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149 results on '"K. Pelczar"'

1. Searches for new physics below twice the electron mass with GERDA

Author

GERDA Collaboration, M. Agostini, A. Alexander, G. Araujo, A. M. Bakalyarov, M. Balata, I. Barabanov, L. Baudis, C. Bauer, S. Belogurov, A. Bettini, L. Bezrukov, V. Biancacci, E. Bossio, V. Bothe, R. Brugnera, A. Caldwell, S. Calgaro, C. Cattadori, A. Chernogorov, P.-J. Chiu, T. Comellato, V. D’Andrea, E. V. Demidova, N. Di Marco, E. Doroshkevich, M. Fomina, A. Gangapshev, A. Garfagnini, C. Gooch, P. Grabmayr, V. Gurentsov, K. Gusev, J. Hakenmüller, S. Hemmer, W. Hofmann, J. Huang, M. Hult, L. V. Inzhechik, J. Janicskó Csáthy, J. Jochum, M. Junker, V. Kazalov, Y. Kermaïdic, H. Khushbakht, T. Kihm, K. Kilgus, I. V. Kirpichnikov, A. Klimenko, K. T. Knöpfle, O. Kochetov, V. N. Kornoukhov, P. Krause, V. V. Kuzminov, M. Laubenstein, M. Lindner, I. Lippi, A. Lubashevskiy, B. Lubsandorzhiev, G. Lutter, C. Macolino, B. Majorovits, W. Maneschg, G. Marshall, M. Misiaszek, M. Morella, Y. Müller, I. Nemchenok, M. Neuberger, L. Pandola, K. Pelczar, L. Pertoldi, P. Piseri, A. Pullia, C. Ransom, L. Rauscher, M. Redchuk, S. Riboldi, N. Rumyantseva, C. Sada, S. Sailer, F. Salamida, S. Schönert, J. Schreiner, A-K. Schütz, O. Schulz, M. Schwarz, B. Schwingenheuer, O. Selivanenko, E. Shevchik, M. Shirchenko, L. Shtembari, H. Simgen, A. Smolnikov, D. Stukov, S. Sullivan, A. A. Vasenko, A. Veresnikova, C. Vignoli, K. von Sturm, T. Wester, C. Wiesinger, M. Wojcik, E. Yanovich, B. Zatschler, I. Zhitnikov, S. V. Zhukov, D. Zinatulina, A. Zschocke, K. Zuber, and G. Zuzel

Subjects
Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract A search for full energy depositions from bosonic keV-scale dark matter candidates of masses between 65 and 1021 keV has been performed with data collected during Phase II of the GERmanium Detector Array (Gerda) experiment. Our analysis includes direct dark matter absorption as well as dark Compton scattering. With a total exposure of 105.5 kg years, no evidence for a signal above the background has been observed. The resulting exclusion limits deduced with either Bayesian or Frequentist statistics are the most stringent direct constraints in the major part of the 140–1021 keV mass range. As an example, at a mass of 150 keV the dimensionless coupling of dark photons and axion-like particles to electrons has been constrained to $$\alpha '/\alpha 1.5 \times 10^{24}$$ τ n > 1.5 × 10 24 years and for a proton $$\tau _\textrm{p} > 1.3 \times 10^{24}$$ τ p > 1.3 × 10 24 years at 90% CI. For the electron decay $$e^\text {-} \rightarrow \nu _\textrm{e} \gamma $$ e - → ν e γ a lower limit of $$\tau _\textrm{e} > 5.4\times 10^{25}$$ τ e > 5.4 × 10 25 years at 90% CI has been determined.

Published
2024
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2. Constraining nucleon effective masses with flow and stopping observables from the SπRIT experiment

Author

C.Y. Tsang, M. Kurata-Nishimura, M.B. Tsang, W.G. Lynch, Y.X. Zhang, J. Barney, J. Estee, G. Jhang, R. Wang, M. Kaneko, J.W. Lee, T. Isobe, T. Murakami, D.S. Ahn, L. Atar, T. Aumann, H. Baba, K. Boretzky, J. Brzychczyk, G. Cerizza, N. Chiga, N. Fukuda, I. Gasparic, B. Hong, A. Horvat, K. Ieki, N. Inabe, Y.J. Kim, T. Kobayashi, Y. Kondo, P. Lasko, H.S. Lee, Y. Leifels, J. Łukasik, J. Manfredi, A.B. McIntosh, P. Morfouace, T. Nakamura, N. Nakatsuka, S. Nishimura, H. Otsu, P. Pawłowski, K. Pelczar, D. Rossi, H. Sakurai, C. Santamaria, H. Sato, H. Scheit, R. Shane, Y. Shimizu, H. Simon, A. Snoch, A. Sochocka, T. Sumikama, H. Suzuki, D. Suzuki, H. Takeda, S. Tangwancharoen, H. Törnqvist, Y. Togano, Z.G. Xiao, S.J. Yennello, and Y. Zhang

Subjects
Physics, QC1-999
Abstract

Properties of the nuclear equation of state (EoS) can be probed by measuring the dynamical properties of nucleus-nucleus collisions. In this study, we present the directed flow (v1), elliptic flow (v2) and stopping (VarXZ) measured in fixed target Sn + Sn collisions at Image 1 with the SπRIT Time Projection Chamber. We perform Bayesian analyses in which EoS parameters are varied simultaneously within the Improved Quantum Molecular Dynamics-Skyrme (ImQMD-Sky) transport code to obtain a multivariate correlated constraint. The varied parameters include symmetry energy, S0, and slope of the symmetry energy, L, at saturation density, isoscalar effective mass, ms⁎/mN, isovector effective mass, mv⁎/mN and the in-medium cross-section enhancement factor η. We find that the flow and VarXZ observables are sensitive to the splitting of proton and neutron effective masses and the in-medium cross-section. Comparisons of ImQMD-Sky predictions to the SπRIT data suggest a narrow range of preferred values for ms⁎/mN, mv⁎/mN and η.

Published
2024
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3. Search for tri-nucleon decays of $$^{76}$$ 76 Ge in GERDA

Author

M. Agostini, A. Alexander, G. Araujo, A. M. Bakalyarov, M. Balata, I. Barabanov, L. Baudis, C. Bauer, S. Belogurov, A. Bettini, L. Bezrukov, V. Biancacci, E. Bossio, V. Bothe, R. Brugnera, A. Caldwell, S. Calgaro, C. Cattadori, A. Chernogorov, P.-J. Chiu, T. Comellato, V. D’Andrea, E. V. Demidova, A. Di Giacinto, N. Di Marco, E. Doroshkevich, F. Fischer, M. Fomina, A. Gangapshev, A. Garfagnini, C. Gooch, P. Grabmayr, V. Gurentsov, K. Gusev, J. Hakenmüller, S. Hemmer, W. Hofmann, M. Hult, L. V. Inzhechik, J. Janicskó Csáthy, J. Jochum, M. Junker, V. Kazalov, Y. Kermaïdic, H. Khushbakht, T. Kihm, K. Kilgus, I. V. Kirpichnikov, A. Klimenko, K. T. Knöpfle, O. Kochetov, V. N. Kornoukhov, P. Krause, V. V. Kuzminov, M. Laubenstein, M. Lindner, I. Lippi, A. Lubashevskiy, B. Lubsandorzhiev, G. Lutter, C. Macolino, B. Majorovits, W. Maneschg, L. Manzanillas, G. Marshall, M. Misiaszek, M. Morella, Y. Müller, I. Nemchenok, M. Neuberger, L. Pandola, K. Pelczar, L. Pertoldi, P. Piseri, A. Pullia, L. Rauscher, M. Redchuk, S. Riboldi, N. Rumyantseva, C. Sada, S. Sailer, F. Salamida, S. Schönert, J. Schreiner, M. Schütt, A.-K. Schütz, O. Schulz, M. Schwarz, B. Schwingenheuer, O. Selivanenko, E. Shevchik, M. Shirchenko, L. Shtembari, H. Simgen, A. Smolnikov, D. Stukov, S. Sullivan, A. A. Vasenko, A. Veresnikova, C. Vignoli, K. von Sturm, T. Wester, C. Wiesinger, M. Wojcik, E. Yanovich, B. Zatschler, I. Zhitnikov, S. V. Zhukov, D. Zinatulina, A. Zschocke, A. J. Zsigmond, K. Zuber, G. Zuzel, and GERDA collaboration

Subjects
Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract We search for tri-nucleon decays of $$^{76}$$ 76 Ge in the dataset from the GERmanium Detector Array (GERDA) experiment. Decays that populate excited levels of the daughter nucleus above the threshold for particle emission lead to disintegration and are not considered. The ppp-, ppn-, and pnn-decays lead to $$^{73}$$ 73 Cu, $$^{73}$$ 73 Zn, and $$^{73}$$ 73 Ga nuclei, respectively. These nuclei are unstable and eventually proceed by the beta decay of $$^{73}$$ 73 Ga to $$^{73}$$ 73 Ge (stable). We search for the $$^{73}$$ 73 Ga decay exploiting the fact that it dominantly populates the 66.7 keV $$^{73m}$$ 73 m Ga state with half-life of 0.5 s. The nnn-decays of $$^{76}$$ 76 Ge that proceed via $$^{73m}$$ 73 m Ge are also included in our analysis. We find no signal candidate and place a limit on the sum of the decay widths of the inclusive tri-nucleon decays that corresponds to a lower lifetime limit of 1.2 $$\times $$ × 10 $$^{26}$$ 26 yr (90% credible interval). This result improves previous limits for tri-nucleon decays by one to three orders of magnitude.

Published
2023
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4. Measurement of isotopic separation of argon with the prototype of the cryogenic distillation plant Aria for dark matter searches

Author

E. Aaron, P. Agnes, I. Ahmad, S. Albergo, I. F. M. Albuquerque, T. Alexander, A. K. Alton, P. Amaudruz, M. Atzori Corona, M. Ave, I. Ch. Avetisov, O. Azzolini, H. O. Back, Z. Balmforth, A. Barrado, P. Barrillon, A. Basco, G. Batignani, V. Bocci, W. M. Bonivento, B. Bottino, M. G. Boulay, J. Busto, M. Cadeddu, A. Caminata, N. Canci, A. Capra, S. Caprioli, M. Caravati, N. Cargioli, M. Carlini, P. Castello, P. Cavalcante, S. Cavuoti, S. Cebrian, J. M. Cela Ruiz, S. Chashin, A. Chepurnov, E. Chyhyrynets, L. Cifarelli, D. Cintas, M. Citterio, B. Cleveland, V. Cocco, E. Conde Vilda, L. Consiglio, S. Copello, G. Covone, M. Czubak, M. D’Aniello, S. D’Auria, M. D. Da Rocha Rolo, S. Davini, S. De Cecco, G. De Guido, D. De Gruttola, S. De Pasquale, G. De Rosa, G. Dellacasa, A. V. Derbin, A. Devoto, F. Di Capua, L. Di Noto, P. Di Stefano, G. Dolganov, F. Dordei, E. Ellingwood, T. Erjavec, S. Farenzena, M. Fernandez Diaz, G. Fiorillo, P. Franchini, D. Franco, N. Funicello, F. Gabriele, D. Gahan, C. Galbiati, G. Gallina, G. Gallus, M. Garbini, P. Garcia Abia, A. Gendotti, C. Ghiano, C. Giganti, G. K. Giovanetti, V. Goicoechea Casanueva, A. Gola, G. Grauso, G. Grilli di Cortona, A. Grobov, M. Gromov, M. Guan, M. Guerzoni, M. Gulino, C. Guo, B. R. Hackett, A. L. Hallin, A. Hamer, M. Haranczyk, T. Hessel, S. Hill, S. Horikawa, F. Hubaut, J. Hucker, T. Hugues, An. Ianni, V. Ippolito, C. Jillings, S. Jois, P. Kachru, A. A. Kemp, C. L. Kendziora, M. Kimura, I. Kochanek, K. Kondo, G. Korga, S. Koulosousas, A. Kubankin, M. Kuss, M. Kuźniak, M. La Commara, M. Lai, N. Lami, E. Le Guirriec, E. Leason, A. Leoni, L. Lidey, F. Lippi, M. Lissia, L. Luzzi, O. Lychagina, N. Maccioni, O. Macfadyen, I. N. Machulin, S. Manecki, I. Manthos, L. Mapelli, A. Margotti, S. M. Mari, C. Mariani, J. Maricic, A. Marini, M. Martínez, C. J. Martoff, M. Mascia, A. Masoni, G. Matteucci, K. Mavrokoridis, C. Maxia, A. B. McDonald, A. Messina, R. Milincic, A. Mitra, A. Moharana, S. Moioli, J. Monroe, E. Moretti, M. Morrocchi, T. Mróz, V. N. Muratova, C. Muscas, P. Musico, R. Nania, M. Nessi, K. Nikolopoulos, J. Nowak, K. Olchansky, A. Oleinik, V. Oleynikov, P. Organtini, A. Ortiz de Solórzano, L. Pagani, M. Pallavicini, L. Pandola, E. Pantic, E. Paoloni, G. Paternoster, P. A. Pegoraro, K. Pelczar, L. A. Pellegrini, C. Pellegrino, V. Pesudo, S. Piacentini, L. Pietrofaccia, N. Pino, A. Pocar, D. M. Poehlmann, S. Pordes, P. Pralavorio, D. Price, F. Ragusa, Y. Ramachers, M. Razeti, A. L. Renshaw, M. Rescigno, F. Retiere, L. P. Rignanese, C. Ripoli, A. Rivetti, A. Roberts, C. Roberts, J. Rode, G. Rogers, L. Romero, M. Rossi, A. Rubbia, M. A. Sabia, G. M. Sabiu, P. Salomone, E. Sandford, S. Sanfilippo, D. Santone, R. Santorelli, C. Savarese, E. Scapparone, G. Schillaci, F. Schukman, G. Scioli, M. Simeone, P. Skensved, M. D. Skorokhvatov, O. Smirnov, T. Smirnova, B. Smith, F. Spadoni, M. Spangenberg, R. Stefanizzi, A. Steri, V. Stornelli, S. Stracka, M. Stringer, S. Sulis, A. Sung, Y. Suvorov, A. M. Szelc, R. Tartaglia, A. Taylor, J. Taylor, S. Tedesco, G. Testera, K. Thieme, T. N. Thorpe, A. Tonazzo, A. Tricomi, E. V. Unzhakov, T. Vallivilayil John, M. Van Uffelen, T. Viant, S. Viel, R. B. Vogelaar, J. Vossebeld, M. Wada, M. B. Walczak, H. Wang, Y. Wang, S. Westerdale, L. Williams, I. Wingerter-Seez, R. Wojaczyński, Ma. M. Wojcik, T. Wright, Y. Xie, C. Yang, A. Zabihi, P. Zakhary, A. Zani, A. Zichichi, G. Zuzel, M. P. Zykova, and DarkSide-20k Collaboration

Subjects
Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract The Aria cryogenic distillation plant, located in Sardinia, Italy, is a key component of the DarkSide-20k experimental program for WIMP dark matter searches at the INFN Laboratori Nazionali del Gran Sasso, Italy. Aria is designed to purify the argon, extracted from underground wells in Colorado, USA, and used as the DarkSide-20k target material, to detector-grade quality. In this paper, we report the first measurement of argon isotopic separation by distillation with the 26 m tall Aria prototype. We discuss the measurement of the operating parameters of the column and the observation of the simultaneous separation of the three stable argon isotopes: $${}^{36}\hbox {Ar}$$ 36 Ar , $${}^{38}\textrm{Ar}$$ 38 Ar , and $${}^{40}\textrm{Ar}$$ 40 Ar . We also provide a detailed comparison of the experimental results with commercial process simulation software. This measurement of isotopic separation of argon is a significant achievement for the project, building on the success of the initial demonstration of isotopic separation of nitrogen using the same equipment in 2019.

