Pordes 6, D. Pugachev 27, H. Qian 5, K. Randle 2, G. Ranucci 9, A. Razeto 7, B. Reinhold 18, A. Renshaw 4, A. Romani 29, B. Rossi 5, N. Rossi 7, S. D. Rountree 23, D. Sablone 15, P. Saggese 7, R. Saldanha 12, W. Sands 5, S. Sangiorgio 30, E. Segreto 7, D. Semenov 16, E. Shields 5, M. Skorokhvatov 27, O. Smirnov 19, A. Sotnikov 19, C. Stanford 5, Suvorov 4, R. Tartaglia 17, J. Tatarowicz 25, G. Testera 11, A. Tonazzo 1, E. Unzhakov 16, R. B. Vogelaar 23, M. Wada 5, S. E. Walker 14, H. Wang 4, Y. Wang 28, A. Watson 25, S. Westerdale 5, M. Wojcik 31, A. Wright 5, X. Xiang 5, J. Xu 5, C. G. Yang 20, J. Yoo 6, S. Zavatarelli 11, A. Zec 2, C. Zhu 5, G. Zuzel 31, MARI, Stefano Maria, P. Agnes, P.Agnes, The DarkSide, Collaboration, P., Agnes 1, T., Alexander 2, A., Alton 3, K., Arisaka 4, H. O., Back 5, B., Baldin 6, K., Biery 6, G., Bonfini 7, M., Bossa 8, A., Brigatti 9, J., Brodsky 5, F., Budano 10, L., Cadonati 2, F., Calaprice 5, N., Canci 4, A., Candela 7, H., Cao 5, M., Cariello 11, P., Cavalcante 7, A., Chavarria 12, A., Chepurnov 13, A. G., Cocco 14, L., Crippa 9, D., D’Angelo 9, M., D’Incecco 7, S., Davini 15, M., De Deo 7, A., Derbin 16, A., Devoto 17, F., Di Eusanio 5, G., Di Pieto 9, E., Edkins 18, A., Empl 15, A., Fan 4, G., Fiorillo 14, K., Fomenko 19, G., Forster 2, D., Franco 1, F., Gabriele 7, C., Galbiati 5, A., Goretti 5, L., Grandi 12, M., Gromov 13, M. Y., Guan 20, Y., Guardincerri 6, B., Hackett 18, K., Herner 6, E., Hungerford 15, Ianni 7, A. l., Ianni 5, A. n., C., Jollet 21, K., Keeter 22, C., Kendziora 6, S., Kidner 23, V., Kobychev 24, G., Koh 5, D., Korablev 19, G., Korga 15, A., Kurlej 2, P. X., Li 20, B., Loer 5, P., Lombardi 9, C., Love 25, L., Ludhova 9, S., Luitz 26, Y. Q., Ma 20, I., Machulin 27, A., Mandarano 10, Mari, Stefano Maria, J., Maricic 18, L., Marini 10, J., Martoff 25, A., Meregaglia 21, E., Meroni 9, P. D., Meyers 5, R., Milincic 18, D., Montanari 6, M., Montuschi 7, M. E., Monzani 26, P., Mosteiro 5, B., Mount 22, V., Muratova 16, P., Musico 11, A., Nelson 5, S., Odrowski 7, M., Okounkoa 5, M., Orsini 7, F., Ortica 19, L., Pagani 11, M., Pallavicini 11, E., Pantic 4, L., Papp 23, S., Parmeggiano 9, Bob Parsells, 5, K., Pelczar 31, N., Pelliccia 29, S., Perasso 1, A., Pocar 2, S., Pordes 6, D., Pugachev 27, H., Qian 5, K., Randle 2, G., Ranucci 9, A., Razeto 7, B., Reinhold 18, A., Renshaw 4, A., Romani 29, B., Rossi 5, N., Rossi 7, S. D., Rountree 23, D., Sablone 15, P., Saggese 7, R., Saldanha 12, W., Sands 5, S., Sangiorgio 30, E., Segreto 7, D., Semenov 16, E., Shields 5, M., Skorokhvatov 27, O., Smirnov 19, A., Sotnikov 19, C., Stanford 5, Suvorov, 4, R., Tartaglia 17, J., Tatarowicz 25, G., Testera 11, A., Tonazzo 1, E., Unzhakov 16, R. B., Vogelaar 23, M., Wada 5, S. E., Walker 14, H., Wang 4, Y., Wang 28, A., Watson 25, S., Westerdale 5, M., Wojcik 31, A., Wright 5, X., Xiang 5, J., Xu 5, C. G., Yang 20, J., Yoo 6, S., Zavatarelli 11, A., Zec 2, C., Zhu 5, and G., Zuzel 31
Abstract: It is generally inferred from astronomical measurements th at Dark Matter (DM) comprises approximately 27% of the energy-dens ity of the universe. If DM is a subatomic particle, a possible candidate is a Weakl y Interacting Mas- sive Particle (WIMP), and the DarkSide-50 (DS) experiment i s a direct search for evidence of WIMP-nuclear collisions. DS is located undergr ound at the Laboratori Nazionali del Gran Sasso (LNGS) in Italy, and consists of thr ee active, embedded components; an outer water veto (CTF), a liquid scintillato r veto (LSV), and a liquid argon (LAr) time projection chamber (TPC). This pap er describes the data acquisition and electronic systems of the DS detectors , designed to detect the residual ionization from s
Published: 2014

33. Recent results from Borexino

Author: G Testera, M Agostin, K Altenmüller, S Appel, G Bellini, J Benziger, D Bick, G Bonfini, D Bravo, B Caccianiga, F Calaprice, A Caminata, P Cavalcante, A Chepurnov, D D’Angelo, S Davini, A Derbin, L Di Noto, I Drachnev, A Etenko, K Fomenko, D Franco, F Gabriele, C Galbiati, C Ghiano, M Giammarchi, M Göger-Neff, A Goretti, M Gromov, C Hagner, E Hungerford, Aldo Ianni, Andrea Ianni, K Jedrzejczak, M Kaiser, V Kobychev, D Korablev, G Korga, D Kryn, M Laubenstein, B Lehnert, E Litvinovich, F Lombardi, P Lombardi, L Ludhova, G Lukyanchenko, I Machulin, S Manecki, W Maneschg, S Marcocci, E Meroni, M Meyer, L Miramonti, M Misiaszek, M Montuschi, P Mosteiro, V Muratova, B Neumair, L Oberauer, M Obolensky, F Ortica, M Pallavicini, L Papp, L Perasso, A Pocar, G Ranucci, A Razeto, A Re, A Romani, R Roncin, N Rossi, S Schönert, D Semenov, H Simgen, M Skorokhvatov, O Smirnov, A Sotnikov, S Sukhotin, Y Suvorov, R Tartaglia, J Thurn, M Toropova, E Unzhakov, A Vishneva, RB Vogelaar, F von Feilitzsch, H Wang, S Weinz, J Winter, M Wojcik, M Wurm, Z Yokley, O Zaimidoroga, S Zavatarelli, K Zuber, G Zuzel, AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)
Subjects: History, neutrino: solar, 010308 nuclear & particles physics, Physics::Instrumentation and Detectors, energy spectrum, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Computer Science Applications, Education, Physics and Astronomy (all), 0103 physical sciences, charge: conservation law, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Borexino, 010306 general physics, experimental results, energy: low
Abstract: International audience; We review the solar neutrinos results of Borexino and the limit on the charge conservation obtained in the context of the analysis of the low energy region of the energy spectrum.
Published: 2016
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34. Oxygen contamination in liquid Argon: combined effects on ionization electron charge and scintillation light