Published
2023
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5. 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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6. Liquid argon light collection and veto modeling in GERDA Phase II

Author

M. Agostini, A. Alexander, G. R. Araujo, A. M. Bakalyarov, M. Balata, I. Barabanov, L. Baudis, C. Bauer, S. Belogurov, A. Bettini, L. Bezrukov, V. Biancacci, E. Bossio, V. Bothe, R. Brugnera, A. Caldwell, S. Calgaro, C. Cattadori, A. Chernogorov, P. -J. Chiu, T. Comellato, V. D’Andrea, E. V. Demidova, A. Di Giacinto, N. Di Marco, E. Doroshkevich, F. Fischer, M. Fomina, A. Gangapshev, A. Garfagnini, C. Gooch, P. Grabmayr, V. Gurentsov, K. Gusev, J. Hakenmüller, S. Hemmer, W. Hofmann, M. Hult, L. V. Inzhechik, J. Janicskó Csáthy, J. Jochum, M. Junker, V. Kazalov, Y. Kermaïdic, H. Khushbakht, T. Kihm, K. Kilgus, I. V. Kirpichnikov, A. Klimenko, K. T. Knöpfle, O. Kochetov, V. N. Kornoukhov, P. Krause, V. V. Kuzminov, M. Laubenstein, B. Lehnert, M. Lindner, I. Lippi, A. Lubashevskiy, B. Lubsandorzhiev, G. Lutter, C. Macolino, B. Majorovits, W. Maneschg, L. Manzanillas, G. Marshall, M. Miloradovic, R. Mingazheva, M. Misiaszek, M. Morella, Y. Müller, I. Nemchenok, M. Neuberger, L. Pandola, K. Pelczar, L. Pertoldi, P. Piseri, A. Pullia, L. Rauscher, M. Redchuk, S. Riboldi, N. Rumyantseva, C. Sada, S. Sailer, F. Salamida, S. Schönert, J. Schreiner, M. Schütt, A. -K. Schütz, O. Schulz, M. Schwarz, B. Schwingenheuer, O. Selivanenko, E. Shevchik, M. Shirchenko, L. Shtembari, H. Simgen, A. Smolnikov, D. Stukov, S. Sullivan, A. A. Vasenko, A. Veresnikova, C. Vignoli, K. von Sturm, A. Wegmann, T. Wester, C. Wiesinger, M. Wojcik, E. Yanovich, B. Zatschler, I. Zhitnikov, S. V. Zhukov, D. Zinatulina, A. Zschocke, A. J. Zsigmond, K. Zuber, G. Zuzel, and Gerda collaboration

Subjects
Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract The ability to detect liquid argon scintillation light from within a densely packed high-purity germanium detector array allowed the Gerda experiment to reach an exceptionally low background rate in the search for neutrinoless double beta decay of $${}^{76}$$ 76 Ge. Proper modeling of the light propagation throughout the experimental setup, from any origin in the liquid argon volume to its eventual detection by the novel light read-out system, provides insight into the rejection capability and is a necessary ingredient to obtain robust background predictions. In this paper, we present a model of the Gerda liquid argon veto, as obtained by Monte Carlo simulations and constrained by calibration data, and highlight its application for background decomposition.

Published
2023
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7. Air humidity and annual oscillations in 90Sr/90Y and 60Co decay rate measurements

Author

S. Pommé, K. Pelczar, and I. Kajan

Subjects
Medicine, Science
Abstract

Abstract Parkhomov published decay rate measurements of 90Sr/90Y and 60Co beta decay sources with Geiger–Müller counters which showed annual cyclic deviations with less than 0.2% amplitude from a purely exponential slope. He investigated instrument instability induced by environmental parameters, yet did not find a clear coincidence with local temperature, atmospheric pressure, and relative humidity. Parkhomov hypothesised that gravitationally-focussed ‘slow’ cosmic neutrinos influenced beta decay. In the current work, environmental conditions in the Moscow area at the time of the experiment are presented. There appears to be a resemblance of the shape of the annual 90Sr/90Y decay rate anomalies with the inverse of the absolute air humidity, albeit with an apparent time shift of 0.05–0.15 year. Humidity may have influenced the range of beta particles in air, as well as geometric and electronic properties of the detection set-up, however causality could not be unambiguously demonstrated. The instabilities in the 60Co data were more difficult to correlate with environmental data, except for some similarities with temperature and external dew point.

Published
2022
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8. Pulse shape analysis in Gerda Phase II

Author

M. Agostini, G. Araujo, A. M. Bakalyarov, M. Balata, I. Barabanov, L. Baudis, C. Bauer, E. Bellotti, S. Belogurov, A. Bettini, L. Bezrukov, V. Biancacci, E. Bossio, V. Bothe, V. Brudanin, R. Brugnera, A. Caldwell, C. Cattadori, A. Chernogorov, T. Comellato, V. D’Andrea, E. V. Demidova, N. Di Marco, E. Doroshkevich, F. Fischer, M. Fomina, A. Gangapshev, A. Garfagnini, C. Gooch, P. Grabmayr, V. Gurentsov, K. Gusev, J. Hakenmüller, S. Hemmer, R. Hiller, W. Hofmann, J. Huang, M. Hult, L. V. Inzhechik, J. Janicskó Csáthy, J. Jochum, M. Junker, V. Kazalov, Y. Kermaïdic, H. Khushbakht, T. Kihm, K. Kilgus, A. Kirsch, I. V. Kirpichnikov, A. Klimenko, K. T. Knöpfle, O. Kochetov, V. N. Kornoukhov, P. Krause, V. V. Kuzminov, M. Laubenstein, A. Lazzaro, M. Lindner, I. Lippi, A. Lubashevskiy, B. Lubsandorzhiev, G. Lutter, C. Macolino, B. Majorovits, W. Maneschg, L. Manzanillas, M. Miloradovic, R. Mingazheva, M. Misiaszek, Y. Müller, I. Nemchenok, K. Panas, L. Pandola, K. Pelczar, L. Pertoldi, P. Piseri, A. Pullia, C. Ransom, L. Rauscher, M. Redchuk, S. Riboldi, N. Rumyantseva, C. Sada, F. Salamida, S. Schönert, J. Schreiner, M. Schütt, A. -K. Schütz, O. Schulz, M. Schwarz, B. Schwingenheuer, O. Selivanenko, E. Shevchik, M. Shirchenko, L. Shtembari, H. Simgen, A. Smolnikov, D. Stukov, A. A. Vasenko, A. Veresnikova, C. Vignoli, K. von Sturm, V. Wagner, T. Wester, C. Wiesinger, M. Wojcik, E. Yanovich, B. Zatschler, I. Zhitnikov, S. V. Zhukov, D. Zinatulina, A. Zschocke, A. J. Zsigmond, K. Zuber, G. Zuzel, and GERDA collaboration

Subjects
Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract The GERmanium Detector Array (Gerda) collaboration searched for neutrinoless double- $$\beta $$ β decay in $$^{76}$$ 76 Ge using isotopically enriched high purity germanium detectors at the Laboratori Nazionali del Gran Sasso of INFN. After Phase I (2011–2013), the experiment benefited from several upgrades, including an additional active veto based on LAr instrumentation and a significant increase of mass by point-contact germanium detectors that improved the half-life sensitivity of Phase II (2015–2019) by an order of magnitude. At the core of the background mitigation strategy, the analysis of the time profile of individual pulses provides a powerful topological discrimination of signal-like and background-like events. Data from regular $$^{228}$$ 228 Th calibrations and physics data were both considered in the evaluation of the pulse shape discrimination performance. In this work, we describe the various methods applied to the data collected in Gerda Phase II corresponding to an exposure of 103.7 kg year. These methods suppress the background by a factor of about 5 in the region of interest around $$Q_{\beta \beta }= 2039$$ Q β β = 2039 keV, while preserving $$(81\pm 3)$$ ( 81 ± 3 ) % of the signal. In addition, an exhaustive list of parameters is provided which were used in the final data analysis.

Published
2022
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10. Calibration of the Gerda experiment

Author

M. Agostini, G. Araujo, A. M. Bakalyarov, M. Balata, I. Barabanov, L. Baudis, C. Bauer, E. Bellotti, S. Belogurov, A. Bettini, L. Bezrukov, V. Biancacci, E. Bossio, V. Bothe, V. Brudanin, R. Brugnera, A. Caldwell, C. Cattadori, A. Chernogorov, T. Comellato, V. D’Andrea, E. V. Demidova, N. Di Marco, E. Doroshkevich, F. Fischer, M. Fomina, A. Gangapshev, A. Garfagnini, C. Gooch, P. Grabmayr, V. Gurentsov, K. Gusev, J. Hakenmüller, S. Hemmer, R. Hiller, W. Hofmann, J. Huang, M. Hult, L. V. Inzhechik, J. Janicskó Csáthy, J. Jochum, M. Junker, V. Kazalov, Y. Kermaïdic, H. Khushbakht, T. Kihm, I. V. Kirpichnikov, A. Klimenko, R. Kneißl, K. T. Knöpfle, O. Kochetov, V. N. Kornoukhov, P. Krause, V. V. Kuzminov, M. Laubenstein, M. Lindner, I. Lippi, A. Lubashevskiy, B. Lubsandorzhiev, G. Lutter, C. Macolino, B. Majorovits, W. Maneschg, L. Manzanillas, M. Miloradovic, R. Mingazheva, M. Misiaszek, P. Moseev, Y. Müller, I. Nemchenok, L. Pandola, K. Pelczar, L. Pertoldi, P. Piseri, A. Pullia, C. Ransom, L. Rauscher, S. Riboldi, N. Rumyantseva, C. Sada, F. Salamida, S. Schönert, J. Schreiner, M. Schütt, A-K. Schütz, O. Schulz, M. Schwarz, B. Schwingenheuer, O. Selivanenko, E. Shevchik, M. Shirchenko, L. Shtembari, H. Simgen, A. Smolnikov, D. Stukov, A. A. Vasenko, A. Veresnikova, C. Vignoli, K. von Sturm, T. Wester, C. Wiesinger, M. Wojcik, E. Yanovich, B. Zatschler, I. Zhitnikov, S. V. Zhukov, D. Zinatulina, A. Zschocke, A. J. Zsigmond, K. Zuber, G. Zuzel, and Gerda Collaboration

Subjects
Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract The GERmanium Detector Array (Gerda) collaboration searched for neutrinoless double- $$\beta $$ β decay in $$^{76}$$ 76 Ge with an array of about 40 high-purity isotopically-enriched germanium detectors. The experimental signature of the decay is a monoenergetic signal at $$Q_{\beta \beta }$$ Q β β $$=2039.061(7)$$ = 2039.061 ( 7 ) keV in the measured summed energy spectrum of the two emitted electrons. Both the energy reconstruction and resolution of the germanium detectors are crucial to separate a potential signal from various backgrounds, such as neutrino-accompanied double- $$\beta $$ β decays allowed by the Standard Model. The energy resolution and stability were determined and monitored as a function of time using data from regular $$^{228}$$ 228 Th calibrations. In this work, we describe the calibration process and associated data analysis of the full Gerda dataset, tailored to preserve the excellent resolution of the individual germanium detectors when combining data over several years.

Published
2021
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11. On the interpretation of annual oscillations in 32Si and 36Cl decay rate measurements

Author

S. Pommé, K. Pelczar, K. Kossert, and I. Kajan

Subjects
Medicine, Science
Abstract

Abstract The 32Si decay rate measurement data of Alburger et al. obtained in 1982–1986 at Brookhaven National Laboratory have been presented repeatedly as evidence for solar neutrino-induced beta decay. The count rates show an annual sinusoidal oscillation of about 0.1% amplitude and maximum at February–March. Several authors have claimed that the annual oscillations could not be explained by environmental influences on the set-up, and they questioned the invariability of the decay constant. They hypothesised a correlation with changes in the solar neutrino flux due to annual variations in the Earth-Sun distance, in spite of an obvious mismatch in amplitude and phase. In this work, environmental conditions at the time of the experiment are presented. The 32Si decay rate measurements appear to be inversely correlated with the dew point in a nearby weather station. Susceptibility of the detection set-up to local temperature and humidity conditions is a likely cause of the observed instabilities in the measured decay rates. Similar conclusions apply to 36Cl decay rates measured at Ohio State University in 2005–2012.

Published
2021
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12. Characterization of inverted coaxial $$^{76}$$ 76 Ge detectors in GERDA for future double- $$\beta $$ β decay experiments

Author

M. Agostini, G. Araujo, A. M. Bakalyarov, M. Balata, I. Barabanov, L. Baudis, C. Bauer, E. Bellotti, S. Belogurov, A. Bettini, L. Bezrukov, V. Biancacci, E. Bossio, V. Bothe, V. Brudanin, R. Brugnera, A. Caldwell, C. Cattadori, A. Chernogorov, T. Comellato, V. D’Andrea, E. V. Demidova, N. Di Marco, E. Doroshkevich, F. Fischer, M. Fomina, A. Gangapshev, A. Garfagnini, C. Gooch, P. Grabmayr, V. Gurentsov, K. Gusev, J. Hakenmüller, S. Hemmer, W. Hofmann, J. Huang, M. Hult, L. V. Inzhechik, J. Janicskó Csáthy, J. Jochum, M. Junker, V. Kazalov, Y. Kermaïdic, H. Khushbakht, T. Kihm, I. V. Kirpichnikov, A. Klimenko, R. Kneißl, K. T. Knöpfle, O. Kochetov, V. N. Kornoukhov, P. Krause, V. V. Kuzminov, M. Laubenstein, M. Lindner, I. Lippi, A. Lubashevskiy, B. Lubsandorzhiev, G. Lutter, C. Macolino, B. Majorovits, W. Maneschg, L. Manzanillas, M. Miloradovic, R. Mingazheva, M. Misiaszek, P. Moseev, Y. Müller, I. Nemchenok, L. Pandola, K. Pelczar, L. Pertoldi, P. Piseri, A. Pullia, C. Ransom, L. Rauscher, S. Riboldi, N. Rumyantseva, C. Sada, F. Salamida, S. Schönert, J. Schreiner, M. Schütt, A.-K. Schütz, O. Schulz, M. Schwarz, B. Schwingenheuer, O. Selivanenko, E. Shevchik, M. Shirchenko, L. Shtembari, H. Simgen, A. Smolnikov, D. Stukov, A. A. Vasenko, A. Veresnikova, C. Vignoli, K. von Sturm, T. Wester, C. Wiesinger, M. Wojcik, E. Yanovich, B. Zatschler, I. Zhitnikov, S. V. Zhukov, D. Zinatulina, A. Zschocke, A. J. Zsigmond, K. Zuber, G. Zuzel, and Gerda Collaboration

Subjects
Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract Neutrinoless double- $$\beta $$ β decay of $$^{76}$$ 76 Ge is searched for with germanium detectors where source and detector of the decay are identical. For the success of future experiments it is important to increase the mass of the detectors. We report here on the characterization and testing of five prototype detectors manufactured in inverted coaxial (IC) geometry from material enriched to 88% in $$^{76}$$ 76 Ge. IC detectors combine the large mass of the traditional semi-coaxial Ge detectors with the superior resolution and pulse shape discrimination power of point contact detectors which exhibited so far much lower mass. Their performance has been found to be satisfactory both when operated in vacuum cryostat and bare in liquid argon within the Gerda setup. The measured resolutions at the Q-value for double- $$\beta $$ β decay of $$^{76}$$ 76 Ge ( $$Q_{\beta \beta }$$ Q β β = 2039 keV) are about 2.1 keV full width at half maximum in vacuum cryostat. After 18 months of operation within the ultra-low background environment of the GERmanium Detector Array (Gerda) experiment and an accumulated exposure of 8.5 kg $$\cdot $$ · year, the background index after analysis cuts is measured to be $$4.9^{+7.3}_{-3.4}\times 10^{-4} \ \text {counts}/(\text {keV} \cdot \text {kg} \cdot \text {year})$$ 4 . 9 - 3.4 + 7.3 × 10 - 4 counts / ( keV · kg · year ) around $$Q_{\beta \beta }$$ Q β β . This work confirms the feasibility of IC detectors for the next-generation experiment Legend.

Published
2021
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13. Separating $${^{39}\hbox {Ar}}$$ 39 Ar from $${^{40}\hbox {Ar}}$$ 40 Ar by cryogenic distillation with Aria for dark-matter searches

Author

P. Agnes, S. Albergo, I. F. M. Albuquerque, T. Alexander, A. Alici, A. K. Alton, P. Amaudruz, M. Arba, P. Arpaia, S. Arcelli, M. Ave, I. Ch. Avetissov, R. I. Avetisov, O. Azzolini, H. O. Back, Z. Balmforth, V. Barbarian, A. Barrado Olmedo, P. Barrillon, A. Basco, G. Batignani, A. Bondar, W. M. Bonivento, E. Borisova, B. Bottino, M. G. Boulay, G. Buccino, S. Bussino, J. Busto, A. Buzulutskov, M. Cadeddu, M. Cadoni, A. Caminata, E. V. Canesi, N. Canci, G. Cappello, M. Caravati, M. Cárdenas-Montes, N. Cargioli, M. Carlini, F. Carnesecchi, P. Castello, A. Castellani, S. Catalanotti, V. Cataudella, P. Cavalcante, S. Cavuoti, S. Cebrian, J. M. Cela Ruiz, B. Celano, S. Chashin, A. Chepurnov, C. Cicalò, L. Cifarelli, D. Cintas, F. Coccetti, V. Cocco, M. Colocci, E. Conde Vilda, L. Consiglio, S. Copello, J. Corning, G. Covone, P. Czudak, M. D’Aniello, S. D’Auria, M. D. Da Rocha Rolo, O. Dadoun, M. Daniel, S. Davini, A. De Candia, S. De Cecco, A. De Falco, G. De Filippis, D. De Gruttola, G. De Guido, G. De Rosa, M. Della Valle, G. Dellacasa, S. De Pasquale, A. V. Derbin, A. Devoto, L. Di Noto, F. Di Eusanio, C. Dionisi, P. Di Stefano, G. Dolganov, D. Dongiovanni, F. Dordei, M. Downing, T. Erjavec, S. Falciano, S. Farenzena, M. Fernandez Diaz, C. Filip, G. Fiorillo, A. Franceschi, D. Franco, E. Frolov, N. Funicello, F. Gabriele, C. Galbiati, M. Garbini, P. Garcia Abia, A. Gendotti, C. Ghiano, R. A. Giampaolo, C. Giganti, M. A. Giorgi, G. K. Giovanetti, M. L. Gligan, V. Goicoechea Casanueva, A. Gola, A. M. Goretti, R. Graciani Diaz, G. Y. Grigoriev, A. Grobov, M. Gromov, M. Guan, M. Guerzoni, M. Guetti, M. Gulino, C. Guo, B. R. Hackett, A. Hallin, M. Haranczyk, S. Hill, S. Horikawa, F. Hubaut, T. Hugues, E. V. Hungerford, An. Ianni, V. Ippolito, C. C. James, C. Jillings, P. Kachru, A. A. Kemp, C. L. Kendziora, G. Keppel, A. V. Khomyakov, A. Kish, I. Kochanek, K. Kondo, G. Korga, A. Kubankin, R. Kugathasan, M. Kuss, M. Kuźniak, M. La Commara, L. La Delfa, D. La Grasta, M. Lai, N. Lami, S. Langrock, M. Leyton, X. Li, L. Lidey, F. Lippi, M. Lissia, G. Longo, N. Maccioni, I. N. Machulin, L. Mapelli, A. Marasciulli, A. Margotti, S. M. Mari, J. Maricic, M. Marinelli, M. Martínez, A. D. Martinez Rojas, A. Martini, M. Mascia, M. Masetto, A. Masoni, A. Mazzi, A. B. McDonald, J. Mclaughlin, A. Messina, P. D. Meyers, T. Miletic, R. Milincic, R. Miola, A. Moggi, A. Moharana, S. Moioli, J. Monroe, S. Morisi, M. Morrocchi, E. N. Mozhevitina, T. Mróz, V. N. Muratova, A. Murenu, C. Muscas, L. Musenich, P. Musico, R. Nania, T. Napolitano, A. Navrer Agasson, M. Nessi, I. Nikulin, J. Nowak, A. Oleinik, V. Oleynikov, L. Pagani, M. Pallavicini, S. Palmas, L. Pandola, E. Pantic, E. Paoloni, G. Paternoster, P. A. Pegoraro, L. A. Pellegrini, C. Pellegrino, K. Pelczar, F. Perotti, V. Pesudo, E. Picciau, F. Pietropaolo, T. Pinna, A. Pocar, P. Podda, D. M. Poehlmann, S. Pordes, S. S. Poudel, P. Pralavorio, D. Price, F. Raffaelli, F. Ragusa, A. Ramirez, M. Razeti, A. Razeto, A. L. Renshaw, S. Rescia, M. Rescigno, F. Resnati, F. Retiere, L. P. Rignanese, C. Ripoli, A. Rivetti, J. Rode, L. Romero, M. Rossi, A. Rubbia, M. Rucaj, G. M. Sabiu, P. Salatino, O. Samoylov, E. Sánchez García, E. Sandford, S. Sanfilippo, V. A. Sangiorgio, V. Santacroce, D. Santone, R. Santorelli, A. Santucci, C. Savarese, E. Scapparone, B. Schlitzer, G. Scioli, D. A. Semenov, B. Shaw, A. Shchagin, A. Sheshukov, M. Simeone, P. Skensved, M. D. Skorokhvatov, O. Smirnov, B. Smith, A. Sokolov, R. Stefanizzi, A. Steri, S. Stracka, V. Strickland, M. Stringer, S. Sulis, Y. Suvorov, A. M. Szelc, J. Z. Szucs-Balazs, R. Tartaglia, G. Testera, T. N. Thorpe, A. Tonazzo, S. Torres-Lara, S. Tosti, A. Tricomi, M. Tuveri, E. V. Unzhakov, G. Usai, T. Vallivilayil John, S. Vescovi, T. Viant, S. Viel, A. Vishneva, R. B. Vogelaar, M. Wada, H. Wang, Y. Wang, S. Westerdale, R. J. Wheadon, L. Williams, Ma. M.Wojcik, Ma. Wojcik, X. Xiao, C. Yang, A. Zani, F. Zenobio, A. Zichichi, G. Zuzel, M. P. Zykova, and DarkSide-20k Collaboration

Subjects
Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract Aria is a plant hosting a $${350}\,\hbox {m}$$ 350 m cryogenic isotopic distillation column, the tallest ever built, which is being installed in a mine shaft at Carbosulcis S.p.A., Nuraxi-Figus (SU), Italy. Aria is one of the pillars of the argon dark-matter search experimental program, lead by the Global Argon Dark Matter Collaboration. It was designed to reduce the isotopic abundance of $${^{39}\hbox {Ar}}$$ 39 Ar in argon extracted from underground sources, called Underground Argon (UAr), which is used for dark-matter searches. Indeed, $${^{39}\hbox {Ar}}$$ 39 Ar is a $$\beta $$ β -emitter of cosmogenic origin, whose activity poses background and pile-up concerns in the detectors. In this paper, we discuss the requirements, design, construction, tests, and projected performance of the plant for the isotopic cryogenic distillation of argon. We also present the successful results of the isotopic cryogenic distillation of nitrogen with a prototype plant.

Published
2021
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14. SiPM-matrix readout of two-phase argon detectors using electroluminescence in the visible and near infrared range

Author

C. E. Aalseth, S. Abdelhakim, P. Agnes, R. Ajaj, I. F. M. Albuquerque, T. Alexander, A. Alici, A. K. Alton, P. Amaudruz, F. Ameli, J. Anstey, P. Antonioli, M. Arba, S. Arcelli, R. Ardito, I. J. Arnquist, P. Arpaia, D. M. Asner, A. Asunskis, M. Ave, H. O. Back, V. Barbaryan, A. Barrado Olmedo, G. Batignani, M. G. Bisogni, V. Bocci, A. Bondar, G. Bonfini, W. Bonivento, E. Borisova, B. Bottino, M. G. Boulay, R. Bunker, S. Bussino, A. Buzulutskov, M. Cadeddu, M. Cadoni, A. Caminata, N. Canci, A. Candela, C. Cantini, M. Caravati, M. Cariello, F. Carnesecchi, A. Castellani, P. Castello, P. Cavalcante, D. Cavazza, S. Cavuoti, S. Cebrian, J. M. Cela Ruiz, B. Celano, R. Cereseto, S. Chashin, W. Cheng, A. Chepurnov, C. Cicalò, L. Cifarelli, M. Citterio, F. Coccetti, V. Cocco, M. Colocci, E. Conde Vilda, L. Consiglio, F. Cossio, G. Covone, P. Crivelli, I. D’Antone, M. D’Incecco, M. D. Da Rocha Rolo, O. Dadoun, M. Daniel, S. Davini, S. De Cecco, M. De Deo, A. De Falco, D. De Gruttola, G. De Guido, G. De Rosa, G. Dellacasa, P. Demontis, S. De Pasquale, A. V. Derbin, A. Devoto, F. Di Eusanio, L. Di Noto, G. Di Pietro, P. Di Stefano, C. Dionisi, G. Dolganov, F. Dordei, M. Downing, F. Edalatfar, A. Empl, M. Fernandez Diaz, C. Filip, G. Fiorillo, K. Fomenko, A. Franceschi, D. Franco, E. Frolov, G. E. Froudakis, N. Funicello, F. Gabriele, A. Gabrieli, C. Galbiati, M. Garbini, P. Garcia Abia, D. Gascón Fora, A. Gendotti, C. Ghiano, A. Ghisi, P. Giampa, R. A. Giampaolo, C. Giganti, M. A. Giorgi, G. K. Giovanetti, M. L. Gligan, O. Gorchakov, M. Grab, R. Graciani Diaz, M. Grassi, J. W. Grate, A. Grobov, M. Gromov, M. Guan, M. B. B. Guerra, M. Guerzoni, M. Gulino, R. K. Haaland, B. R. Hackett, A. Hallin, M. Haranczyk, B. Harrop, E. W. Hoppe, S. Horikawa, B. Hosseini, F. Hubaut, P. Humble, E. V. Hungerford, An. Ianni, A. Ilyasov, V. Ippolito, C. Jillings, K. Keeter, C. L. Kendziora, I. Kochanek, K. Kondo, G. Kopp, D. Korablev, G. Korga, A. Kubankin, R. Kugathasan, M. Kuss, M. La Commara, L. La Delfa, M. Lai, M. Lebois, B. Lehnert, N. Levashko, X. Li, Q. Liqiang, M. Lissia, G. U. Lodi, G. Longo, R. Lussana, L. Luzzi, A. A. Machado, I. N. Machulin, A. Mandarano, S. Manecki, L. Mapelli, A. Margotti, S. M. Mari, M. Mariani, J. Maricic, M. Marinelli, D. Marras, M. Martínez, A. D. Martinez Rojas, M. Mascia, J. Mason, A. Masoni, A. B. McDonald, A. Messina, T. Miletic, R. Milincic, A. Moggi, S. Moioli, J. Monroe, M. Morrocchi, T. Mroz, W. Mu, V. N. Muratova, S. Murphy, C. Muscas, P. Musico, R. Nania, T. Napolitano, A. Navrer Agasson, M. Nessi, I. Nikulin, V. Nosov, J. A. Nowak, A. Oleinik, V. Oleynikov, M. Orsini, F. Ortica, L. Pagani, M. Pallavicini, S. Palmas, L. Pandola, E. Pantic, E. Paoloni, F. Pazzona, S. Peeters, P. A. Pegoraro, K. Pelczar, L. A. Pellegrini, C. Pellegrino, N. Pelliccia, F. Perotti, V. Pesudo, E. Picciau, F. Pietropaolo, A. Pocar, T. R. Pollmann, D. Portaluppi, S. S. Poudel, P. Pralavorio, D. Price, B. Radics, F. Raffaelli, F. Ragusa, M. Razeti, C. Regenfus, A. L. Renshaw, S. Rescia, M. Rescigno, F. Retiere, L. P. Rignanese, C. Ripoli, A. Rivetti, J. Rode, A. Romani, L. Romero, N. Rossi, A. Rubbia, P. Sala, P. Salatino, O. Samoylov, E. Sánchez García, E. Sandford, S. Sanfilippo, M. Sant, D. Santone, R. Santorelli, C. Savarese, E. Scapparone, B. Schlitzer, G. Scioli, E. Segreto, A. Seifert, D. A. Semenov, A. Shchagin, A. Sheshukov, S. Siddhanta, M. Simeone, P. N. Singh, P. Skensved, M. D. Skorokhvatov, O. Smirnov, G. Sobrero, A. Sokolov, A. Sotnikov, R. Stainforth, A. Steri, S. Stracka, V. Strickland, G. B. Suffritti, S. Sulis, Y. Suvorov, A. M. Szelc, R. Tartaglia, G. Testera, T. Thorpe, A. Tonazzo, A. Tosi, M. Tuveri, E. V. Unzhakov, G. Usai, A. Vacca, E. Vázquez-Jáuregui, T. Viant, S. Viel, F. Villa, A. Vishneva, R. B. Vogelaar, J. Wahl, J. J. Walding, H. Wang, Y. Wang, S. Westerdale, R. J. Wheadon, R. Williams, J. Wilson, Ma. M. Wojcik, Ma. Wojcik, S. Wu, X. Xiao, C. Yang, Z. Ye, M. Zuffa, G. Zuzel, and The DarkSide-20k collaboration

Subjects
Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract Proportional electroluminescence (EL) in noble gases is used in two-phase detectors for dark matter searches to record (in the gas phase) the ionization signal induced by particle scattering in the liquid phase. The “standard” EL mechanism is considered to be due to noble gas excimer emission in the vacuum ultraviolet (VUV). In addition, there are two alternative mechanisms, producing light in the visible and near infrared (NIR) ranges. The first is due to bremsstrahlung of electrons scattered on neutral atoms (“neutral bremsstrahlung”, NBrS). The second, responsible for electron avalanche scintillation in the NIR at higher electric fields, is due to transitions between excited atomic states. In this work, we have for the first time demonstrated two alternative techniques of the optical readout of two-phase argon detectors, in the visible and NIR range, using a silicon photomultiplier matrix and electroluminescence due to either neutral bremsstrahlung or avalanche scintillation. The amplitude yield and position resolution were measured for these readout techniques, which allowed to assess the detection threshold for electron and nuclear recoils in two-phase argon detectors for dark matter searches. To the best of our knowledge, this is the first practical application of the NBrS effect in detection science.