Author: R Acciarri, M Antonello, B Baibussinov, M Baldo-Ceolin, P Benetti, F Calaprice, E Calligarich, M Cambiaghi, N Canci, F Carbonara, F Cavanna, S Centro, A G Cocco, F Di Pompeo, G Fiorillo, C Galbiati, V Gallo, L Grandi, G Meng, I Modena, C Montanari, O Palamara, L Pandola, G B Piano Mortari, F Pietropaolo, G L Raselli, M Roncadelli, M Rossella, C Rubbia, E Segreto, A M Szelc, F Tortorici, S Ventura, C Vignoli, R., Acciarri, M., Antonello, B., Baibussinov, M., Baldo Ceolin, P., Benetti, F., Calaprice, E., Calligarich, M., Cambiaghi, N., Canci, F., Carbonara, F., Cavanna, S., Centro, A. G., Cocco, F. D., Pompeo, Fiorillo, Giuliana, C., Galbiati, V., Gallo, L., Grandi, G., Meng, I., Modena, C., Montanari, O., Palamara, L., Pandola, G. B., P., F., Pietropaolo, G. L., Raselli, M., Roncadelli, M., Rossella, C., Rubbia, E., Segreto, A. M., Szelc, F., Tortorici, S., Ventura, and C., Vignoli
Subjects: Quenching, Physics, Scintillation, Range (particle radiation), Argon, Detector, Analytical chemistry, chemistry.chemical_element, FOS: Physical sciences, Oxygen, NITROGEN, XENON, Nuclear Experiment, Instrumentation, Mathematical Physics, KRYPTON, chemistry, YIELDS, DEPENDENCE, Ionization, LUMINESCENCE, PARTICLES, Light emission, Nuclear Experiment (nucl-ex)
Abstract: A dedicated test of the effects of Oxygen contamination in liquid Argon has been performed at the INFN-Gran Sasso Laboratory (LNGS, Italy) within the WArP R&D program. Two detectors have been used: the WArP 2.3 lt prototype and a small (0.7 lt) dedicated detector, coupled with a system for the injection of controlled amounts of gaseous Oxygen. O(2) contamination in LAr leads to depletion of both the free electron charge (via attachment process) and the scintillation light (via quenching and absorption mechanisms) available for ionization signal detection. Purpose of the test with the 0.7 lt detector was to detect the reduction of the long-lived component lifetime of the Argon scintillation light emission and of the overall light yield at increasing O(2) concentration. Data from the WArP prototype were used for determining the behavior of both the ionization electron lifetime and the scintillation long-lived component lifetime at decreasing O(2) concentration by the purification process activated in closed loop during the acquisition run. The electron lifetime measurements allowed to infer the O(2) content of the Argon and correlate it with the long-lived scintillation lifetime data. The effects of Oxygen contamination on the scintillation light have been thus extensively measured over a wide range of O(2) concentration, spanning from similar to 10(-3) ppm up to similar to 10 ppm.
Published: 2010

35. DarkSide-50 : a WIMP search with a two-phase argon TPC

Author: P.D. Meyers, P. Agnes, D. Alton, K. Arisaka, H.O. Back, B. Baldin, K. Biery, G. Bonfini, M. Bossa, A. Brigatti, J. Brodsky, F. Budano, L. Cadonati, F. Calaprice, N. Canci, A. Candela, H. Cao, M. Cariello, P. Cavalcante, A. Chavarria, A. Chepurnov, A.G. Cocco, L. Crippa, D. DAngelo, M. D’Incecco, S. Davini, M. De Deo, A. Derbin, F. Di Eusanio, G. Di Pietro, E. Edkins, A. Empl, A. Fan, G. Fiorillo, K. Fomenko, G. Forster, D. Franco, F. Gabriele, C. Galbiati, A. Goretti, L. Grandi, M. Gromov, M. Guan, Y. Guardincerri, B. Hackett, K. Herner, P. Humble, E.V. Hungerford, Al. Ianni, An. Ianni, C. Joliet, K. Keeter, C. Kendziora, S. Kidner, V. Kobychev, G. Koh, D. Korablev, G. Korga, A. Kurlej, P. Li, B. Loer, P. Lombardi, C. Love, L. Ludhova, S. Luitz, Y. Ma, I. Machulin, A. Mandarano, S. Mari, J. Maricic, C.J. Martoff, A. Meregaglia, E. Meroni, R. Milincic, D. Montanari, M. Montuschi, M.E. Monzani, P. Mosteiro, B. Mount, V. Muratova, P. Musico, A. Nelson, M. Okounkova, M. Orsini, F. Ortica, L. Pagani, M. Pallavicini, E. Pantic, L. Papp, S. Parmeggiano, R. Parsells, K. Pelczar, N. Pelliccia, S. Perasso, F. Perfetto, A. Pocar, S. Pordes, H. Qian, K. Randle, G. Ranucci, A. Razeto, B. Reinhold, A. Romani, B. Rossi, N. Rossi, S.D. Rountree, D. Sablone, P. Saggese, R. Saldanha, W. Sands, E. Segreto, D. Semenov, E. Shields, M. Skorokhvatov, O. Smirnov, A. Sotnikov, Y. Suvarov, R. Tartaglia, J. Tatarowicz, G. Testera, A. Tonazzo, E. Unzhakov, R.B. Vogelaar, M. Wada, H. Wang, Y. Wang, A. Watson, R. Westerdale, M. Wojcik, A. Wright, J. Xu, C. Yang, J. Yoo, S. Zavatarelli, G. Zuzel, Agnes, P., Alton, D., Arisaka, K., Back, H. O., Baldin, B., Biery, K., Bonfini, G., Bossa, M., Brigatti, A., Brodsky, J., Budano, F., Cadonati, L., Calaprice, F., Canci, N., Candela, A., Cao, H., Cariello, M., Cavalcante, P., Chavarria, A., Chepurnov, A., Cocco, A. G., Crippa, L., Dangelo, D., D’Incecco, M., Davini, S., De Deo, M., Derbin, A., Di Eusanio, F., Di Pietro, G., Edkins, E., Empl, A., Fan, A., Fiorillo, Giuliana, Fomenko, K., Forster, G., Franco, D., Gabriele, F., Galbiati, C., Goretti, A., Grandi, L., Gromov, M., Guan, M., Guardincerri, Y., Hackett, B., Herner, K., Humble, P., Hungerford, E. V., Ianni, A., Joliet, C., Keeter, K., Kendziora, C., Kidner, S., Kobychev, V., Koh, G., Korablev, D., Korga, G., Kurlej, A., Li, P., Loer, B., Lombardi, P., Love, C., Ludhova, L., Luitz, S., Ma, Y., Machulin, I., Mandarano, A., Mari, S., Maricic, J., Martoff, C. J., Meregaglia, A., Meroni, E., Meyers, P. D., Milincic, R., Montanari, D., Montuschi, M., Monzani, M. E., Mosteiro, P., Mount, B., Muratova, V., Musico, P., Nelson, A., Okounkova, M., Orsini, M., Ortica, F., Pagani, L., Pallavicini, M., Pantic, E., Papp, L., Parmeggiano, S., Parsells, R., Pelczar, K., Pelliccia, N., Perasso, S., Perfetto, F., Pocar, A., Pordes, S., Qian, H., Randle, K., Ranucci, G., Razeto, A., Reinhold, B., Romani, A., Rossi, B., Rossi, N., Rountree, S. D., Sablone, D., Saggese, P., Saldanha, R., Sands, W., Segreto, E., Semenov, D., Shields, E., Skorokhvatov, M., Smirnov, O., Sotnikov, A., Suvarov, Y., Tartaglia, R., Tatarowicz, J., Testera, G., Tonazzo, A., Unzhakov, E., Vogelaar, R. B., Wada, M., Wang, H., Wang, Y., Watson, A., Westerdale, R., Wojcik, M., Wright, A., Xu, J., Yang, C., Yoo, J., Zavatarelli, S., Zuzel, G., Mari, Stefano Maria, and The Darkside, Collaboration
Subjects: Physics, Cryostat, Argon, Time projection chamber, chemistry.chemical_element, WIMP Argon Programme, Scintillator, Physics and Astronomy(all), Nuclear physics, Physics and Astronomy (all), chemistry, WIMP, pacs:95.35.+d, 29.40.Mc, Neutron, Cherenkov radiation
Abstract: DarkSide-50 is a two phase argon TPC for direct dark matter detection which is installed at the Gran Sasso underground laboratory, Italy. DarkSide-50 has a 50-kg active volume and will make use of underground argon low in 39 Ar. The TPC is installed inside an active neutron veto made with boron-loaded high radiopurity liquid scintillator. The neutron veto is installed inside a 1000 m 3 water Cherenkov muon veto. The DarkSide-50 TPC and cryostat are assembled in two radon-free clean rooms to reduce radioactive contaminants. The overall design aims for a background free exposure after selection cuts are applied. The expected sensitivity for WIMP-nucleon cross section is of the order of 10 −45 cm 2 for WIMP masses around 100 GeV/c 2 . The commissioning and performance of the detector are described. Details of the low-radioactivity underground argon and other unique features of the projects are reported.
Published: 2015

36. Antineutrino geophysics with liquid scintillator detectors

Author: Casey Rothschild, F. Calaprice, and M. L. Chen
Subjects: Physics, business.industry, FOS: Physical sciences, chemistry.chemical_element, Thorium, Crust, Geophysics, Uranium, Nuclear power, Scintillator, Mantle (geology), High Energy Physics - Experiment, Geophysics (physics.geo-ph), Physics - Geophysics, High Energy Physics - Experiment (hep-ex), chemistry, Neutrino detector, General Earth and Planetary Sciences, Nuclear Experiment (nucl-ex), business, Nuclear Experiment, Radioactive decay
Abstract: Detecting the antineutrinos emitted by the decay of radioactive elements in the mantle and crust could provide a direct measurement of the total abundance of uranium and thorium in the Earth. In calculating the antineutrino flux at specific sites, the local geology of the crust and the background from the world's nuclear power reactors are important considerations. Employing a global crustal map, with type and thickness data, and using recent estimates of the uranium and thorium distribution in the Earth, we calculate the antineutrino event rate for two new neutrino detectors. We show that spectral features allow terrestrial antineutrino events to be identified above reactor antineutrino backgrounds and that the uranium and thorium contributions can be separately determined., Comment: Published paper differs from original submitted preprint because reviewers suggested updated continental crust U/Th abundances. Kamioka geographical location error was in preprint, partially corrected in published version. This version is the same as the published paper, with Kamioka fully corrected. Because of recent interest in this topic, this version is being made available, despite this work being 8 years old
Published: 1998
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37. Cosmogenic Backgrounds in Borexino at 3800 m water-equivalent depth