Published
2021
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15. An online radon monitor for low-background detector assembly facilities

Author

K. Pelczar, G. Zuzel, M. Wójcik, A. Pocar, and An. Ianni

Subjects
Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract Backgrounds from long-lived radon decay products are often problematic for low-energy neutrino and rare-event experiments. These isotopes, specifically $${}^{210}\hbox {Pb}$$ 210 Pb , $${}^{210}\hbox {Bi}$$ 210 Bi , and $${}^{210}\hbox {Po}$$ 210 Po , easily plate out onto surfaces exposed to radon-loaded air. The alpha emitter $${}^{210}\hbox {Po}$$ 210 Po is particularly dangerous for detectors searching for weakly-interacting dark matter particles. Neutrons produced via ( $$\upalpha $$ α , n) reactions in detector materials are, in some cases, a residual background that can limit the sensitivity of the experiment. An effective solution is to reduce the $${}^{222}\hbox {Rn}$$ 222 Rn activity in the air in contact with detector components during fabrication, assembly, commissioning, and operation. We present the design, construction, calibration procedures and performance of an electrostatic radon detector made to monitor two radon-suppressed clean rooms built for the DARKSIDE-50 experiment. A dedicated data acquisition system immune to harsh operating conditions of the radon monitor is also described. A record detection limit for $${}^{222}\hbox {Rn}$$ 222 Rn specific activity in air achieved by the device is $$0.05\,\hbox {mBqm}^{-3}$$ 0.05 mBqm - 3 (STP). The radon concentration of different air samples collected from the two DARKSIDE-50 clean rooms measured with the electrostatic detector is presented.

Published
2021
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16. On the recent claim of correlation between radioactive decay rates and space weather

Author

S. Pommé and K. Pelczar

Subjects
Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract In recent literature, several authors have challenged the validity of the exponential-decay law, based on observed variations in radioactive decay rate measurements beyond statistical accuracy. Tentative explanations have been sought in external interferences influencing the decay process, such as interactions of the nuclei with solar and cosmic neutrinos. Given the important implications of such statements on theoretical and practical level, one would expect that they are backed up with radionuclide metrology of the highest quality. In reality, they share the common traits of using poor metrology and incomplete uncertainty analysis with respect to the stability of the measurement technique. In this paper, new claims of correlations between decay rates and space weather are questioned.

Published
2020
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17. Modeling of GERDA Phase II data

Author

The GERDA collaboration, M. Agostini, A. M. Bakalyarov, M. Balata, I. Barabanov, L. Baudis, C. Bauer, E. Bellotti, S. Belogurov, A. Bettini, L. Bezrukov, D. Borowicz, E. Bossio, V. Bothe, V. Brudanin, R. Brugnera, A. Caldwell, C. Cattadori, A. Chernogorov, T. Comellato, V. D’Andrea, E. V. Demidova, N. Di Marco, A. Domula, E. Doroshkevich, V. Egorov, F. Fischer, M. Fomina, A. Gangapshev, A. Garfagnini, C. Gooch, P. Grabmayr, V. Gurentsov, K. Gusev, J. Hakenmüller, S. Hemmer, R. Hiller, W. Hofmann, M. Hult, L. V. Inzhechik, J. Janicskó Csáthy, J. Jochum, M. Junker, V. Kazalov, Y. Kermaïdic, T. Kihm, I. V. Kirpichnikov, A. Klimenko, R. Kneißl, K. T. Knöpfle, O. Kochetov, V. N. Kornoukhov, P. Krause, V. V. Kuzminov, M. Laubenstein, A. Lazzaro, M. Lindner, I. Lippi, A. Lubashevskiy, B. Lubsandorzhiev, G. Lutter, C. Macolino, B. Majorovits, W. Maneschg, M. Miloradovic, R. Mingazheva, M. Misiaszek, P. Moseev, I. Nemchenok, K. Panas, L. Pandola, K. Pelczar, L. Pertoldi, P. Piseri, A. Pullia, C. Ransom, S. Riboldi, N. Rumyantseva, C. Sada, F. Salamida, S. Schönert, J. Schreiner, M. Schütt, A-K. Schütz, O. Schulz, M. Schwarz, B. Schwingenheuer, O. Selivanenko, E. Shevchik, M. Shirchenko, H. Simgen, A. Smolnikov, D. Stukov, L. Vanhoefer, A. A. Vasenko, A. Veresnikova, C. Vignoli, K. von Sturm, T. Wester, C. Wiesinger, M. Wojcik, E. Yanovich, B. Zatschler, I. Zhitnikov, S. V. Zhukov, D. Zinatulina, A. Zschocke, A. J. Zsigmond, K. Zuber, and G. Zuzel

Subjects
Dark Matter and Double Beta Decay (experiments), Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract The GERmanium Detector Array (Gerda) experiment at the Gran Sasso underground laboratory (LNGS) of INFN is searching for neutrinoless double-beta (0νββ) decay of 76Ge. The technological challenge of Gerda is to operate in a “background-free” regime in the region of interest (ROI) after analysis cuts for the full 100 kg·yr target exposure of the experiment. A careful modeling and decomposition of the full-range energy spectrum is essential to predict the shape and composition of events in the ROI around Q ββ for the 0νββ search, to extract a precise measurement of the half-life of the double-beta decay mode with neutrinos (2νββ) and in order to identify the location of residual impurities. The latter will permit future experiments to build strategies in order to further lower the background and achieve even better sensitivities. In this article the background decomposition prior to analysis cuts is presented for Gerda Phase II. The background model fit yields a flat spectrum in the ROI with a background index (BI) of 16.04 − 0.85 + 0.78 · 10 − 3 $$ {16.04}_{-0.85}^{+0.78}\cdotp {10}^{-3} $$ cts/(keV·kg·yr) for the enriched BEGe data set and 14.68 − 0.52 + 0.47 · 10 − 3 $$ {14.68}_{-0.52}^{+0.47}\cdotp {10}^{-3} $$ cts/(keV·kg·yr) for the enriched coaxial data set. These values are similar to the one of Phase I despite a much larger number of detectors and hence radioactive hardware components.

Published
2020
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18. Rapidity distributions of Z = 1 isotopes and the nuclear symmetry energy from Sn+Sn collisions with radioactive beams at 270 MeV/nucleon

Author

M. Kaneko, T. Murakami, T. Isobe, M. Kurata-Nishimura, A. Ono, N. Ikeno, J. Barney, G. Cerizza, J. Estee, G. Jhang, J.W. Lee, W.G. Lynch, C. Santamaria, C.Y. Tsang, M.B. Tsang, R. Wang, D.S. Ahn, L. Atar, T. Aumann, H. Baba, K. Boretzky, J. Brzychczyk, N. Chiga, N. Fukuda, I. Gašparić, B. Hong, A. Horvat, T. Ichihara, K. Ieki, N. Inabe, Y.J. Kim, T. Kobayashi, Y. Kondo, P. Lasko, H.S. Lee, Y. Leifels, J. Łukasik, J. Manfredi, A.B. McIntosh, P. Morfouace, T. Nakamura, N. Nakatsuka, S. Nishimura, R. Olsen, H. Otsu, P. Pawłowski, K. Pelczar, D. Rossi, H. Sakurai, H. Sato, H. Scheit, R. Shane, Y. Shimizu, H. Simon, T. Sumikama, D. Suzuki, H. Suzuki, H. Takeda, S. Tangwancharoen, Y. Togano, H. Törnqvist, Z. Xiao, S.J. Yennello, J. Yurkon, and Y. Zhang

Subjects
Heavy radioactive isotope collisions, Cluster productions, Nuclear symmetry energy, Antisymmetrized molecular dynamics, Physics, QC1-999
Abstract

The rapidity distributions of hydrogen isotopes emitted from central collisions of neutron-rich 132Sn+124Sn and neutron-deficient 108Sn+112Sn systems at 270 MeV/nucleon were investigated at RIKEN-RIBF. The data are compared with antisymmetrized molecular dynamics (AMD) calculations and the rapidity distributions can be reproduced after adjusting the in-medium nucleon-nucleon cross sections. The double ratios between the two reaction systems taken for the relative yields of deuteron to proton (d/p) and triton to proton (t/p) are further examined in the midrapidity domain, where the adjustments in the AMD calculations do not affect much on them. The d/p and t/p double ratios at midrapidity agree well with the ratio of the system neutron numbers and its squared value, respectively, and the rapidity dependence of these double ratios is consistent with a picture of partial mixing of colliding nuclei. By comparing with the AMD model which shows a strong symmetry energy dependence of the t/p double ratio, the experimental result in the midrapidity domain favors the calculation with a symmetry-energy slope parameter around L=46 MeV rather than L=108 MeV.

Published
2021
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19. Characterization of 30 $$^{76}$$ 76 Ge enriched Broad Energy Ge detectors for GERDA Phase II

Author

M. Agostini, A. M. Bakalyarov, E. Andreotti, M. Balata, I. Barabanov, L. Baudis, N. Barros, C. Bauer, E. Bellotti, S. Belogurov, G. Benato, A. Bettini, L. Bezrukov, T. Bode, D. Borowicz, V. Brudanin, R. Brugnera, D. Budjáš, A. Caldwell, C. Cattadori, A. Chernogorov, V. D’Andrea, E. V. Demidova, N. Di Marco, A. Domula, E. Doroshkevich, V. Egorov, R. Falkenstein, K. Freund, A. Gangapshev, A. Garfagnini, C. Gooch, P. Grabmayr, V. Gurentsov, K. Gusev, J. Hakenmüller, A. Hegai, M. Heisel, S. Hemmer, R. Hiller, W. Hofmann, M. Hult, L. V. Inzhechik, J. Janicskó Csáthy, J. Jochum, M. Junker, V. Kazalov, Y. Kermaïdic, T. Kihm, I. V. Kirpichnikov, A. Kirsch, A. Kish, A. Klimenko, R. Kneißl, K. T. Knöpfle, O. Kochetov, V. N. Kornoukhov, V. V. Kuzminov, M. Laubenstein, A. Lazzaro, B. Lehnert, Y. Liao, M. Lindner, I. Lippi, A. Lubashevskiy, B. Lubsandorzhiev, G. Lutter, C. Macolino, B. Majorovits, W. Maneschg, G. Marissens, M. Miloradovic, R. Mingazheva, M. Misiaszek, P. Moseev, I. Nemchenok, K. Panas, L. Pandola, K. Pelczar, A. Pullia, C. Ransom, S. Riboldi, N. Rumyantseva, C. Sada, F. Salamida, M. Salathe, C. Schmitt, B. Schneider, S. Schönert, A.-K. Schütz, O. Schulz, B. Schwingenheuer, O. Selivanenko, E. Shevchik, M. Shirchenko, H. Simgen, A. Smolnikov, L. Stanco, L. Vanhoefer, A. A. Vasenko, A. Veresnikova, K. von Sturm, V. Wagner, A. Wegmann, T. Wester, C. Wiesinger, M. Wojcik, E. Yanovich, I. Zhitnikov, S. V. Zhukov, D. Zinatulina, A. J. Zsigmond, K. Zuber, G. Zuzel, and GERDA Collaboration

Subjects
Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract The GERmanium Detector Array (Gerda) is a low background experiment located at the Laboratori Nazionali del Gran Sasso in Italy, which searches for neutrinoless double-beta decay of $$^{76}$$ 76 Ge into $$^{76}$$ 76 Se+2e$$^-$$ - . Gerda has been conceived in two phases. Phase II, which started in December 2015, features several novelties including 30 new 76Ge enriched detectors. These were manufactured according to the Broad Energy Germanium (BEGe) detector design that has a better background discrimination capability and energy resolution compared to formerly widely-used types. Prior to their installation, the new BEGe detectors were mounted in vacuum cryostats and characterized in detail in the Hades underground laboratory in Belgium. This paper describes the properties and the overall performance of these detectors during operation in vacuum. The characterization campaign provided not only direct input for Gerda Phase II data collection and analyses, but also allowed to study detector phenomena, detector correlations as well as to test the accuracy of pulse shape simulation codes.

Published
2019
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20. Symmetry energy investigation with pion production from Sn+Sn systems

Author

G. Jhang, J. Estee, J. Barney, G. Cerizza, M. Kaneko, J.W. Lee, W.G. Lynch, T. Isobe, M. Kurata-Nishimura, T. Murakami, C.Y. Tsang, M.B. Tsang, R. Wang, D.S. Ahn, L. Atar, T. Aumann, H. Baba, K. Boretzky, J. Brzychczyk, N. Chiga, N. Fukuda, I. Gasparic, B. Hong, A. Horvat, K. Ieki, N. Inabe, Y.J. Kim, T. Kobayashi, Y. Kondo, P. Lasko, H.S. Lee, Y. Leifels, J. Łukasik, J. Manfredi, A.B. McIntosh, P. Morfouace, T. Nakamura, N. Nakatsuka, S. Nishimura, R. Olsen, H. Otsu, P. Pawłowski, K. Pelczar, D. Rossi, H. Sakurai, C. Santamaria, H. Sato, H. Scheit, R. Shane, Y. Shimizu, H. Simon, A. Snoch, A. Sochocka, Z. Sosin, T. Sumikama, H. Suzuki, D. Suzuki, H. Takeda, S. Tangwancharoen, H. Toernqvist, Y. Togano, Z.G. Xiao, S.J. Yennello, J. Yurkon, Y. Zhang, Maria Colonna, Dan Cozma, Paweł Danielewicz, Hannah Elfner, Natsumi Ikeno, Che Ming Ko, Justin Mohs, Dmytro Oliinychenko, Akira Ono, Jun Su, Yong Jia Wang, Hermann Wolter, Jun Xu, Ying-Xun Zhang, and Zhen Zhang

Subjects
Physics, QC1-999
Abstract

In the past two decades, pions created in the high density regions of heavy ion collisions have been predicted to be sensitive at high densities to the symmetry energy term in the nuclear equation of state, a property that is key to our understanding of neutron stars. In a new experiment designed to study the symmetry energy, the multiplicities of negatively and positively charged pions have been measured with high accuracy for central 132Sn+124Sn, 112Sn+124Sn, and 108Sn+112Sn collisions at E/A=270 MeV with the SπRIT Time Projection Chamber. While individual pion multiplicities are measured to 4% accuracy, those of the charged pion multiplicity ratios are measured to 2% accuracy. We compare these data to predictions from seven major transport models. The calculations reproduce qualitatively the dependence of the multiplicities and their ratios on the total neutron and proton number in the colliding systems. However, the predictions of the transport models from different codes differ too much to allow extraction of reliable constraints on the symmetry energy from the data. This finding may explain previous contradictory conclusions on symmetry energy constraints obtained from pion data in Au+Au system. These new results call for still better understanding of the differences among transport codes, and new observables that are more sensitive to the density dependence of the symmetry energy.