Author: L. Oberauer, V. N. Muratova, A. E. Chavarria, L. Perasso, A.V. Etenko, D. Bravo, C. Salvo, O. Zaimidoroga, Michael Wurm, L. Grandi, M. Göger-Neff, R. Möllenberg, S. Perasso, R. Tartaglia, S. V. Sukhotin, Laura Cadonati, G. Korga, Andrea Ianni, A. Wright, Jilei Xu, Y. Suvorov, D. Franco, G. Zuzel, Livia Ludhova, G. Testera, Fausto Ortica, A. M. Goretti, V. V. Kobychev, A. S. Chepurnov, A. V. Derbin, K. Otis, I. Machulin, A. Sotnikov, Aldo Ianni, Gioacchino Ranucci, A. Empl, Stefan Schönert, G. Bonfini, P. Cavalcante, S. Davini, Q. Meindl, C. Ghiano, M. Obolensky, W. Maneschg, G. Lukyanchenko, R. Saldanha, P. J. Mosteiro, E. Litvinovich, S. Manecki, G. Bellini, K. Fomenko, F. von Feilitzsch, B. Caccianiga, D. Bick, Sandra Zavatarelli, Marco Giammarchi, J. Winter, Aldo Romani, L. Papp, F. Calaprice, Lino Miramonti, S. Gazzana, Cristiano Galbiati, Oleg Smirnov, N. Rossi, A. Pocar, Caren Hagner, D. Vignaud, Marco Pallavicini, D. D'Angelo, D. Korablev, T. Lewke, E. Hungerford, M. Misiaszek, M. Skorokhvatov, Marcin Wójcik, M. Buizza Avanzini, R. B. Vogelaar, Hardy Simgen, Paolo Lombardi, Alessandra Re, Matthias Laubenstein, A. Razeto, G. Manuzio, D. Kryn, B. Loer, J. Benziger, F. Lombardi, E. Meroni, Physics Department, Amherst U., University of Massachusetts System (UMASS), APC - Neutrinos, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC)-AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), AstroParticule et Cosmologie (APC (UMR_7164)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Laboratori Nazionali del Gran Sasso (LNGS), Istituto Nazionale di Fisica Nucleare (INFN), Laboratoire Kastler Brossel (LKB (Jussieu)), Université Pierre et Marie Curie - Paris 6 (UPMC)-Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Dept. Microelectronics and Nanoscience, Chalmers University of Technology [Göteborg], departement de physique, Albert-Ludwigs-Universität Freiburg, Dip. di Fisica dell'Università di Genova - Italy, Università degli studi di Torino (UNITO), Departamento de Engenharia Elétrica [Minas Gerais] (DEE - UFMG), Universidade Federal de Minas Gerais, Rhodes University, Grahamstown, Laboratoire de Spectroscopie Hertzienne de l'ENS (LSH-ENS), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Institute of Physics, Polish Academy of Sciences, Polska Akademia Nauk = Polish Academy of Sciences (PAN), International Iberian Nanotechnology Laboratory (INL), Bellini, G., Suvorov, Y., Et, Al., Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-AstroParticule et Cosmologie (APC (UMR_7164)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Università degli studi di Genova = University of Genoa (UniGe), and Università degli studi di Torino = University of Turin (UNITO)
Subjects: Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, Solar neutrino, Monte Carlo method, dark matter experiment, cosmic ray experiment, FOS: Physical sciences, Scintillator, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), neutrino experiments, 0103 physical sciences, Neutron, 010306 general physics, Borexino, ComputingMilieux_MISCELLANEOUS, Physics, [PHYS]Physics [physics], Muon, 010308 nuclear & particles physics, dark matter experiments, Astronomy and Astrophysics, Instrumentation and Detectors (physics.ins-det), Neutron capture, Neutrino detector, neutrino experiment, High Energy Physics::Experiment, cosmic ray experiments, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract: The solar neutrino experiment Borexino, which is located in the Gran Sasso underground laboratories, is in a unique position to study muon-induced backgrounds in an organic liquid scintillator. In this study, a large sample of cosmic muons is identified and tracked by a muon veto detector external to the liquid scintillator, and by the specific light patterns observed when muons cross the scintillator volume. The yield of muon-induced neutrons is found to be Yn =(3.10+-0.11)10-4 n/({\mu} (g/cm2)). The distance profile between the parent muon track and the neutron capture point has the average value {\lambda} = (81.5 +- 2.7)cm. Additionally the yields of a number of cosmogenic radioisotopes are measured for 12N, 12B, 8He, 9C, 9Li, 8B, 6He, 8Li, 11Be, 10C and 11C. All results are compared with Monte Carlo simulation predictions using the Fluka and Geant4 packages. General agreement between data and simulation is observed for the cosmogenic production yields with a few exceptions, the most prominent case being 11C yield for which both codes return about 50% lower values. The predicted {\mu}-n distance profile and the neutron multiplicity distribution are found to be overall consistent with data., Comment: 26 pages, 13 figures (in 14 files), 4 tables. 3 extra data files. accepted by JCAP
Published: 2013
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38. Lifetime measurements of 214Po and 212Po with the CTF liquid scintillator detector at LNGS

Author: R. B. Vogelaar, Alessandra Re, Matthias Laubenstein, C. Carraro, P. Cavalcante, W. Maneschg, A. Razeto, G. Manuzio, J. Benziger, Michael Wurm, L. Grandi, A. Pocar, V. Chubakov, M. Skorokhvatov, F. Lombardi, D. Korablev, D. Bick, Sandra Zavatarelli, F. von Feilitzsch, Fabio Mantovani, S. Perasso, S. Davini, S. Nisi, G. Zuzel, L. Oberauer, R. Saldanha, S. Manecki, M. Buizza Avanzini, V. N. Muratova, A. E. Chavarria, G. Testera, Hardy Simgen, L. Perasso, A. Sotnikov, Aldo Ianni, Marco Giammarchi, Y. Suvorov, Q. Meindl, A.V. Etenko, Gioacchino Ranucci, D. Kryn, D. Franco, D. Bravo, Aldo Romani, L. Papp, Laura Cadonati, E. Meroni, N. Rossi, Fausto Ortica, I. Machulin, Marco Pallavicini, D. D'Angelo, C. Salvo, O. Zaimidoroga, B. Loer, Yusuke Koshio, Andrea Ianni, M. Obolensky, A. V. Derbin, M. M. Wojcik, Cristiano Galbiati, Oleg Smirnov, G. Bellini, Paolo Lombardi, M. Göger-Neff, E. Guardincerri, S. V. Sukhotin, A. Wright, D. Montanari, V. V. Kobychev, Stefan Schönert, Livia Ludhova, A. A. Sabelnikov, A. M. Goretti, A. S. Chepurnov, S. Hardy, Marcello Lissia, C. Ghiano, Jilei Xu, K. Otis, P. J. Mosteiro, G. Bonfini, Lino Miramonti, T. Lewke, R. Tartaglia, G. Korga, E. Litvinovich, K. Fomenko, S. Gazzana, B. Caccianiga, F. Calaprice, J. Winter, Gerti Xhixha, M. Misiaszek, Borexino Collaboration, Physics Department, University of Massachusetts System (UMASS), AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Physique Corpusculaire et Cosmologie - Collège de France (PCC), Collège de France (CdF (institution))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratori Nazionali del Gran Sasso (LNGS), Istituto Nazionale di Fisica Nucleare (INFN), Dept. Microelectronics and Nanoscience, Chalmers University of Technology [Göteborg], Paul Scherrer Institute (PSI), Rhodes University, Grahamstown, Laboratoire de Spectroscopie Hertzienne de l'ENS (LSH-ENS), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), International Iberian Nanotechnology Laboratory (INL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), École normale supérieure - Paris (ENS-PSL), Bellini, G., Suvorov, Y., and Et, Al.
Subjects: Nuclear and High Energy Physics, Physics - Instrumentation and Detectors, Nuclear Theory, Hadron, FOS: Physical sciences, Scintillator, 01 natural sciences, Coincidence, Nuclear Theory (nucl-th), Nuclear physics, High Energy Physics - Phenomenology (hep-ph), 0103 physical sciences, Nuclear fusion, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, Nuclear theory, ComputingMilieux_MISCELLANEOUS, Physics, [PHYS]Physics [physics], Test facility, 010308 nuclear & particles physics, Detector, Instrumentation and Detectors (physics.ins-det), High Energy Physics - Phenomenology, National laboratory, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract: We have studied the alpha decays of 214Po into 210Pb and of 212Po into 208Pb tagged by the coincidence with the preceding beta decays from 214Bi and 212Bi, respectively. The employed 222Rn, 232Th, and 220Rn sources were sealed inside quartz vials and inserted in the Counting Test Facility at the underground Gran Sasso National Laboratory in Italy. We find that the mean lifetime of 214Po is (236.00 +- 0.42(stat) +- 0.15(syst)) \mu s and that of 212Po is (425.1 +- 0.9(stat) +- 1.2(syst)) ns. Our results, obtained from data with signal-to-background ratio larger than 1000, reduce the overall uncertainties and are compatible with previous measurements., Comment: RevTex, 11 pages, 5 figures, 3 tables. This second version matches the one accepted for publication in EPJA: minor stylistic changes plus a discussion of calibration of TDC time scale
Published: 2013
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39. Borexino calibrations: Hardware, Methods, and Results