Published
2021
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21. Upgrade for Phase II of the Gerda experiment

Author

GERDA Collaboration, M. Agostini, A. M. Bakalyarov, M. Balata, I. Barabanov, L. Baudis, C. Bauer, E. Bellotti, S. Belogurov, S. T. Belyaev, G. Benato, A. Bettini, L. Bezrukov, T. Bode, D. Borowicz, V. Brudanin, R. Brugnera, A. Caldwell, C. Cattadori, A. Chernogorov, V. D’Andrea, E. V. Demidova, N. Di Marco, A. Domula, E. Doroshkevich, V. Egorov, R. Falkenstein, N. Frodyma, A. Gangapshev, A. Garfagnini, P. Grabmayr, V. Gurentsov, K. Gusev, J. Hakenmüller, A. Hegai, M. Heisel, S. Hemmer, R. Hiller, W. Hofmann, M. Hult, L. V. Inzhechik, L. Ioannucci, J. Janicskó Csáthy, J. Jochum, M. Junker, V. Kazalov, Y. Kermaïdic, T. Kihm, I. V. Kirpichnikov, A. Kirsch, A. Kish, A. Klimenko, R. Kneißl, K. T. Knöpfle, O. Kochetov, V. N. Kornoukhov, V. V. Kuzminov, M. Laubenstein, A. Lazzaro, V. I. Lebedev, B. Lehnert, M. Lindner, I. Lippi, A. Lubashevskiy, B. Lubsandorzhiev, G. Lutter, C. Macolino, B. Majorovits, W. Maneschg, E. Medinaceli, M. Miloradovic, R. Mingazheva, M. Misiaszek, P. Moseev, I. Nemchenok, S. Nisi, K. Panas, L. Pandola, K. Pelczar, A. Pullia, C. Ransom, S. Riboldi, N. Rumyantseva, C. Sada, F. Salamida, M. Salathe, C. Schmitt, B. Schneider, S. Schönert, J. Schreiner, A-K. Schütz, O. Schulz, B. Schwingenheuer, O. Selivanenko, E. Shevchik, M. Shirchenko, H. Simgen, A. Smolnikov, L. Stanco, L. Vanhoefer, A. A. Vasenko, A. Veresnikova, K. von Sturm, V. Wagner, A. Wegmann, T. Wester, C. Wiesinger, M. Wojcik, E. Yanovich, I. Zhitnikov, S. V. Zhukov, D. Zinatulina, A. J. Zsigmond, K. Zuber, and G. Zuzel

Subjects
Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract The Gerda collaboration is performing a sensitive search for neutrinoless double beta decay of $$^{76}\hbox {Ge}$$ 76Ge at the INFN Laboratori Nazionali del Gran Sasso, Italy. The upgrade of the Gerda experiment from Phase I to Phase II has been concluded in December 2015. The first Phase II data release shows that the goal to suppress the background by one order of magnitude compared to Phase I has been achieved. Gerda is thus the first experiment that will remain “background-free” up to its design exposure ($$\hbox {100 kg}~\hbox {year}$$ 100 kgyear ). It will reach thereby a half-life sensitivity of more than $$10^{26}$$ 1026 year within 3 years of data collection. This paper describes in detail the modifications and improvements of the experimental setup for Phase II and discusses the performance of individual detector components.

Published
2018
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22. Mitigation of $$^{42}$$ 42 Ar/$$^{42}$$ 42 K background for the GERDA Phase II experiment

Author

A. Lubashevskiy, M. Agostini, D. Budjáš, A. Gangapshev, K. Gusev, M. Heisel, A. Klimenko, A. Lazzaro, B. Lehnert, K. Pelczar, S. Schönert, A. Smolnikov, M. Walter, and G. Zuzel

Subjects
Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract Background coming from the $$^{42}$$ 42 Ar decay chain is considered to be one of the most relevant for the Gerda experiment, which searches for the neutrinoless double beta decay of $$^{76}$$ 76 Ge. The sensitivity strongly relies on the absence of background around the Q-value of the decay. Background coming from $$^{42}$$ 42 K, a progeny of $$^{42}$$ 42 Ar, can contribute to that background via electrons from the continuous spectrum with an endpoint at 3.5 MeV. Research and development on the suppression methods targeting this source of background were performed at the low-background test facility LArGe . It was demonstrated that by reducing $$^{42}$$ 42 K ion collection on the surfaces of the broad energy germanium detectors in combination with pulse shape discrimination techniques and an argon scintillation veto, it is possible to suppress $$^{42}$$ 42 K background by three orders of magnitude. This is sufficient for Phase II of the Gerda experiment.

Published
2018
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23. 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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24. 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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25. Neutrino-Induced Decay: A Critical Review of the Arguments

Author

S. Pommé and K. Pelczar

Subjects
Space and Planetary Science, Astronomy and Astrophysics
Abstract

There has been scientific debate about speculations that ‘neutrino-induced’ radioactive decay causes apparent violations of the exponential-decay law. Sturrock and others repeatedly publish papers asserting influences by solar and cosmic neutrinos on radioactive decay measurements and therefrom draw conclusions about space science that are highly speculative. Recurrent themes in their work are claims that the solar neutrino flux reveals oscillations at a monthly rate which can be linked to solar rotation, that annual and monthly oscillations occur in radioactive decay rates or directionality of emitted radiation which can be linked to variations in solar and cosmic neutrino flux hitting Earth’s surface, and that unstable radioactivity measurements can be used as a source of information about the interior of the Sun and dark matter. Radionuclide metrologists have extensively investigated and refuted their arguments. Metrological evidence shows that radioactive decay does not violate the exponential-decay law and is not a probe for variations in solar neutrino flux. In this review paper, the main arguments of Sturrock are listed and counterarguments are presented. Reference is made to earlier published work in which the evidence has been scrutinised in detail.

Published
2022

26. Isoscaling in central Sn+Sn collisions at 270 MeV/u

Author

J. W. Lee, M. B. Tsang, C. Y. Tsang, R. Wang, J. Barney, J. Estee, T. Isobe, M. Kaneko, M. Kurata-Nishimura, W. G. Lynch, T. Murakami, A. Ono, S. R. Souza, D. S. Ahn, L. Atar, T. Aumann, H. Baba, K. Boretzky, J. Brzychczyk, G. Cerizza, N. Chiga, N. Fukuda, I. Gasparic, B. Hong, A. Horvat, K. Ieki, N. Ikeno, N. Inabe, G. Jhang, Y. J. Kim, T. Kobayashi, Y. Kondo, P. Lasko, H. S. Lee, Y. Leifels, J. Łukasik, J. Manfredi, A. B. McIntosh, P. Morfouace, T. Nakamura, N. Nakatsuka, S. Nishimura, H. Otsu, P. Pawłowski, K. Pelczar, D. Rossi, H. Sakurai, C. Santamaria, H. Sato, H. Scheit, R. Shane, Y. Shimizu, H. Simon, A. Snoch, A. Sochocka, T. Sumikama, H. Suzuki, D. Suzuki, H. Takeda, S. Tangwancharoen, Y. Togano, Z. G. Xiao, S. J. Yennello, Y. Zhang, and (the S π RIT collaboration)

Subjects
Nuclear Theory (nucl-th), Nuclear and High Energy Physics, Nuclear Theory, FOS: Physical sciences, Nuclear Experiment (nucl-ex), Nuclear Experiment, Heavy radioactive isotope collisions, Cluster productions, Nuclear symmetry energy, Antisymmetrized molecular dynamics
Abstract

Experimental information on fragment emissions is important in understanding the dynamics of nuclear collisions and in the development of transport model simulating heavy-ion collisions. The composition of complex fragments emitted in the heavy-ion collisions can be explained by statistical models, which assume that thermal equilibrium is achieved at collision energies below 100 MeV/u. Our new experimental data together with theoretical analyses for light particles from Sn+Sn collisions at 270 MeV/u, suggest that the hypothesis of thermal equilibrium breaks down for particles emitted with high transfer momentum. To inspect the system's properties in such limit, the scaling features of the yield ratios of particles from two systems, a neutron-rich system of ${}^{132}\mathrm{Sn}+{}^{124}\mathrm{Sn}$ and a nearly symmetric system of ${}^{108}\mathrm{Sn}+{}^{112}\mathrm{Sn}$, are examined in the framework of the statistical multifragmentation model and the antisymmetrized molecular dynamics model. The isoscaling from low energy particles agree with both models. However the observed breakdown of isoscaling for particles with high transverse momentum cannot be explained by the antisymmetrized molecular dynamics model.

Published
2022

27. On the interpretation of annual oscillations in 32Si and 36Cl decay rate measurements

Author

K. Kossert, S. Pommé, K. Pelczar, and I. Kajan

Subjects
Physics, Solar physics, Multidisciplinary, Solar neutrino, Science, Phase (waves), Nuclear physics, Humidity, Flux, Atmospheric sciences, Beta decay, Article, Amplitude, Dew point, Astronomy and astrophysics, Medicine, High Energy Physics::Experiment, Exponential decay
Abstract

The 32Si decay rate measurement data of Alburger et al. obtained in 1982–1986 at Brookhaven National Laboratory have been presented repeatedly as evidence for solar neutrino-induced beta decay. The count rates show an annual sinusoidal oscillation of about 0.1% amplitude and maximum at February–March. Several authors have claimed that the annual oscillations could not be explained by environmental influences on the set-up, and they questioned the invariability of the decay constant. They hypothesised a correlation with changes in the solar neutrino flux due to annual variations in the Earth-Sun distance, in spite of an obvious mismatch in amplitude and phase. In this work, environmental conditions at the time of the experiment are presented. The 32Si decay rate measurements appear to be inversely correlated with the dew point in a nearby weather station. Susceptibility of the detection set-up to local temperature and humidity conditions is a likely cause of the observed instabilities in the measured decay rates. Similar conclusions apply to 36Cl decay rates measured at Ohio State University in 2005–2012.