Author: Cristiano Galbiati, A. Razeto, E. Litvinovich, R. Saldanha, F. von Feilitzsch, B. Caccianiga, S. Gazzana, F. Calaprice, Marco Giammarchi, D. Vignaud, Laura Cadonati, Livia Ludhova, A. Kayunov, Jilei Xu, T. Lewke, Fausto Ortica, Y. Suvorov, I. Machulin, G. Zuzel, L. Oberauer, P. Cavalcante, R. Tartaglia, K. Otis, S. Kidner, M. Obolensky, A. E. Chavarria, W. Maneschg, M. Goeger-Neff, M. Skorokhvatov, A. Sotnikov, Aldo Ianni, L. Perasso, R. B. Vogelaar, Matthias Laubenstein, V. Muratova, P. J. Mosteiro, A.V. Etenko, Michael Wurm, L. Grandi, Lino Miramonti, Alessandra Re, D. Franco, S. V. Sukhotin, G. Korga, Andrea Ianni, D. Bravo, D. Bick, Sandra Zavatarelli, A. Wright, V. V. Kobychev, A. Pocar, Stefan Schönert, D. Rountree, A. Derbin, R. S. Raghavan, A. Goretti, D. Korablev, D. Kryn, G. Bonfini, C. Ghiano, N. Rossi, E. Meroni, Paolo Lombardi, G. Bellini, Marco Pallavicini, D. D'Angelo, C. Salvo, Marcin Wójcik, S. Manecki, M. Buizza Avanzini, S. Hardy, O. Zaimidoroga, K. Fomenko, Hardy Simgen, S. Davini, J. Benziger, F. Lombardi, Gioacchino Ranucci, C. Carraro, D. Montanari, G. Fernandes, S. Perasso, Q. Meindl, Aldo Romani, L. Papp, E. Guardincerri, G. Manuzio, G. Testera, A. A. Sabelnikov, J. Winter, M. Misiaszek, O. Smirnov, H. O. Back, B. Loer, Yusuke Koshio, Borexino collaboration, H, Back, G, Bellini, Suvorov, Yury, and Et, Al.
Subjects: Calorimeter, Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, Solar neutrino, Detector, Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), Scintillator, Large detector systems for particle and astroparticle physic, Calibration, Environmental science, Neutrino, Instrumentation, Borexino, Mathematical Physics, Remote sensing
Abstract: Borexino was the first experiment to detect solar neutrinos in real-time in the sub-MeV region. In order to achieve high precision in the determination of neutrino rates, the detector design includes an internal and an external calibration system. This paper describes both calibration systems and the calibration campaigns that were carried out in the period between 2008 and 2011. We discuss some of the results and show that the calibration procedures preserved the radiopurity of the scintillator. The calibrations provided a detailed understanding of the detector response and led to a significant reduction of the systematic uncertainties in the Borexino measurements.
Published: 2012

40. Cosmic-muon flux and annual modulation in Borexino at 3800 m water-equivalent depth

Author: Jilei Xu, R. Tartaglia, K. Otis, D. Vignaud, G. Testera, C. Carraro, A. Sotnikov, Aldo Ianni, Caren Hagner, G. Zuzel, P. J. Mosteiro, T. Lewke, L. Oberauer, J. Benziger, V. N. Muratova, P. Cavalcante, A. Razeto, A. E. Chavarria, G. Manuzio, S. Manecki, W. Maneschg, L. Perasso, Gioacchino Ranucci, C. Ghiano, F. Lombardi, S. Davini, M. Misiaszek, Cristiano Galbiati, Y. Suvorov, A. Pocar, Michael Wurm, L. Grandi, B. Loer, M. Skorokhvatov, Yusuke Koshio, H. Simgen, Oleg Smirnov, D. Korablev, D. Kryn, C. Salvo, Matthias Laubenstein, G. Bonfini, M. Buizza Avanzini, E. Litvinovich, K. Fomenko, E. Guardincerri, F. von Feilitzsch, J. Winter, R. Saldanha, D. Montanari, R. S. Raghavan, Paolo Lombardi, B. Caccianiga, S. Gazzana, O. Zaimidoroga, A.V. Etenko, S. Hardy, S. V. Sukhotin, F. Calaprice, Laura Cadonati, Marco Giammarchi, D. Bravo, R. B. Vogelaar, Lino Miramonti, A. Wright, M. Goeger-Neff, E. Meroni, Alessandra Re, Fausto Ortica, I. Machulin, Stefan Schönert, D. Franco, G. Bellini, M. Obolensky, Livia Ludhova, A. A. Sabelnikov, A. M. Goretti, A. S. Chepurnov, Andrea Ianni, D. Bick, A. V. Derbin, Sandra Zavatarelli, M. M. Wojcik, S. Perasso, Q. Meindl, Aldo Romani, L. Papp, Marco Pallavicini, D. D'Angelo, G. Korga, AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Borexino, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), APC - Neutrinos, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-AstroParticule et Cosmologie (APC (UMR_7164)), PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, Bellini, G., Suvorov, Y., and Et, Al.
Subjects: Particle physics, [PHYS.ASTR.IM]Physics [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM], FOS: Physical sciences, Water equivalent, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], 010306 general physics, Instrumentation and Methods for Astrophysics (astro-ph.IM), Relative amplitude, Borexino, Physics, [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph], COSMIC cancer database, Muon, 010308 nuclear & particles physics, Astronomy and Astrophysics, Atmospheric temperature, [SDU.ASTR.IM]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM], Physics - Atmospheric and Oceanic Physics, neutrino detector, 13. Climate action, Modulation, Atmospheric and Oceanic Physics (physics.ao-ph), Muon flux, neutrino experiment, Astrophysics - Instrumentation and Methods for Astrophysics
Abstract: We have measured the muon flux at the underground Gran Sasso National Laboratory (3800 m w.e.) to be (3.41 \pm 0.01) \times 10-4m-2s-1 using four years of Borexino data. A modulation of this signal is observed with a period of (366\pm3) days and a relative amplitude of (1.29 \pm 0.07)%. The measured phase is (179 \pm 6) days, corresponding to a maximum on the 28th of June. Using the most complete atmospheric data models available, muon rate fluctuations are shown to be positively correlated with atmospheric temperature, with an effective coefficient {\alpha}T = 0.93 \pm 0.04. This result represents the most precise study of the muon flux modulation for this site and is in good agreement with expectations., Comment: 14 pages, 8 figures, published on JCAP as JCAP05(2012)015 on May 15th 2012
Published: 2012
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41. First evidence of pep solar neutrinos by direct detection in Borexino