Published
2021

28. 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

29. SiPM-matrix readout of two-phase argon detectors using electroluminescence in the visible and near infrared range

Author

F. Pietropaolo, Min-Xin Guan, S. Rescia, Federica Villa, F. Coccetti, A. Sheshukov, D. A. Semenov, Alberto Masoni, C. Savarese, F. Ameli, S. Bussino, Jocelyn Monroe, Paola Sala, Lelio Luzzi, R. Tartaglia, B. Hosseini, Chung-Yao Yang, I. Kochanek, Andrea Messina, S. Davini, A. V. Derbin, Paul H. Humble, V. Strickland, A. Franceschi, A. L. Hallin, P. Skensved, O. Smirnov, A. De Falco, C. Ripoli, E. Paoloni, B. Lehnert, E. Segreto, Laura A. Pellegrini, André Rubbia, Manuel Colocci, Aldo Ghisi, Marzio Nessi, V. Cocco, R. Graciani Diaz, Pietro Antonioli, M. G. Boulay, L. La Delfa, P. Cavalcante, V. Barbaryan, A.E. Bondar, W. Bonivento, C. Cantini, M. Lai, J. Mason, G. Fiorillo, Sara Sulis, L. P. Rignanese, T. N. Thorpe, Mariano Cadoni, T. Pollmann, E. V. Unzhakov, Q. Liqiang, Giovanni Covone, S. De Cecco, E. Scapparone, Andrea Gabrieli, Marino Simeone, C. Dionisi, N. Rossi, R. Stainforth, Mauro Marinelli, C. Regenfus, Gillian Kopp, Mauro Mariani, I. N. Machulin, G. De Guido, M. Lissia, Federico Perotti, S. S. Poudel, A. B. McDonald, G. Dellacasa, Carlo Muscas, M. Fernandez Diaz, Darren Price, George E. Froudakis, A. Oleinik, N. Canci, H. O. Back, G. De Rosa, O. Gorchakov, R. B. Vogelaar, G. K. Giovanetti, Simonetta Palmas, Marco Pallavicini, A. D. Martinez Rojas, W. Mu, V. Oleynikov, Paolo Attilio Pegoraro, F. Di Eusanio, M. Grab, An. Ianni, Rudi Lussana, G. L. Usai, Luciano Pandola, M. D. Skorokhvatov, E. Borisova, Pascal Pralavorio, F. Pazzona, M. Gromov, A. Grobov, M. M. Wojcik, G. Dolganov, S. Manecki, A. K. Alton, E. Frolov, J. Wahl, Anselmo Margotti, Xiang Xiao, I. Nikulin, Aldo Romani, Annalisa Vacca, E. Conde Vilda, O. Dadoun, V. N. Muratova, S. Cebrián, B. Bottino, M. L. Gligan, R. Milincic, J. A. Wilson, G. Zuzel, Thomas Alexander, M. D'Incecco, L. Romero, S. Murphy, C. L. Kendziora, A. Devoto, L. Di Noto, E. V. Hungerford, A. Asunskis, S. Westerdale, P. Agnes, Yanchu Wang, E. Sandford, B. Schlitzer, Stefania Moioli, C. Giganti, M. Downing, R. Santorelli, Rosario Nania, Alberto Tosi, Mario Patricio Padilla Martínez, A.V. Shchagin, A. Buzulutskov, M. Caravati, F. Raffaelli, P. Giampa, Davide Portaluppi, Fabrice Hubaut, C. J. Jillings, K. Pelczar, Cristiano Galbiati, L. Pagani, J. A. Nowak, A. Sotnikov, Y. Suvorov, M. Da Rocha Rolo, A. Ilyasov, Eric W. Hoppe, S. Abdelhakim, M. K. Daniel, J. Rode, L. Mapelli, F. Retiere, Han Wang, M. Garbini, D. De Gruttola, M. Haranczyk, R. Kugathasan, R. Bunker, Raffaele Ardito, V. Bocci, G. Di Pietro, Z. Ye, N. Funicello, A. S. Kubankin, D. Franco, A. Pocar, N. Levashko, W. Cheng, A. Mandarano, A. Caminata, V. Pesudo, F. Gabriele, Francesca Dordei, Pierre-Andre Amaudruz, A. Vishneva, F. Cossio, G. Batignani, A. Steri, M. Orsini, D. Santone, M. Ave, P. Garcia Abia, B. Celano, T. Mroz, Stefano Cavuoti, Francesco Ragusa, R. K. Haaland, A. Gendotti, Mario Giorgi, Jay W. Grate, Marcelo Braga Bueno Guerra, M. La Commara, A. M. Szelc, D. Gascon Fora, A. Castellani, S. Chashin, G. U. Lodi, Silvia Arcelli, E. Pantic, A. Tonazzo, Marco Sant, R. J. Wheadon, Maria Giuseppina Bisogni, M. Rescigno, Anton Empl, D. Cavazza, A. Navrer Agasson, R. Cereseto, M. Razeti, R. Ajaj, Nicomede Pelliccia, Xiujiang Li, S. Wu, M. Guerzoni, S. J. M. Peeters, Pasquale Arpaia, V. Nosov, J. Anstey, Craig E. Aalseth, Andrey Sokolov, Paolo Musico, Matteo Morrocchi, M. Cariello, E. Sanchez Garcia, T. Viant, A. Candela, M. Kuss, K. Kondo, S. Siddhanta, F. Edalatfar, G. Korga, M. Tuveri, A. A. Machado, C. Ghiano, B. R. Hackett, Gilda Scioli, I. J. Arnquist, C. Pellegrino, Giuseppe Longo, A. L. Renshaw, Valerio Ippolito, A. Moggi, F. Carnesecchi, L. Consiglio, Angelo Rivetti, S. Viel, Pierfranco Demontis, Andrea Alici, B. Harrop, O. Samoylov, P. Di Stefano, G. Bonfini, Piero Salatino, Richard M. Williams, G. Sobrero, M. Cadeddu, K. J. Keeter, Marco Grassi, A. Barrado Olmedo, E. Picciau, Ivone F. M. Albuquerque, S. Sanfilippo, Fausto Ortica, J. M. Cela Ruiz, C. Cicalò, T. Napolitano, P. N. Singh, Paolo Castello, S. Stracka, K. Fomenko, M. Zuffa, D. M. Asner, M. Lebois, B. Radics, L. Cifarelli, S. De Pasquale, Allen Seifert, Marisa Gulino, D. Marras, R. A. Giampaolo, J. Maricic, Michele Mascia, M. De Deo, M. Arba, S. Horikawa, I. D'Antone, S. M. Mari, A. S. Chepurnov, C. Filip, Mauro Citterio, Denis Korablev, E. Vázquez-Jáuregui, T. Miletic, Paolo Crivelli, J. Walding, G. Testera, Giuseppe Baldovino Suffritti, 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), 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 Fédératif de Recherche en Sciences et Ingénierie de la Santé (IFRESIS-ENSMSE), École des Mines de Saint-Étienne (Mines Saint-Étienne MSE), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-IFR143, Aalseth, C. E., Abdelhakim, S., Agnes, P., Ajaj, R., Albuquerque, I. F. M., Alexander, T., Alici, A., Alton, A. K., Amaudruz, P., Ameli, F., Anstey, J., Antonioli, P., Arba, M., Arcelli, S., Ardito, R., Arnquist, I. J., Arpaia, P., Asner, D. M., Asunskis, A., Ave, M., Back, H. O., Barbaryan, V., Barrado Olmedo, A., Batignani, G., Bisogni, M. G., Bocci, V., Bondar, A., Bonfini, G., Bonivento, W., Borisova, E., Bottino, B., Boulay, M. G., Bunker, R., Bussino, S., Buzulutskov, A., Cadeddu, M., Cadoni, M., Caminata, A., Canci, N., Candela, A., Cantini, C., Caravati, M., Cariello, M., Carnesecchi, F., Castellani, A., Castello, P., Cavalcante, P., Cavazza, D., Cavuoti, S., Cebrian, S., Cela Ruiz, J. M., Celano, B., Cereseto, R., Chashin, S., Cheng, W., Chepurnov, A., Cicalò, C., Cifarelli, L., Citterio, M., Coccetti, F., Cocco, V., Colocci, M., Conde Vilda, E., Consiglio, L., Cossio, F., Covone, G., Crivelli, P., D’Antone, I., D’Incecco, M., Da Rocha Rolo, M. D., Dadoun, O., Daniel, M., Davini, S., De Cecco, S., De Deo, M., De Falco, A., De Gruttola, D., De Guido, G., De Rosa, G., Dellacasa, G., Demontis, P., De Pasquale, S., Derbin, A. V., Devoto, A., Eusanio, F. Di, Di Noto, L., Di Pietro, G., Di Stefano, P., Dionisi, C., Dolganov, G., Dordei, F., Downing, M., Edalatfar, F., Empl, A., Fernandez Diaz, M., Filip, C., Fiorillo, G., Fomenko, K., Franceschi, A., Franco, D., Frolov, E., Froudakis, G. E., Funicello, N., Gabriele, F., Gabrieli, A., Galbiati, C., Garbini, M., Garcia Abia, P., Gascón Fora, D., Gendotti, A., Ghiano, C., Ghisi, A., Giampa, P., Giampaolo, R. A., Giganti, C., Giorgi, M. A., Giovanetti, G. K., Gligan, M. L., Gorchakov, O., Grab, M., Graciani Diaz, R., Grassi, M., Grate, J. W., Grobov, A., Gromov, M., Guan, M., Guerra, M. B. B., Guerzoni, M., Gulino, M., Haaland, R. K., Hackett, B. R., Hallin, A., Haranczyk, M., Harrop, B., Hoppe, E. W., Horikawa, S., Hosseini, B., Hubaut, F., Humble, P., Hungerford, E. V., Ianni, An., Ilyasov, A., Ippolito, V., Jillings, C., Keeter, K., Kendziora, C. L., Kochanek, I., Kondo, K., Kopp, G., Korablev, D., Korga, G., Kubankin, A., Kugathasan, R., Kuss, M., La Commara, M., La Delfa, L., Lai, M., Lebois, M., Lehnert, B., Levashko, N., Li, X., Liqiang, Q., Lissia, M., Lodi, G. U., Longo, G., Lussana, R., Luzzi, L., Machado, A. A., Machulin, I. N., Mandarano, A., Manecki, S., Mapelli, L., Margotti, A., Mari, S. M., Mariani, M., Maricic, J., Marinelli, M., Marras, D., Martínez, M., Martinez Rojas, A. D., Mascia, M., Mason, J., Masoni, A., Mcdonald, A. B., Messina, A., Miletic, T., Milincic, R., Moggi, A., Moioli, S., Monroe, J., Morrocchi, M., Mroz, T., Mu, W., Muratova, V. N., Murphy, S., Muscas, C., Musico, P., Nania, R., Napolitano, T., Navrer Agasson, A., Nessi, M., Nikulin, I., Nosov, V., Nowak, J. A., Oleinik, A., Oleynikov, V., Orsini, M., Ortica, F., Pagani, L., Pallavicini, M., Palmas, S., Pandola, L., Pantic, E., Paoloni, E., Pazzona, F., Peeters, S., Pegoraro, P. A., Pelczar, K., Pellegrini, L. A., Pellegrino, C., Pelliccia, N., Perotti, F., Pesudo, V., Picciau, E., Pietropaolo, F., Pocar, A., Pollmann, T. R., Portaluppi, D., Poudel, S. S., Pralavorio, P., Price, D., Radics, B., Raffaelli, F., Ragusa, F., Razeti, M., Regenfus, C., Renshaw, A. L., Rescia, S., Rescigno, M., Retiere, F., Rignanese, L. P., Ripoli, C., Rivetti, A., Rode, J., Romani, A., Romero, L., Rossi, N., Rubbia, A., Sala, P., Salatino, P., Samoylov, O., Sánchez García, E., Sandford, E., Sanfilippo, S., Sant, M., Santone, D., Santorelli, R., Savarese, C., Scapparone, E., Schlitzer, B., Scioli, G., Segreto, E., Seifert, A., Semenov, D. A., Shchagin, A., Sheshukov, A., Siddhanta, S., Simeone, M., Singh, P. N., Skensved, P., Skorokhvatov, M. D., Smirnov, O., Sobrero, G., Sokolov, A., Sotnikov, A., Stainforth, R., Steri, A., Stracka, S., Strickland, V., Suffritti, G. B., Sulis, S., Suvorov, Y., Szelc, A. M., Tartaglia, R., Testera, G., Thorpe, T., Tonazzo, A., Tosi, A., Tuveri, M., Unzhakov, E. V., Usai, G., Vacca, A., Vázquez-Jáuregui, E., Viant, T., Viel, S., Villa, F., Vishneva, A., Vogelaar, R. B., Wahl, J., Walding, J. J., Wang, H., Wang, Y., Westerdale, S., Wheadon, R. J., Williams, R., Wilson, J., Wojcik, Ma. M., Wojcik, Ma., Wu, S., Xiao, X., Yang, C., Ye, Z., Zuffa, M., Zuzel, G., Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-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)-Sorbonne Université (SU)-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), Aalseth C.E., Abdelhakim S., Agnes P., Ajaj R., Albuquerque I.F.M., Alexander T., Alici A., Alton A.K., Amaudruz P., Ameli F., Anstey J., Antonioli P., Arba M., Arcelli S., Ardito R., Arnquist I.J., Arpaia P., Asner D.M., Asunskis A., Ave M., Back H.O., Barbaryan V., Barrado Olmedo A., Batignani G., Bisogni M.G., Bocci V., Bondar A., Bonfini G., Bonivento W., Borisova E., Bottino B., Boulay M.G., Bunker R., Bussino S., Buzulutskov A., Cadeddu M., Cadoni M., Caminata A., Canci N., Candela A., Cantini C., Caravati M., Cariello M., Carnesecchi F., Castellani A., Castello P., Cavalcante P., Cavazza D., Cavuoti S., Cebrian S., Cela Ruiz J.M., Celano B., Cereseto R., Chashin S., Cheng W., Chepurnov A., Cicalo C., Cifarelli L., Citterio M., Coccetti F., Cocco V., Colocci M., Conde Vilda E., Consiglio L., Cossio F., Covone G., Crivelli P., D'Antone I., D'Incecco M., Da Rocha Rolo M.D., Dadoun O., Daniel M., Davini S., De Cecco S., De Deo M., De Falco A., De Gruttola D., De Guido G., De Rosa G., Dellacasa G., Demontis P., De Pasquale S., Derbin A.V., Devoto A., Eusanio F.D., Di Noto L., Di Pietro G., Di Stefano P., Dionisi C., Dolganov G., Dordei F., Downing M., Edalatfar F., Empl A., Fernandez Diaz M., Filip C., Fiorillo G., Fomenko K., Franceschi A., Franco D., Frolov E., Froudakis G.E., Funicello N., Gabriele F., Gabrieli A., Galbiati C., Garbini M., Garcia Abia P., Gascon Fora D., Gendotti A., Ghiano C., Ghisi A., Giampa P., Giampaolo R.A., Giganti C., Giorgi M.A., Giovanetti G.K., Gligan M.L., Gorchakov O., Grab M., Graciani Diaz R., Grassi M., Grate J.W., Grobov A., Gromov M., Guan M., Guerra M.B.B., Guerzoni M., Gulino M., Haaland R.K., Hackett B.R., Hallin A., Haranczyk M., Harrop B., Hoppe E.W., Horikawa S., Hosseini B., Hubaut F., Humble P., Hungerford E.V., Ianni A., Ilyasov A., Ippolito V., Jillings C., Keeter K., Kendziora C.L., Kochanek I., Kondo K., Kopp G., Korablev D., Korga G., Kubankin A., Kugathasan R., Kuss M., La Commara M., La Delfa L., Lai M., Lebois M., Lehnert B., Levashko N., Li X., Liqiang Q., Lissia M., Lodi G.U., Longo G., Lussana R., Luzzi L., Machado A.A., Machulin I.N., Mandarano A., Manecki S., Mapelli L., Margotti A., Mari S.M., Mariani M., Maricic J., Marinelli M., Marras D., Martinez M., Martinez Rojas A.D., Mascia M., Mason J., Masoni A., McDonald A.B., Messina A., Miletic T., Milincic R., Moggi A., Moioli S., Monroe J., Morrocchi M., Mroz T., Mu W., Muratova V.N., Murphy S., Muscas C., Musico P., Nania R., Napolitano T., Navrer Agasson A., Nessi M., Nikulin I., Nosov V., Nowak J.A., Oleinik A., Oleynikov V., Orsini M., Ortica F., Pagani L., Pallavicini M., Palmas S., Pandola L., Pantic E., Paoloni E., Pazzona F., Peeters S., Pegoraro P.A., Pelczar K., Pellegrini L.A., Pellegrino C., Pelliccia N., Perotti F., Pesudo V., Picciau E., Pietropaolo F., Pocar A., Pollmann T.R., Portaluppi D., Poudel S.S., Pralavorio P., Price D., Radics B., Raffaelli F., Ragusa F., Razeti M., Regenfus C., Renshaw A.L., Rescia S., Rescigno M., Retiere F., Rignanese L.P., Ripoli C., Rivetti A., Rode J., Romani A., Romero L., Rossi N., Rubbia A., Sala P., Salatino P., Samoylov O., Sanchez Garcia E., Sandford E., Sanfilippo S., Sant M., Santone D., Santorelli R., Savarese C., Scapparone E., Schlitzer B., Scioli G., Segreto E., Seifert A., Semenov D.A., Shchagin A., Sheshukov A., Siddhanta S., Simeone M., Singh P.N., Skensved P., Skorokhvatov M.D., Smirnov O., Sobrero G., Sokolov A., Sotnikov A., Stainforth R., Steri A., Stracka S., Strickland V., Suffritti G.B., Sulis S., Suvorov Y., Szelc A.M., Tartaglia R., Testera G., Thorpe T., Tonazzo A., Tosi A., Tuveri M., Unzhakov E.V., Usai G., Vacca A., Vazquez-Jauregui E., Viant T., Viel S., Villa F., Vishneva A., Vogelaar R.B., Wahl J., Walding J.J., Wang H., Wang Y., Westerdale S., Wheadon R.J., Williams R., Wilson J., Wojcik M.M., Wojcik M., Wu S., Xiao X., Yang C., Ye Z., Zuffa M., and Zuzel G.

Subjects
Physics - Instrumentation and Detectors, Physics and Astronomy (miscellaneous), Physics::Instrumentation and Detectors, 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), darkside, cmos, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Detectors and Experimental Techniques, sipm, physics.ins-det, Physics, ESPALHAMENTO, Bremsstrahlung, neutrinos, Noble gas, Instrumentation and Detectors (physics.ins-det), argon, photoluminescence, Astrophysics - Instrumentation and Methods for Astrophysics, physics, Particle Physics - Experiment, Astrophysics and Astronomy, Photomultiplier, SiPM readout two-phase argon detectors electroluminescence visible near infrared, FOS: Physical sciences, chemistry.chemical_element, lcsh:Astrophysics, physics, detector, cmos, dark matter, darkside, photoluminescence, sipm, radiation, neutrinos, argon, Electroluminescence, dark matter, Electron avalanche, Optics, Silicon photomultiplier, lcsh:QB460-466, 0103 physical sciences, lcsh:Nuclear and particle physics. Atomic energy. Radioactivity, 010306 general physics, Instrumentation and Methods for Astrophysics (astro-ph.IM), Engineering (miscellaneous), Scintillation, Argon, detector, hep-ex, 010308 nuclear & particles physics, business.industry, radiation, chemistry, lcsh:QC770-798, SiPM, dual-phase TPC, Darkside-20k, business, astro-ph.IM
Abstract

Proportional electroluminescence (EL) in noble gases is used in two-phase detectors for dark matter searches to record (in the gas phase) the ionization signal induced by particle scattering in the liquid phase. The "standard" EL mechanism is considered to be due to noble gas excimer emission in the vacuum ultraviolet (VUV). In addition, there are two alternative mechanisms, producing light in the visible and near infrared (NIR) ranges. The first is due to bremsstrahlung of electrons scattered on neutral atoms ("neutral bremsstrahlung", NBrS). The second, responsible for electron avalanche scintillation in the NIR at higher electric fields, is due to transitions between excited atomic states. In this work, we have for the first time demonstrated two alternative techniques of the optical readout of two-phase argon detectors, in the visible and NIR range, using a silicon photomultiplier matrix and electroluminescence due to either neutral bremsstrahlung or avalanche scintillation. The amplitude yield and position resolution were measured for these readout techniques, which allowed to assess the detection threshold for electron and nuclear recoils in two-phase argon detectors for dark matter searches. To the best of our knowledge, this is the first practical application of the NBrS effect in detection science., Comment: 26 pages, 22 figures, 3 tables

Published
2021

30. Measurement of the

Author

I, Kajan, S, Pommé, K, Pelczar, and S, Heinitz

Abstract

The half-life of

Published
2021

31. Separating $${^{39}\hbox {Ar}}$$ from $${^{40}\hbox {Ar}}$$ by cryogenic distillation with Aria for dark-matter searches

Author

T. Napolitano, Stefano Cavuoti, A.E. Bondar, H. O. Back, G. De Rosa, Silvia Arcelli, A. Navrer Agasson, Jocelyn Monroe, M. Della Valle, Min-Xin Guan, M. Garbini, Francesca Dordei, Pierre-Andre Amaudruz, M. Gromov, M. Carlini, A. M. Goretti, A. Vishneva, E. V. Hungerford, V. Pesudo, P. Garcia Abia, Paolo Castello, S. Torres-Lara, S. Stracka, S. Westerdale, Mario Giorgi, Lance S. Lidey, R. Stefanizzi, G. Fiorillo, T. Erjavec, M. La Commara, A. M. Szelc, O. Dadoun, T. Hugues, Han Wang, D. Dongiovanni, S. Copello, A. Barrado Olmedo, Manuel Colocci, Giovanni Paternoster, Federico Perotti, F. Pietropaolo, S. Rescia, M. Razeti, A. Oleinik, A. Santucci, Sara Sulis, L. P. Rignanese, C. Cicalo, A. Sheshukov, Filippo Resnati, A. Marasciulli, C. Savarese, G. Dolganov, Chung-Yao Yang, Andrea Messina, A. V. Derbin, M. Wada, S. Davini, Alessia Tricomi, F. Coccetti, Thomas Alexander, Angelo Rivetti, Eugenio Scapparone, A. L. Hallin, N. Maccioni, M. Rossi, E. V. Canesi, P. D. Meyers, T. Vallivilayil John, V. N. Muratova, V. Goicoechea Casanueva, E. Picciau, Ivone F. M. Albuquerque, D. A. Semenov, P. Di Stefano, Mariano Cadoni, B. Celano, G. K. Giovanetti, Yanchu Wang, K. Kondo, A. Grobov, N. Canci, M. Kuźniak, L. Romero, Z. Balmforth, S. Tosti, S. Farenzena, L. Pagani, Marino Simeone, T. Miletic, D. Franco, A. Devoto, A. Mazzi, Carlo Muscas, V. Cocco, S. Chashin, G. De Guido, P. Kachru, M. Lissia, Gilda Scioli, Valerio Ippolito, V. Strickland, A. K. Alton, E. Frolov, G. Korga, A. L. Renshaw, S. Sanfilippo, M. Rescigno, G. De Filippis, A. Moggi, R. Graciani Diaz, Luisa Cifarelli, S. De Pasquale, A. de Candia, E. Pantic, D. Cintas, J. B. McLaughlin, M. Stringer, Alberto Masoni, S. Cebrián, Marzio Nessi, E. Sandford, B. Schlitzer, E. Sanchez Garcia, Stefania Moioli, S. Bussino, C. J. Jillings, Piero Salatino, M. M. Wojcik, R. Miola, S. Viel, A. D. Martinez Rojas, M. Fernandez Diaz, Darren Price, D. De Gruttola, M. D’Aniello, A. Murenu, C. James, S. De Cecco, Giuseppe Longo, L. Mapelli, Paolo Attilio Pegoraro, E. Conde Vilda, Anselmo Margotti, Xiang Xiao, Andrea Alici, C. Ripoli, E. Paoloni, Miguel Cárdenas-Montes, A. Razeto, Pasquale Arpaia, T. N. Thorpe, C. Guo, M. Cadeddu, B. Shaw, A. Basco, G. M. Sabiu, M. P. Zykova, L. Williams, R. I. Avetisov, D. M. Poehlmann, Y. Suvorov, P. Barrillon, A. Kish, I. N. Machulin, R. B. Vogelaar, An. Ianni, A. Martini, A.V. Shchagin, S. Vescovi, A. Buzulutskov, M. Da Rocha Rolo, P. Czudak, T. Viant, Marisa Gulino, Saverio D'Auria, M. K. Daniel, F. Retiere, Marco Pallavicini, B. Bottino, V. A. Sangiorgio, G. Zuzel, Jose Busto, C. Pellegrino, Gigi Cappello, B. Smith, S. Morisi, Vittorio Cataudella, S. S. Poudel, R. A. Giampaolo, J. Maricic, L. Musenich, Simonetta Palmas, F. Lippi, Francesco Ragusa, N. Cargioli, Michele Mascia, A. Gendotti, M. Lai, M. Leyton, O. Smirnov, M. Tuveri, G. Y. Grigoriev, I. Nikulin, Xiujiang Li, T. Pinna, M. I. Martínez, M. Downing, Rosario Nania, M. Masetto, Matteo Morrocchi, M. Kuss, N. Funicello, C. Giganti, G. Batignani, M. Ave, A. Castellani, M. G. Boulay, G. Testera, J. A. Nowak, J. Z. Szucs-Balazs, M. Arba, E. V. Unzhakov, S. Horikawa, S. M. Mari, A. S. Chepurnov, C. Filip, Sebastiano Albergo, M. D. Skorokhvatov, S. Pordes, G. L. Usai, M. L. Gligan, L. La Delfa, F. Raffaelli, A. Moharana, R. Milincic, A. Pocar, A. Franceschi, A. A. Kemp, A. De Falco, R. Santorelli, J. M. Corning, M. Guetti, A. V. Khomyakov, A. S. Kubankin, R. Tartaglia, G. Buccino, P. Skensved, André Rubbia, T. Mroz, E. Borisova, Pascal Pralavorio, Giovanni Covone, K. Pelczar, Cristiano Galbiati, G. Dellacasa, Giorgio Keppel, S. Langrock, C. L. Kendziora, S. Hill, M. Caravati, F. Carnesecchi, Fabrice Hubaut, R. Kugathasan, Luciano Pandola, A. Caminata, M. Rucaj, R. J. Wheadon, O. Azzolini, F. Gabriele, A. Tonazzo, C. Dionisi, P. Podda, I. Kochanek, J. Rode, M. Guerzoni, Laura A. Pellegrini, Paolo Musico, W. Bonivento, I. Ch. Avetissov, Mauro Marinelli, E. N. Mozhevitina, Andrey Sokolov, B. R. Hackett, A. B. McDonald, F. Zenobio, C. Ghiano, V. Oleynikov, F. Di Eusanio, L. Consiglio, O. Samoylov, P. Cavalcante, L. Di Noto, D. Santone, P. Agnes, S. Falciano, A. Ramirez, M. Haranczyk, S. Catalanotti, Andrea Zani, Antonino Zichichi, V. Santacroce, J. M. Cela Ruiz, D. La Grasta, V. Barbarian, N. Lami, Alberto Gola, and A. Steri

Subjects
Physics, Air separation, Argon, Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, Dark matter, chemistry.chemical_element, Natural abundance, 01 natural sciences, Nuclear physics, chemistry, Fractionating column, 0103 physical sciences, 010306 general physics, Engineering (miscellaneous)
Abstract

Aria is a plant hosting a$${350}\,\hbox {m}$$350mcryogenic isotopic distillation column, the tallest ever built, which is being installed in a mine shaft at Carbosulcis S.p.A., Nuraxi-Figus (SU), Italy. Aria is one of the pillars of the argon dark-matter search experimental program, lead by the Global Argon Dark Matter Collaboration. It was designed to reduce the isotopic abundance of$${^{39}\hbox {Ar}}$$39Arin argon extracted from underground sources, called Underground Argon (UAr), which is used for dark-matter searches. Indeed,$${^{39}\hbox {Ar}}$$39Aris a$$\beta $$β-emitter of cosmogenic origin, whose activity poses background and pile-up concerns in the detectors. In this paper, we discuss the requirements, design, construction, tests, and projected performance of the plant for the isotopic cryogenic distillation of argon. We also present the successful results of the isotopic cryogenic distillation of nitrogen with a prototype plant.

Published
2021

32. Probing the symmetry energy with the spectral pion ratio

Author

Naohiro Inabe, Y. Leifels, J. Estee, P. Morfouace, mrow, Piotr Pawłowski, W. G. Lynch, Kazuo Ieki, H. Scheit, Thomas Aumann, Nobuyuki Chiga, D. M. Rossi, Yasuhiro Togano, C.Y. Tsang, J. Łukasik, Byung-Sik Hong, H.S. Lee, Hiroyoshi Sakurai, G. Jhang, A. Snoch, K. Pelczar, Jongmin Lee, T. Isobe, mi> π, H. Toernqvist, C. Santamaria, Hidetada Baba, L. Atar, G. Cerizza, Takashi Nakamura, N. Fukuda, Y. M. Zhang, R. Wang, K. Boretzky, S. Nishimura, M. Kurata-Nishimura, mi> Rit, A. Horvat, M. B. Tsang, H. Sato, Noritsugu Nakatsuka, Alan McIntosh, Anna Sochocka, Toshiyuki Sumikama, J. J. Manfredi, Igor Gašparić, D. Suzuki, Yosuke Kondo, Y. Shimizu, Zhigang Xiao, Sherry Yennello, T. Kobayashi, S. Tangwancharoen, Hideaki Otsu, J. Barney, Rebecca Shane, T. Murakami, Hiroyuki Takeda, Herbert A. Simon, M.D. Cozma, J. Brzychczyk, M. Kaneko, D.S. Ahn, Y.J. Kim, H. Suzuki, and P. Lasko

Subjects
Physics, Equation of state, Proton, Isotope, Nuclear Theory, FOS: Physical sciences, General Physics and Astronomy, 01 natural sciences, Symmetry (physics), Spectral line, Neutron star, Pion, 0103 physical sciences, Physics::Accelerator Physics, Neutron, Nuclear Experiment (nucl-ex), Atomic physics, Nuclear Experiment, 010306 general physics
Abstract

Many neutron star (NS) properties, such as the proton fraction within a NS, reflect the symmetry energy contributions to the Equation of State that dominate when neutron and proton densities differ strongly. To constrain these contributions at supra-saturation densities, we measure the spectra of charged pions produced by colliding rare isotope tin (Sn) beams with isotopically enriched Sn targets. Using ratios of the charged pion spectra measured at high transverse momenta, we deduce the slope of the symmetry energy to be $42 < L < 117$ MeV. This value is slightly lower but consistent with the $L$ values deduced from a recent measurement of the neutron skin thickness of $^{208}$Pb.

Published
2021

33. Calibration of the Gerda experiment

Author

T. Wester, A.A. Smolnikov, E. V. Demidova, J. Janicskó Csáthy, C. Cattadori, Anna Julia Zsigmond, Kai Zuber, A. V. Veresnikova, D. R. Zinatulina, A. Chernogorov, R. Hiller, T. Comellato, S. Belogurov, I. Zhitnikov, R. Mingazheva, B. Schwingenheuer, C. Bauer, P. Krause, Igor Nemchenok, Stefano Riboldi, L. Shtembari, Bela Majorovits, I. V. Kirpichnikov, Paolo Piseri, J. Huang, O.I. Kochetov, Mikael Hult, M. Misiaszek, M. Miloradovic, Laura Baudis, M. Fomina, S. Hemmer, J. Hakenmüller, G. R. Araujo, S. Schönert, A. M. Gangapshev, C. Vignoli, A. Garfagnini, M. Schütt, Werner Hofmann, O. Schulz, R. Kneißl, I. R. Barabanov, L. Manzanillas, C. Gooch, S. V. Zhukov, Josef Jochum, A. Lubashevskiy, Y. Kermaïdic, K. N. Gusev, V. D'Andrea, K. T. Knöpfle, Ivano Lippi, D. Stukov, Allen Caldwell, C. Wiesinger, V. I. Gurentsov, M. Balata, M. Shirchenko, R. Brugnera, L. B. Bezrukov, K. von Sturm, Bayarto Lubsandorzhiev, V. B. Brudanin, E. Bossio, A. A. Vasenko, E. Shevchik, V. V. Kazalov, V. V. Kuzminov, L. V. Inzhechik, A. Pullia, Franz Dieter Fischer, E. Doroshkevich, Matteo Agostini, F. Salamida, Cinzia Sada, B. Zatschler, M. M. Wojcik, W. Maneschg, E. A. Yanovich, E. Bellotti, M. Schwarz, C. Ransom, Hardy Simgen, G. Zuzel, L. Pertoldi, A.-K. Schütz, N. Di Marco, M. Junker, Manfred Lindner, O. Selivanenko, C. Macolino, M. Laubenstein, V. N. Kornoukhov, V. Bothe, K. Pelczar, Alessandro Bettini, Y. Müller, Guillaume Lutter, A. M. Bakalyarov, Jochen Schreiner, Th. Kihm, V. Biancacci, H. Khushbakht, P. Moseev, Luciano Pandola, L. Rauscher, A. A. Klimenko, A. Zschocke, N. Rumyantseva, P. Grabmayr, and GERDA Collaboration

Subjects
Physics - Instrumentation and Detectors, Physics and Astronomy (miscellaneous), Regular Article - Experimental Physics, Physics::Instrumentation and Detectors, chemistry.chemical_element, FOS: Physical sciences, Germanium, Electron, QC770-798, Astrophysics, 01 natural sciences, Standard Model, Nuclear physics, Nuclear and particle physics. Atomic energy. Radioactivity, 0103 physical sciences, Calibration, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, Engineering (miscellaneous), Physics, 010308 nuclear & particles physics, Resolution (electron density), Detector, Instrumentation and Detectors (physics.ins-det), Semiconductor detector, QB460-466, chemistry, GERDA - Abteilung Hinton, High Energy Physics::Experiment, Energy (signal processing)
Abstract

The GERmanium Detector Array (GERDA) collaboration searched for neutrinoless double-$\beta$ decay in $^{76}$Ge with an array of about 40 high-purity isotopically-enriched germanium detectors. The experimental signature of the decay is a monoenergetic signal at Q$_{\beta\beta}$ = 2039.061(7)keV in the measured summed energy spectrum of the two emitted electrons. Both the energy reconstruction and resolution of the germanium detectors are crucial to separate a potential signal from various backgrounds, such as neutrino-accompanied double-$\beta$ decays allowed by the Standard Model. The energy resolution and stability were determined and monitored as a function of time using data from regular $^{228}$Th calibrations. In this work, we describe the calibration process and associated data analysis of the full GERDA dataset, tailored to preserve the excellent resolution of the individual germanium detectors when combining data over several years., Comment: 12 pages, 7 figures

Published
2021

34. Rapidity distributions of Z = 1 isotopes and the nuclear symmetry energy from Sn+Sn collisions with radioactive beams at 270 MeV/nucleon