Author: A.V. Etenko, A. Pocar, D. Bravo, R. Tartaglia, Livia Ludhova, Denis Korablev, A. S. Chepurnov, A. Razeto, S. Davini, S. Schönert, Marcin Wójcik, G. Manuzio, B. Loer, R. S. Raghavan, C. Ghiano, G. Zuzel, R. B. Vogelaar, M. Obolensky, R. Saldanha, Yusuke Koshio, M. Goeger-Neff, K. Otis, Y. Suvorov, D. Montanari, Alessandra Re, L. Oberauer, A. A. Sabelnikov, P. Cavalcante, A. Derbin, M. Misiaszek, A. E. Chavarria, L. Perasso, Aldo Ianni, Marco Giammarchi, A. Sotnikov, E. Litvinovich, E. Meroni, F. Lombardi, V. Muratova, B. Caccianiga, P. J. Mosteiro, J. Benziger, Andrea Ianni, F. Calaprice, D. Bick, Sandra Zavatarelli, C. Salvo, O. Zaimidoroga, A. Goretti, E. Guardincerri, O. Smirnov, G. Testera, S. Manecki, Aldo Romani, L. Papp, Paolo Lombardi, J. Winter, S. Perasso, S. V. Sukhotin, Gioacchino Ranucci, A. Wright, Jingke Xu, Cristiano Galbiati, G. Bellini, S. Hardy, M. Skorokhvatov, Matthias Laubenstein, J. Quirk, T. Lewke, D. Kryn, Marco Pallavicini, D. D'Angelo, Stefano Bonetti, K. Fomenko, S. Gazzana, Michael Wurm, L. Grandi, Q. Meindl, F. von Feilitzsch, W. Maneschg, Laura Cadonati, Fausto Ortica, I. Machulin, Lino Miramonti, D. Vignaud, G. Korga, D. Franco, G. Bonfini, M. Buizza Avanzini, Hardy Simgen, C. Carraro, Bellini, G., Suvorov, Y., Et, Al., APC - Neutrinos, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-AstroParticule et Cosmologie (APC (UMR_7164)), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), AstroParticule et Cosmologie (APC (UMR_7164)), Borexino, Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC)-AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)
Subjects: History, Metallicity, Solar neutrino, Astrophysics::High Energy Astrophysical Phenomena, Solar neutrinos, General Physics and Astronomy, FOS: Physical sciences, Astrophysics, 01 natural sciences, Main-sequence: late-type stars, Education, High Energy Physics - Experiment, 26.65.+t, 14.60.Lm, 95.55.Vj, 97.20.Jg, Nuclear physics, Physics and Astronomy (all), High Energy Physics - Experiment (hep-ex), Ordinary neutrinos (nuW bosons, muon, 0103 physical sciences, Neutrino, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Astrophysics::Solar and Stellar Astrophysics, 010306 general physics, Neutrino oscillation, Borexino, Solar and Stellar Astrophysics (astro-ph.SR), Physics, Range (particle radiation), Standard solar model, Muon, 010308 nuclear & particles physics, [SDU.ASTR.SR]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR], High Energy Physics::Phenomenology, pion, cosmic ray detectors, [PHYS.ASTR.SR]Physics [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR], and other elementary particle detectors, Computer Science Applications, 3. Good health, Astrophysics - Solar and Stellar Astrophysics, 13. Climate action, Physics::Space Physics, High Energy Physics::Experiment
Abstract: We observed, for the first time, solar neutrinos in the 1.0-1.5 MeV energy range. We measured the rate of pep solar neutrino interactions in Borexino to be [3.1+-0.6(stat)+-0.3(syst)] counts/(day x 100 ton) and provided a constraint on the CNO solar neutrino interaction rate of, Submitted to Physical Review Letters (2011)
Published: 2011
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42. Borexino: recent results, detector calibration and future perspectives

Author: Marco Pallavicini, G. Bellini, J. Benziger, S. Bonetti, M. Buizza Avanzini, B. Caccianiga, L. Cadonati, F. Calaprice, C. Carraro, A. Chavarria, F. Dalnoki-Veress, D. DʼAngelo, S. Davini, H. de Kerret, A. Derbin, A. Etenko, F. von Feilitzsch, K. Fomenko, D. Franco, C. Galbiati, S. Gazzana, C. Ghiano, M. Giammarchi, M. Goeger-Neff, A. Goretti, E. Guardincerri, S. Hardy, Aldo Ianni, Andrea Ianni, M. Joyce, V. Kobychev, Y. Koshio, G. Korga, D. Kryn, M. Laubenstein, M. Leung, T. Lewke, E. Litvinovich, B. Loer, F. Lombardi, P. Lombardi, L. Ludhova, I. Machulin, S. Manecki, W. Maneschg, G. Manuzio, Q. Meindl, E. Meroni, L. Miramonti, M. Misiaszek, D. Montanari, V. Muratova, L. Oberauer, M. Obolensky, F. Ortica, M. Pallavicini, L. Papp, L. Perasso, S. Perasso, A. Pocar, R.S. Raghavan, G. Ranucci, A. Razeto, A. Re, P. Risso, A. Romani, D. Rountree, A. Sabelnikov, R. Saldanha, C. Salvo, S. Schönert, H. Simgen, M. Skorokhvatov, O. Smirnov, A. Sotnikov, S. Sukhotin, Y. Suvorov, R. Tartaglia, G. Testera, D. Vignaud, R.B. Vogelaar, J. Winter, M. Wojcik, M. Wurm, A. Wright, J. Xu, O. Zaimidoroga, S. Zavatarelli, and G. Zuzel
Subjects: Physics, Nuclear and High Energy Physics, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Solar neutrino, Detector, Scintillator, Solar neutrino problem, Atomic and Molecular Physics, and Optics, Physics::Geophysics, Nuclear physics, Neutrino detector, Calibration, High Energy Physics::Experiment, Neutrino, Nuclear Experiment, Borexino
Abstract: The Borexino experiment has been running since May 2007 at the Gran Sasso underground laboratory, in Italy. Solar neutrinos are detected with a large unsegmented liquid scintillator detector with unprecedented radioactive purity. The main results obtained include the measurement of the 7Be solar neutrino flux, the measurement of the 8B neutrino flux with electron recoil energy threshold of 3.0 MeV and the first clear detection of geo-neutrinos (see Aldo Ianniʼs talk in these proceedings for further details). Borexino has recently completed a large calibration campaign, and better results on 7Be solar neutrino measurement are expected soon. Short and medium term perspectives are summarized in the conclusions.
Published: 2011

43. Neutrino interactions at few MeV: results from Borexino at Gran Sasso

Author: Laura Perasso, G. Bellini, S. Bonetti, M. Buizza Avanzini, B. Caccianiga, D. DʼAngelo, D. Franco, M. Giammarchi, Y. Koshio, P. Lombardi, L. Ludhova, E. Meroni, L. Miramonti, G. Ranucci, A. Re, J. Benziger, L. Cadonati, A. Pocar, F. Calaprice, A. Chavarria, F. Dalnoki-Veress, C. Galbiati, A. Goretti, Andrea Ianni, M. Leung, B. Loer, K. McCarty, R. Saldanha, A. Wright, C. Carraro, S. Davini, E. Guardincerri, G. Manuzio, M. Pallavicini, S. Perasso, P. Risso, C. Salvo, G. Testera, S. Zavatarelli, H. de Kerret, D. Kryn, M. Obolensky, D. Vignaud, A. Derbin, V. Muratova, A. Etenko, E. Litvinovich, I. Machulin, A. Sabelnikov, M. Skorokhvatov, S. Sukhotin, K. Fomenko, O. Smirnov, A. Sotnikov, O. Zaimidoroga, S. Gazzana, C. Ghiano, Aldo Ianni, G. Korga, M. Laubenstein, L. Papp, A. Razeto, R. Tartaglia, M. Goeger-Neff, T. Lewke, Q. Meindl, L. Oberauer, F. von Feilitzsch, J. Winter, M. Wurm, C. Grieb, S. Hardy, M. Joyce, S. Manecki, R.S. Raghavan, D. Rountree, R.B. Vogelaar, V.V. Kobychev, W. Maneschg, S. Schoenert, H. Simgen, G. Zuzel, F. Masetti, F. Ortica, A. Romani, G. Fiorentini, B. Ricci, M. Misiaszek, D. Montanari, Y. Suvorov, M. Wojcik, Bellini, G., Bonetti, S., Avanzini, M. Buizza, Caccianiga, B., D'Angelo, D., Franco, D., Giammarchi, M., Koshio, Y., Lombardi, P., Ludhova, L., Meroni, E., Miramonti, L., Ranucci, G., Re, A., Benziger, J., Cadonati, L., Pocar, A., Calaprice, F., Chavarria, A., Dalnoki-Veress, F., Galbiati, C., Goretti, A., Ianni, Andrea, Leung, M., Loer, B., Mccarty, K., Saldanha, R., Wright, A., Carraro, C., Davini, S., Guardincerri, E., Manuzio, G., Pallavicini, M., Perasso, S., Risso, P., Salvo, C., Testera, G., Zavatarelli, S., de Kerret, H., Kryn, D., Obolensky, M., Vignaud, D., Derbin, A., Muratova, V., Eteriko, A., Litvinovich, E., Machulin, I., Sabelnikov, A., Skorokhvatov, M., Sukhotin, S., Fomenko, K., Smirnov, O., Sotnikov, A., Zaimidoroga, O., Gazzana, S., Chian, C., Ianni, Aldo, Korga, G., Laubenstein, M., Papp, L., Razeto, A., Tartaglia, R., Goeger-Neff, M., Lewke, T., Meindl, Q., Oberauer, L., von Feilitzsch, F., Winter, J., Wurm, M., Grieb, C., Hardy, S., Joyce, M., Manecki, S., Raghavan, R. S., Rountree, D., Vogelaar, R. B., Kobychev, V. V., Maneschg, W., Schoenert, S., Simgen, H., Zuzel, G., Masetti, F., Ortica, F., Romani, A., Fiorentini, G., Ricci, B., Misiaszek, M., Montanan, D., Suvorov, Y., and Wojcik, M.
Subjects: ICARUS, Physics, Nuclear and High Energy Physics, Particle physics, Physics::Instrumentation and Detectors, Solar neutrino, Astrophysics::Instrumentation and Methods for Astrophysics, Atomic and Molecular Physics, and Optics, NO, Physics::Geophysics, Massless particle, Nuclear physics, Low energy, SOLAR NEUTRINOS, Underground laboratory, High Energy Physics::Experiment, Neutrino, Nuclear Experiment, DETECTOR, Borexino, Lepton
Abstract: Borexino, at the I.N.F.N. Gran Sasso Underground Laboratory in Italy, is an experiment designed to detect, in real-time, low energy solar neutrinos. After a brief presentation of the Borexino physics and detector, we illustrate some recent results and their physics implications. Borexino perspectives are also discussed.
Published: 2011

44. New experimental limits on the Pauli-forbidden transitions inC12nuclei obtained with485days Borexino data

Author: G. Bellini, S. Bonetti, M. Buizza Avanzini, B. Caccianiga, D. D’Angelo, D. Franco, M. Giammarchi, P. Lombardi, L. Ludhova, E. Meroni, L. Miramonti, L. Perasso, G. Ranucci, A. Re, Y. Suvorov, J. Benziger, L. Cadonati, A. Pocar, F. Calaprice, A. Chavarria, F. Dalnoki-Veress, C. Galbiati, A. Goretti, Andrea Ianni, M. Leung, B. Loer, R. Saldanha, J. Xu, C. Carraro, S. Davini, E. Guardincerri, G. Manuzio, M. Pallavicini, S. Perasso, P. Risso, C. Salvo, G. Testera, S. Zavatarelli, H. de Kerret, D. Kryn, M. Obolensky, D. Vignaud, A. Derbin, V. Muratova, A. Etenko, E. Litvinovich, I. Machulin, A. Sabelnikov, M. Skorokhvatov, S. Sukhotin, K. Fomenko, O. Smirnov, A. Sotnikov, O. Zaimidoroga, S. Gazzana, C. Ghiano, Aldo Ianni, G. Korga, D. Montanari, A. Razeto, R. Tartaglia, M. Goeger-Neff, T. Lewke, Q. Meindl, L. Oberauer, F. von Feilitzsch, Y. Winter, M. Wurm, C. Grieb, S. Hardy, M. Joyce, S. Manecki, L. Papp, R. S. Raghavan, D. Rountree, R. B. Vogelaar, W. Maneschg, S. Schönert, H. Simgen, G. Zuzel, M. Misiaszek, M. Wojcik, F. Ortica, and A. Romani
Subjects: Physics, Nuclear and High Energy Physics, Antiparticle, Particle physics, 010308 nuclear & particles physics, Hadron, Carbon-12, Elementary particle, Fermion, 01 natural sciences, 7. Clean energy, Baryon, 0103 physical sciences, 010306 general physics, Nucleon, Lepton
Abstract: The Pauli exclusion principle (PEP) has been tested for nucleons ($n,p$) in $^{12}C$ with the Borexino detector.The approach consists of a search for $\gamma$, $n$, $p$ and $\beta^\pm$ emitted in a non-Paulian transition of 1$P_{3/2}$- shell nucleons to the filled 1$S_{1/2}$ shell in nuclei. Due to the extremely low background and the large mass (278 t) of the Borexino detector, the following most stringent up-to-date experimental bounds on PEP violating transitions of nucleons have been established: $\tau({^{12}\rm{C}}\to{^{12}\widetilde{\rm{C}}}+\gamma) \geq 5.0\cdot10^{31}$ y, $\tau({^{12}\rm{C}}\to{^{11}\widetilde{\rm{B}}}+ p) \geq 8.9\cdot10^{29}$ y, $\tau({^{12}\rm{C}}\to{^{11}\widetilde{\rm{C}}}+ n) \geq 3.4 \cdot 10^{30}$ y, $\tau({^{12}\rm{C}}\to{^{12}\widetilde{\rm{N}}}+ e^- + \widetilde{\nu_e}) \geq 3.1\cdot 10^{30}$ y and $\tau({^{12}\rm{C}}\to{^{12}\widetilde{\rm{B}}}+ e^+ + \nu_e) \geq 2.1 \cdot 10^{30}$ y, all at 90% C.L. The corresponding upper limits on the relative strengths for the searched non-Paulian electromagnetic, strong and weak transitions have been estimated: $\delta^2_{\gamma} \leq 2.2\cdot10^{-57}$, $\delta^2_{N} \leq 4.1\cdot10^{-60}$ and $\delta^2_{\beta} \leq 2.1\cdot10^{-35}$.
Published: 2010
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45. Observation of Geo-Neutrinos

Author: W. Maneschg, F. Dalnoki-Veress, G. Zuzel, P. Risso, R. Tartaglia, Matthias Laubenstein, A. A. Sabelnikov, A. Razeto, M. Skorokhvatov, G. Bellini, R. Saldanha, Michael Wurm, C. Salvo, Jilei Xu, Aldo Romani, L. Papp, A. Goretti, M. Goeger-Neff, Marco Giammarchi, S. Davini, Malcolm J. Joyce, S. Gazzana, S. Perasso, J. Winter, D. Franco, C. Ghiano, R. B. Vogelaar, Q. Meindl, Barbara Ricci, E. Litvinovich, M. Misiaszek, G. Manuzio, Gioacchino Ranucci, A. Sotnikov, O. Zaimidoroga, Alessandra Re, B. Caccianiga, F. Calaprice, E. Guardincerri, T. Lewke, D. Kryn, Cristiano Galbiati, G. Testera, O. Smirnov, Livia Ludhova, A.V. Etenko, D. Vignaud, Giovanni Fiorentini, D. Montanari, D. Rountree, Stefano Bonetti, A. Pocar, B. Loer, Yusuke Koshio, R. S. Raghavan, Aldo Ianni, Marcin Wójcik, Y. Suvorov, L. Oberauer, A. E. Chavarria, L. Perasso, S. Schönert, S. Hardy, Lino Miramonti, Andrea Ianni, Sandra Zavatarelli, S. Manecki, Michael K.H. Leung, V. Muratova, K. Fomenko, Marco Pallavicini, D. D'Angelo, A. Derbin, E. Meroni, J. Benziger, Laura Cadonati, G. Korga, Fausto Ortica, I. Machulin, F. von Feilitzsch, M. Buizza Avanzini, Hardy Simgen, C. Carraro, S. V. Sukhotin, A. Wright, V. V. Kobychev, Paolo Lombardi, M. Obolensky, H. de Kerret, APC - Neutrinos, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC)-AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), AstroParticule et Cosmologie (APC (UMR_7164)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Borexino, Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-AstroParticule et Cosmologie (APC (UMR_7164)), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Bellini, G., Suvorov, Y., and Et, Al.
Subjects: Nuclear and High Energy Physics, [PHYS.ASTR.IM]Physics [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM], Anti-neutrinos from reactors, Geoneutrino, Physics::Instrumentation and Detectors, Solar neutrino, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Anti-neutrinos from reactors, Geo-neutrino, Neutrino detector, 01 natural sciences, 7. Clean energy, NO, Physics::Geophysics, High Energy Physics - Experiment, Neutrino detector, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, 010306 general physics, Nuclear Experiment, Borexino, Physics, Anti-neutrinos from reactor, 010308 nuclear & particles physics, Astronomy, Solar neutrino problem, humanities, [SDU.ASTR.IM]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM], Cosmic neutrino background, Geo-neutrino, 13. Climate action, Measurements of neutrino speed, High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, Neutrino, Neutrino astronomy
Abstract: Geo-neutrinos, electron anti-neutrinos produced in beta decays of naturally occurring radioactive isotopes in the Earth, are a unique direct probe of our planet's interior. We report the first observation at more than 3$\sigma$ C.L. of geo-neutrinos, performed with the Borexino detector at Laboratori Nazionali del Gran Sasso. Anti-neutrinos are detected through the neutron inverse beta decay reaction. With a 252.6 ton-yr fiducial exposure after all selection cuts, we detected 9.9^{+4.1}_{-3.4}(^{+14.6}_{-8.2}) geo-neutrino events, with errors corresponding to a 68.3%(99.73%) C.L. From the $\ln{\cal{L}}$ profile, the statistical significance of the Borexino geo-neutrino observation corresponds to a 99.997% C.L. Our measurement of the geo-neutrinos rate is 3.9^{+1.6}_{-1.3}(^{+5.8}_{-3.2}) events/(100ton-yr). This measurement rejects the hypothesis of an active geo-reactor in the Earth's core with a power above 3 TW at 95% C.L. The observed prompt positron spectrum above 2.6 MeV is compatible with that expected from european nuclear reactors (mean base line of approximately 1000 km). Our measurement of reactor anti-neutrinos excludes the non-oscillation hypothesis at 99.60% C.L., Comment: 8 pages, 4 figures, 3 tables
Published: 2010
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46. The Borexino detector at the Laboratori Nazionali del Gran Sasso

Author: V. Vyrodov, D. Bondi, Malcolm J. Joyce, Laura Cadonati, T. Goldbrunner, T. Hertich, E. de Haas, O. Smirnov, F. von Feiltitsch, M. Misiaszek, W. Czech, Matthias Laubenstein, A. de Bellefon, A. Martemiano, W. Maneschg, Stefano Nisi, M. Marchelli, M. Parodi, Stefano Bonetti, D. Manuzio, Marco Pallavicini, V. M. Gehman, A. Alimonti, Augusto Brigatti, D. Bartolomei, Fausto Ortica, D. D'Angelo, Michael Wurm, Andrew Sonnenschein, I. Machulin, A. Bevilacqua, E. Litvinovich, P. Musico, G. Di Pietro, G. Testera, K. McCarty, R. von Hentig, A. Cubauu, M. Orsini, Sandra Malvezzi, M. E. Monzani, J. Benziger, P. Saggese, J. Kiko, Q. Meindl, S. Parmeggiano, D. Rountree, J. Maneira, A. Di Credico, B. William, Daniel McKinsey, A. Manco, V. Muratova, B. Caccianiga, P.H. La Marche, R. Scardaoni, Aldo Romani, F. Calaprice, L. Papp, B. Freudiger, Ugo Mazzucato, F. Soricelli, D. Vignaud, G. Ceccet, L. Niedermeier, Michael K.H. Leung, A. Pocar, H. Neder, S. Hardy, M. Goeger-Neff, T. A. Shutt, R. Fernholz, G. Manuzio, K. H. Schubeck, Till Kirsten, I. Manno, Cristiano Galbiati, C. Sule, Mikael Hult, A. Nelson, D. Loeser, Danilo Giugni, R. Ceresto, Hardy Simgen, D. Schimizzi, D. Franco, F. Dalnoki-Veress, R. Eisenstein, S. Gazzana, A. Chen, K. Fomenko, V. Lagomarsino, A. de Bari, D. Kryne, C. Carraro, K. Jaenner, S. Vital, R. Tartaglia, E. Harding, D. Montanari, M. Skorokhvatov, G. Bellini, A. A. Sabelnikov, C. Arpesella, R. B. Vogelaar, R. Wordel, S. Schönert, Lino Miramonti, A. Golubchikov, S. Kidner, T. Lewke, C. Lendvai, Martin Deutsch, G. Heusser, A. Derbin, Marcin Wójcik, C. Grieb, Elisa Resconi, E. Meroni, Andrea Ianni, Sandra Zavatarelli, Gioacchino Ranucci, R. S. Raghavan, H.O. Back, Fausto Elisei, G. Korga, R. Saldhana, Y. Suvorov, L. Oberauer, A. Sotnikov, G. Korschnik, M. Gärtner, A. E. Chavarria, L. Perasso, S. V. Sukhotin, V. V. Kobychev, M. Obolensky, H. de Kerret, G. Zuzel, Y. Kozlov, Fausto Masetti, Paolo Lombardi, A.V. Etenko, A. Goretti, Livia Ludhova, W. Hampel, A. S. Chepurnov, M. Balata, F. Siccardi, C. Salvo, B. Loer, C. Hagner, W. Rau, O. Zaimidoroga, P. Risso, F. Gattig, V. G. Tarasenkov, F. Hartmann, Nicomede Pelliccia, A. Razeto, A. Di Ldovico, R. J. Ford, Marco Giammarchi, AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), APC - Neutrinos, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-AstroParticule et Cosmologie (APC (UMR_7164)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, Borexino, Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC)-AstroParticule et Cosmologie (APC (UMR_7164)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Alimonti, G., Suvorov, Y., Et, Al., Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), and PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris
Subjects: Low background detector, Nuclear and High Energy Physics, Photomultiplier, Particle physics, Liquid scintillator, Physics - Instrumentation and Detectors, [PHYS.ASTR.IM]Physics [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM], Physics::Instrumentation and Detectors, [SDU.ASTR.CO]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Solar neutrino, FOS: Physical sciences, Scintillator, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Astrophysics, 7. Clean energy, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], High Energy Physics - Experiment (hep-ex), Low background detectors, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, Instrumentation, Borexino, Nuclear and High Energy Physic, Physics, ICARUS, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], 010308 nuclear & particles physics, Astrophysics (astro-ph), Detector, Astrophysics::Instrumentation and Methods for Astrophysics, Instrumentation and Detectors (physics.ins-det), Liquid scintillators, [SDU.ASTR.IM]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM], High Energy Physics::Experiment, Neutrino, Large Volume Detector
Abstract: Borexino, a large volume detector for low energy neutrino spectroscopy, is currently running underground at the Laboratori Nazionali del Gran Sasso, Italy. The main goal of the experiment is the real-time measurement of sub MeV solar neutrinos, and particularly of the mono energetic (862 keV) Be7 electron capture neutrinos, via neutrino-electron scattering in an ultra-pure liquid scintillator. This paper is mostly devoted to the description of the detector structure, the photomultipliers, the electronics, and the trigger and calibration systems. The real performance of the detector, which always meets, and sometimes exceeds, design expectations, is also shown. Some important aspects of the Borexino project, i.e. the fluid handling plants, the purification techniques and the filling procedures, are not covered in this paper and are, or will be, published elsewhere (see Introduction and Bibliography)., Comment: 37 pages, 43 figures, to be submitted to NIM
Published: 2009
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47. First results on 7Be solar neutrinos from the Borexino real time detector

Author: G Bellini, J Benziger, S Bonetti, B Caccianiga, F Calaprice, F Dalnoki-Veress, D D'Angelo, H de Kerret, A Derbin, A Etenko, K Fomenko, R Ford, D Franco, C Galbiati, S Gazzana, M Giammarchi, M Goeger-Neff, A Goretti, C Grieb, S Hardy, G Heusser, A Ianni, M Joyce, G Korga, D Kryn, M Laubenstein, M Leung, E Litvinovich, P Lombardi, L Ludhova, I Machulin, G Manuzio, F Masetti, K McCarty, E Meroni, L Miramonti, M Misiaszek, D Montanari, M E Monzani, V Muratova, L Niedermeier, L Oberauer, M Obolensky, F Ortica, M Pallavicini, L Papp, L Perasso, A Pocar, R S Raghavan, G Ranucci, A Razeto, A Sabelnikov, C Salvo, S Schönert, H Simgen, O Smirnov, M Skorokhvatov, A Sonnenschein, A Sotnikov, S Sukhotin, Y Suvorov, V Tarasenkov, R Tartaglia, G Testera, D Vignaud, R B Vogelaar, F von Feilitzsch, M Wojcik, O Zaimidoroga, S Zavatarelli, G Zuzel, the Borexino Collaboration, APC - Neutrinos, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), AstroParticule et Cosmologie (APC (UMR_7164)), Borexino, Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC)-AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), and PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)
Subjects: Physics, History, Particle physics, 010308 nuclear & particles physics, Physics::Instrumentation and Detectors, Solar neutrino, Detector, Solar neutrino problem, 01 natural sciences, 7. Clean energy, Computer Science Applications, Education, Nuclear physics, Neutrino detector, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Measurements of neutrino speed, High Energy Physics::Experiment, Neutrino, 010306 general physics, Order of magnitude, Borexino
Abstract: International audience; The Borexino experiment started the data taking may 15th 2007. It is until now the only experiment able to detect in real time neutrino interactions below 2 MeV. This is due to the very high radio-purity reached by the detector, more than one order of magnitude better than the goal of the design. The detector allows the single fluxes of low energy solar neutrinos to be determined from all sources not previously studied: 7Be, pep, CNO and hopefully pp. Here the first measurement of the 7Be, obtained from the first 47.6 live days of data taking, is presented.
Published: 2008
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48. Direct Measurement of the 7Be Solar Neutrino Flux with 192 Days of Borexino Data

Author: C, Arpesella, H O, Back, M, Balata, G, Bellini, J, Benziger, S, Bonetti, A, Brigatti, B, Caccianiga, L, Cadonati, F, Calaprice, C, Carraro, G, Cecchet, A, Chavarria, M, Chen, F, Dalnoki-Veress, D, D'Angelo, A, de Bari, A, de Bellefon, H, de Kerret, A, Derbin, M, Deutsch, A, di Credico, G, di Pietro, R, Eisenstein, F, Elisei, A, Etenko, R, Fernholz, K, Fomenko, R, Ford, D, Franco, B, Freudiger, C, Galbiati, F, Gatti, S, Gazzana, M, Giammarchi, D, Giugni, M, Goeger-Neff, T, Goldbrunner, A, Goretti, C, Grieb, C, Hagner, W, Hampel, E, Harding, S, Hardy, F X, Hartman, T, Hertrich, G, Heusser, Aldo, Ianni, Andrea, Ianni, M, Joyce, J, Kiko, T, Kirsten, V, Kobychev, G, Korga, G, Korschinek, D, Kryn, V, Lagomarsino, P, Lamarche, M, Laubenstein, C, Lendvai, M, Leung, T, Lewke, E, Litvinovich, B, Loer, P, Lombardi, L, Ludhova, I, Machulin, S, Malvezzi, S, Manecki, J, Maneira, W, Maneschg, I, Manno, D, Manuzio, G, Manuzio, A, Martemianov, F, Masetti, U, Mazzucato, K, McCarty, D, McKinsey, Q, Meindl, E, Meroni, L, Miramonti, M, Misiaszek, D, Montanari, M E, Monzani, V, Muratova, P, Musico, H, Neder, A, Nelson, L, Niedermeier, L, Oberauer, M, Obolensky, M, Orsini, F, Ortica, M, Pallavicini, L, Papp, S, Parmeggiano, L, Perasso, A, Pocar, R S, Raghavan, G, Ranucci, W, Rau, A, Razeto, E, Resconi, P, Risso, A, Romani, D, Rountree, A, Sabelnikov, R, Saldanha, C, Salvo, D, Schimizzi, S, Schönert, T, Shutt, H, Simgen, M, Skorokhvatov, O, Smirnov, A, Sonnenschein, A, Sotnikov, S, Sukhotin, Y, Suvorov, R, Tartaglia, G, Testera, D, Vignaud, S, Vitale, R B, Vogelaar, F, von Feilitzsch, R, von Hentig, T, von Hentig, M, Wojcik, M, Wurm, O, Zaimidoroga, S, Zavatarelli, G, Zuzel, AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), APC - Neutrinos, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-AstroParticule et Cosmologie (APC (UMR_7164)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, Borexino, Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC)-AstroParticule et Cosmologie (APC (UMR_7164)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), and PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris
Subjects: [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], Physics::Instrumentation and Detectors, [SDU.ASTR.CO]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], High Energy Physics::Phenomenology, Astrophysics::Solar and Stellar Astrophysics, High Energy Physics::Experiment, Nuclear Experiment
Abstract: We report the direct measurement of the 7Be solar neutrino signal rate performed with the Borexino detector at the Laboratori Nazionali del Gran Sasso. The interaction rate of the 0.862 MeV 7Be neutrinos is 49+/-3stat+/-4syst counts/(day.100 ton). The hypothesis of no oscillation for 7Be solar neutrinos is inconsistent with our measurement at the 4sigma C.L. Our result is the first direct measurement of the survival probability for solar nu(e) in the transition region between matter-enhanced and vacuum-driven oscillations. The measurement improves the experimental determination of the flux of 7Be, pp, and CNO solar nu(e), and the limit on the effective neutrino magnetic moment using solar neutrinos.
Published: 2008
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49. Report of the Solar and Atmospheric Neutrino Working Group

Author: R. B. Vogelaar, C. Galbiati, R.L. Hahn, C. Gonzalez-Garcia, J. Bernabeu, Michele Maltoni, M.G. Boulay, Henry W. Sobel, Joshua R. Klein, John G. Learned, Daniel McKinsey, C.K. Jung, Michael Pitt, R. G. H. Robertson, F. Calaprice, S. Palomares-Ruiz, H. O. Back, J. Losecco, Andrew Hime, R. Lanou, M. Koike, K. M. Heeger, Tatsu Takeuchi, R. Raghavan, T. J. Bowles, H. R. Gallagher, Arthur E Champagne, S. T. Petcov, C. Pena-Garay, Stuart Freedman, M. Gai, L. Wolfenstein, Kate Scholberg, Alexander Mann, A. Piepke, K. T. Lesko, and John N. Bahcall
Subjects: Physics, Sterile neutrino, Standard solar model, Particle physics, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Solar neutrino, High Energy Physics::Phenomenology, Solar neutrino problem, Neutrino detector, Astrophysics::Solar and Stellar Astrophysics, Measurements of neutrino speed, High Energy Physics::Experiment, Neutrino, Neutrino oscillation
Abstract: The highest priority of the Solar and Atmospheric Neutrino Experiment Working Group is the development of a real-time, precision experiment that measures the pp solar neutrino flux. A measurement of the pp solar neutrino flux, in comparison with the existing precision measurements of the high energy {sup 8}B neutrino flux, will demonstrate the transition between vacuum and matter-dominated oscillations, thereby quantitatively testing a fundamental prediction of the standard scenario of neutrino flavor transformation. The initial solar neutrino beam is pure {nu}{sub e}, which also permits sensitive tests for sterile neutrinos. The pp experiment will also permit a significantly improved determination of {theta}{sub 12} and, together with other solar neutrino measurements, either a measurement of {theta}{sub 13} or a constraint a factor of two lower than existing bounds. In combination with the essential pre-requisite experiments that will measure the {sup 7}Be solar neutrino flux with a precision of 5%, a measurement of the pp solar neutrino flux will constitute a sensitive test for non-standard energy generation mechanisms within the Sun. The Standard Solar Model predicts that the pp and {sup 7}Be neutrinos together constitute more than 98% of the solar neutrino flux. The comparison of the solar luminosity measured via neutrinos to that measured via photons will test for any unknown energy generation mechanisms within the nearest star. A precise measurement of the pp neutrino flux (predicted to be 92% of the total flux) will also test stringently the theory of stellar evolution since the Standard Solar Model predicts the pp flux with a theoretical uncertainty of 1%. We also find that an atmospheric neutrino experiment capable of resolving the mass hierarchy is a high priority. Atmospheric neutrino experiments may be the only alternative to very long baseline accelerator experiments as a way of resolving this fundamental question. Such an experiment could be a very large scale water Cerenkov detector, or a magnetized detector with flavor and antiflavor sensitivity. Additional priorities are nuclear physics measurements which will reduce the uncertainties in the predictions of the Standard Solar Model, and similar supporting measurements for atmospheric neutrinos (cosmic ray fluxes, magnetic fields, etc.). We note as well that the detectors for both solar and atmospheric neutrino measurements can serve as multipurpose detectors, with capabilities of discovering dark matter, relic supernova neutrinos, proton decay, or as targets for long baseline accelerator neutrino experiments.
Published: 2004
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50. Measurements of extremely low radioactivity levels in BOREXINO

Author: C. Arpesella, H.O. Back, M. Balata, T. Beau, G. Bellini, J. Benziger, S. Bonetti, A. Brigatti, C. Buck, B. Caccianiga, L. Cadonati, F. Calaprice, G. Cecchet, M. Chen, O. Dadoun, D. D'Angelo, A. De Bari, A. de Bellefon, E. De Haas, H. de Kerret, A. Derbin, M. Deutsch, A. Di Credico, F. Elisei, A. Etenko, F. von Feilitzsch, R. Fernholz, R. Ford, D. Franco, B. Freudiger, C. Galbiati, F. Gatti, S. Gazzana, M.G. Giammarchi, D. Giugni, M. Göger-Neff, T. Goldbrunner, A. Golubchikov, A. Goretti, C. Grieb, C. Hagner, T. Hagner, W. Hampel, E. Harding, F.X. Hartmann, R. von Hentig, G. Heusser, M. Hult, A. Ianni, A.M. Ianni, J. Kiko, T. Kirsten, M. Köhler, G. Korga, G. Korschinek, Y. Kozlov, D. Kryn, P. LaMarche, M. Laubenstein, C. Lendvai, F. Loeser, P. Lombardi, K. McCarty, I. Machulin, S. Malvezzi, J. Maneira, I. Manno, G. Manuzio, A. Martemianov, F. Masetti, U. Mazzucato, E. Meroni, L. Miramonti, M.E. Monzani, P. Musico, H. Neder, L. Niedermeier, S. Nisi, L. Oberauer, M. Obolensky, F. Ortica, M. Pallavicini, L. Papp, L. Perasso, A. Pocar, R.S. Raghavan, G. Ranucci, W. Rau, A. Razeto, E. Resconi, T. Riedel, A. Sabelnikov, C. Salvo, R. Scardaoni, S. Schönert, K.H. Schuhbeck, T. Shutt, H. Simgen, A. Sonnenschein, O. Smirnov, A. Sotnikov, M. Skorokhvatov, S. Sukhotin, V. Tarasenkov, R. Tartaglia, G. Testera, P.R. Trincherini, V. Vyrodov, R.B. Vogelaar, D. Vignaud, S. Vitale, M. Wójcik, O. Zaimidoroga, and G. Zuzel
Subjects: Physics, Scintillation, Particle physics, Solar neutrino, radioactivity low level measurements, BOREXINO, Isotope, Physics::Instrumentation and Detectors, Settore FIS/01 - Fisica Sperimentale, FOS: Physical sciences, chemistry.chemical_element, Astronomy and Astrophysics, Germanium, Mass spectrometry, High Energy Physics - Experiment, Settore FIS/04 - Fisica Nucleare e Subnucleare, Nuclear physics, High Energy Physics - Experiment (hep-ex), chemistry, Atom, Borexino, Neutron activation
Abstract: The techniques researched, developed and applied towards the measurement of radioisotope concentrations at ultra-low levels in the real-time solar neutrino experiment BOREXINO at Gran Sasso are presented and illustrated with specific results of widespread interest. We report the use of low-level germanium gamma spectrometry, low-level miniaturized gas proportional counters and low background scintillation detectors developed in solar neutrino research. Each now sets records in its field. We additionally describe our techniques of radiochemical ultra-pure, few atom manipulations and extractions. Forefront measurements also result from the powerful combination of neutron activation and low-level counting. Finally, with our techniques and commercially available mass spectrometry and atomic absorption spectroscopy, new low-level detection limits for isotopes of interest are obtained., 27 pages, 5 figures. Submitted to Astroparticle Physics (17 Sep 2001). Spokesperson of the Borexino Collaboration: G. Bellini. Corresponding author: W. Hampel
Published: 2002

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