Author

G. Cerizza, Byung-Sik Hong, Naohito Inabe, Piotr Pawłowski, P. Lasko, Toshiyuki Sumikama, T. Isobe, H. Sato, Noritsugu Nakatsuka, Akira Ono, T. Kobayashi, Yosuke Kondo, Alan McIntosh, P. Morfouace, D. M. Rossi, Jongmin Lee, N. Fukuda, Sherry Yennello, Kazuo Ieki, D.S. Ahn, J. Estee, H. Baba, J. Barney, Igor Gašparić, W. G. Lynch, D. Suzuki, J. Brzychczyk, Thomas Aumann, Hiroyuki Takeda, John Yurkon, A. Horvat, S. Nishimura, M. Kaneko, Hiroyoshi Sakurai, Y. M. Zhang, Yasuhiro Togano, S. Tangwancharoen, Zhigang Xiao, R. Olsen, M. Kurata-Nishimura, C.Y. Tsang, J. Łukasik, M. B. Tsang, K. Pelczar, Y. Leifels, Herbert A. Simon, N. Ikeno, J. J. Manfredi, Nobuyuki Chiga, R. Wang, C. Santamaria, H. Törnqvist, K. Boretzky, Hideaki Otsu, Rebecca Shane, G. Jhang, T. Ichihara, T. Murakami, Takashi Nakamura, H. Suzuki, H.S. Lee, Yohei Shimizu, Y.J. Kim, H. Scheit, and L. Atar

Subjects
Nuclear and High Energy Physics, Hydrogen, Proton, QC1-999, Nuclear Theory, chemistry.chemical_element, Nuclear physics, Antisymmetrized molecular dynamics, cluster productions, ddc:530, Rapidity, Neutron, Nuclear Experiment, Physics, Isotope, heavy radioactive isotope collisions, antisymmetrized molecular dynamics, Cluster productions, Heavy radioactive isotope collisions, Nuclear symmetry energy, Symmetry (physics), chemistry, Deuterium, nuclear symmetry energy, Nucleon
Abstract

Physics letters / B 822, 136681 (2021). doi:10.1016/j.physletb.2021.136681, Published by North-Holland Publ., Amsterdam

Published
2021

35. Final Results of GERDA on the Search for Neutrinoless Double-ß Decay

Author

V. I. Gurentsov, Bayarto Lubsandorzhiev, A. Lubashevskiy, T. Wester, A. A. Vasenko, A.A. Smolnikov, J. Huang, O.I. Kochetov, J. Janicskó Csáthy, R. Mingazheva, C. Cattadori, Anna Julia Zsigmond, Kai Zuber, A. M. Gangapshev, B. Schwingenheuer, R. Brugnera, V. V. Kuzminov, Matteo Agostini, V. V. Kazalov, O. Schulz, E. Doroshkevich, Franz Dieter Fischer, A.-K. Schütz, I. Zhitnikov, I. V. Kirpichnikov, Werner Hofmann, N. Di Marco, Paolo Piseri, G. R. Araujo, D. R. Zinatulina, A. Lazzaro, D. Stukov, M. Schwarz, M. Miloradovic, Allen Caldwell, A. Garfagnini, W. Maneschg, S. Schönert, Josef Jochum, E. A. Yanovich, M. Balata, C. Bauer, Stefano Riboldi, L. Shtembari, F. Salamida, Manfred Lindner, V.B. Brudanin, C. Ransom, Hardy Simgen, I. R. Barabanov, V. D'Andrea, C. Gooch, S. V. Zhukov, P. Krause, Igor Nemchenok, Mikael Hult, K. Panas, K. von Sturm, Bela Majorovits, K. N. Gusev, J. Hakenmüller, M. Misiaszek, R. Kneißl, K. T. Knöpfle, L. Manzanillas, E. V. Demidova, T. Comellato, L. Pertoldi, S. Hemmer, Y. Kermaïdic, Laura Baudis, A. Pullia, G. Zuzel, O. Selivanenko, S. Belogurov, Ivano Lippi, C. Wiesinger, A. V. Veresnikova, M. Shirchenko, A. Chernogorov, M. Fomina, R. Hiller, E. Bossio, M. Schütt, D. Borowicz, L. V. Inzhechik, Cinzia Sada, B. Zatschler, P. Grabmayr, Alessandro Bettini, Y. Müller, C. Macolino, V. Bothe, V. N. Kornoukhov, K. Pelczar, M. Junker, C. Vignoli, Guillaume Lutter, A. M. Bakalyarov, L. Rauscher, A. Zschocke, Jochen Schreiner, V. Biancacci, L. B. Bezrukov, E. Shevchik, M. M. Wojcik, E. Bellotti, Th. Kihm, H. Khushbakht, P. Moseev, Luciano Pandola, A. A. Klimenko, N. Rumyantseva, M. Laubenstein, and GERDA collaboration

Subjects
Physics, Physics - Instrumentation and Detectors, Signal region, General Physics and Astronomy, chemistry.chemical_element, Germanium, 7. Clean energy, 01 natural sciences, Cosmology, High Energy Physics - Experiment, 3. Good health, Semiconductor detector, Nuclear physics, chemistry, GE-76, 0103 physical sciences, GERDA - Abteilung Hinton, Liquid argon, Beta (velocity), SHAPE, High Energy Physics::Experiment, Sensitivity (control systems), 010306 general physics, Nuclear Experiment, Diode
Abstract

The GERmanium Detector Array (GERDA) experiment searched for the lepton-number-violating neutrinoless double-$\beta$ ($0\nu\beta\beta$) decay of $^{76}$Ge, whose discovery would have far-reaching implications in cosmology and particle physics. By operating bare germanium diodes, enriched in $^{76}$Ge, in an active liquid argon shield, GERDA achieved an unprecedently low background index of $5.2\times10^{-4}$ counts/(keV$\cdot$kg$\cdot$yr) in the signal region and met the design goal to collect an exposure of 100 kg$\cdot$yr in a background-free regime. When combined with the result of Phase I, no signal is observed after 127.2 kg$\cdot$yr of total exposure. A limit on the half-life of $0\nu\beta\beta$ decay in $^{76}$Ge is set at $T_{1/2}>1.8\times10^{26}$ yr at 90% C.L., which coincides with the sensitivity assuming no signal., Comment: 7 pages, 3 figures, submitted to Physical Review Letters

Published
2020

36. Role of ambient humidity underestimated in research on correlation between radioactive decay rates and space weather

Author

S. Pommé and K. Pelczar

Subjects
Multidisciplinary, FOS: Physical sciences, Nuclear Experiment (nucl-ex), Astrophysics - Instrumentation and Methods for Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM), Nuclear Experiment
Abstract

In recent work, Milian-Sanchez et al. observed fluctuations in radioactive decay rate measurement series, and after excluding environmental influences (measured indoors) as root causes, they looked for possible correlations with astrophysical variables. In spite of the authors efforts to investigate possible influences of environmental parameters (such as ambient temperature, pressure and humidity) on the detectors stability, it turns out that the influence of ambient humidity on the instrumentation has been underestimated., 6 pages, 1 figure

Published
2020

37. On the recent claim of correlation between radioactive decay rates and space weather

Author

K. Pelczar and S. Pommé

Subjects
Physics, COSMIC cancer database, Physics and Astronomy (miscellaneous), lcsh:Astrophysics, Space weather, 01 natural sciences, Stability (probability), Metrology, 010309 optics, lcsh:QB460-466, 0103 physical sciences, Econometrics, lcsh:QC770-798, Quality (philosophy), lcsh:Nuclear and particle physics. Atomic energy. Radioactivity, Neutrino, 010306 general physics, Engineering (miscellaneous), Radioactive decay, Uncertainty analysis
Abstract

In recent literature, several authors have challenged the validity of the exponential-decay law, based on observed variations in radioactive decay rate measurements beyond statistical accuracy. Tentative explanations have been sought in external interferences influencing the decay process, such as interactions of the nuclei with solar and cosmic neutrinos. Given the important implications of such statements on theoretical and practical level, one would expect that they are backed up with radionuclide metrology of the highest quality. In reality, they share the common traits of using poor metrology and incomplete uncertainty analysis with respect to the stability of the measurement technique. In this paper, new claims of correlations between decay rates and space weather are questioned.

Published
2020

38. First Search for Bosonic Superweakly Interacting Massive Particles with Masses up to <math><mrow><mn>1</mn><mtext> </mtext><mtext> </mtext><mi>MeV</mi><mo>/</mo><msup><mrow><mi>c</mi></mrow><mrow><mn>2</mn></mrow></msup></mrow></math> with GERDA

Author

M, Agostini, A M, Bakalyarov, M, Balata, I, Barabanov, L, Baudis, C, Bauer, E, Bellotti, S, Belogurov, A, Bettini, L, Bezrukov, D, Borowicz, E, Bossio, V, Bothe, V, Brudanin, R, Brugnera, A, Caldwell, C, Cattadori, A, Chernogorov, T, Comellato, V, D'Andrea, E V, Demidova, N, Di Marco, E, Doroshkevich, V, Egorov, F, Fischer, M, Fomina, A, Gangapshev, A, Garfagnini, C, Gooch, P, Grabmayr, V, Gurentsov, K, Gusev, J, Hakenmüller, S, Hemmer, R, Hiller, W, Hofmann, M, Hult, L V, Inzhechik, J, Janicskó Csáthy, J, Jochum, M, Junker, V, Kazalov, Y, Kermaïdic, H, Khushbakht, T, Kihm, I V, Kirpichnikov, A, Klimenko, R, Kneißl, K T, Knöpfle, O, Kochetov, V N, Kornoukhov, P, Krause, V V, Kuzminov, M, Laubenstein, A, Lazzaro, M, Lindner, I, Lippi, A, Lubashevskiy, B, Lubsandorzhiev, G, Lutter, C, Macolino, B, Majorovits, W, Maneschg, M, Miloradovic, R, Mingazheva, M, Misiaszek, P, Moseev, I, Nemchenok, K, Panas, L, Pandola, K, Pelczar, L, Pertoldi, P, Piseri, A, Pullia, C, Ransom, L, Rauscher, S, Riboldi, N, Rumyantseva, C, Sada, F, Salamida, S, Schönert, J, Schreiner, M, Schütt, A-K, Schütz, O, Schulz, M, Schwarz, B, Schwingenheuer, O, Selivanenko, E, Shevchik, M, Shirchenko, H, Simgen, A, Smolnikov, D, Stukov, A A, Vasenko, A, Veresnikova, C, Vignoli, K, von Sturm, T, Wester, C, Wiesinger, M, Wojcik, E, Yanovich, B, Zatschler, I, Zhitnikov, S V, Zhukov, D, Zinatulina, A, Zschocke, A J, Zsigmond, K, Zuber, and G, Zuzel

Abstract

We present the first search for bosonic superweakly interacting massive particles (super-WIMPs) as keV-scale dark matter candidates performed with the GERDA experiment. GERDA is a neutrinoless double-β decay experiment which operates high-purity germanium detectors enriched in Ge76 in an ultralow background environment at the Laboratori Nazionali del Gran Sasso (LNGS) of INFN in Italy. Searches were performed for pseudoscalar and vector particles in the mass region from 60 keV/c2 to 1 MeV/c2. No evidence for a dark matter signal was observed, and the most stringent constraints on the couplings of super-WIMPs with masses above 120 keV/c2 have been set. As an example, at a mass of 150 keV/c2 the most stringent direct limits on the dimensionless couplings of axionlike particles and dark photons to electrons of gae<3×10−12 and α′/α<6.5×10−24 at 90% credible interval, respectively, were obtained.

Published
2020

39. First Search for Bosonic Superweakly Interacting Massive Particles with Masses up to 1 MeV/c2 with GERDA

Author

K. Panas, M. M. Wojcik, V. N. Kornoukhov, K. Pelczar, A.-K. Schütz, E. Bellotti, L. B. Bezrukov, E. Shevchik, N. Di Marco, Alessandro Bettini, Manfred Lindner, W. Maneschg, Guillaume Lutter, A. M. Bakalyarov, E. A. Yanovich, T. Wester, A.A. Smolnikov, O.I. Kochetov, Laura Baudis, C. Cattadori, Anna Julia Zsigmond, V. G. Egorov, Kai Zuber, R. Brugnera, O. Selivanenko, R. Mingazheva, Th. Kihm, M. Balata, A. A. Vasenko, V. V. Kuzminov, Matteo Agostini, L. Rauscher, B. Schwingenheuer, M. Junker, Werner Hofmann, V. I. Gurentsov, A. Zschocke, V. Bothe, Paolo Piseri, Allen Caldwell, A. M. Gangapshev, E. Doroshkevich, I. V. Kirpichnikov, H. Khushbakht, P. Moseev, Jochen Schreiner, P. Grabmayr, Luciano Pandola, Bayarto Lubsandorzhiev, L. V. Inzhechik, C. Vignoli, A. Lazzaro, M. Miloradovic, K. von Sturm, A. A. Klimenko, L. Pertoldi, M. Schwarz, A. Garfagnini, O. Schulz, A. Pullia, K. N. Gusev, A. Lubashevskiy, N. Rumyantseva, K. T. Knöpfle, C. Macolino, Cinzia Sada, V.B. Brudanin, C. Ransom, Hardy Simgen, B. Zatschler, I. R. Barabanov, C. Gooch, R. Kneißl, S. V. Zhukov, Josef Jochum, S. Schönert, V. V. Kazalov, Franz Dieter Fischer, T. Comellato, M. Laubenstein, A. V. Veresnikova, A. Chernogorov, R. Hiller, G. Zuzel, P. Krause, Y. Kermaïdic, Ivano Lippi, J. Hakenmüller, C. Wiesinger, M. Shirchenko, V. D'Andrea, M. Fomina, D. Stukov, E. Bossio, F. Salamida, C. Bauer, Stefano Riboldi, M. Misiaszek, M. Schütt, D. Borowicz, J. Janicskó Csáthy, I. Zhitnikov, Igor Nemchenok, Bela Majorovits, E. V. Demidova, S. Belogurov, D. R. Zinatulina, Mikael Hult, and S. Hemmer

Subjects
Physics, Particle physics, 2019-20 coronavirus outbreak, Photon, Coronavirus disease 2019 (COVID-19), Physics::Instrumentation and Detectors, Dark matter, General Physics and Astronomy, chemistry.chemical_element, Germanium, Electron, 7. Clean energy, 01 natural sciences, Pseudoscalar, chemistry, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Dimensionless quantity
Abstract

We present the first search for bosonic superweakly interacting massive particles (super-WIMPs) as keV-scale dark matter candidates performed with the GERDA experiment. GERDA is a neutrinoless double-s decay experiment which operates high-purity germanium detectors enriched in ^{76}Ge in an ultralow background environment at the Laboratori Nazionali del Gran Sasso (LNGS) of INFN in Italy. Searches were performed for pseudoscalar and vector particles in the mass region from 60 keV/c^{2} to 1 MeV/c^{2}. No evidence for a dark matter signal was observed, and the most stringent constraints on the couplings of super-WIMPs with masses above 120 keV/c^{2} have been set. As an example, at a mass of 150 keV/c^{2} the most stringent direct limits on the dimensionless couplings of axionlike particles and dark photons to electrons of g_{ae}

Published
2020

40. Effective field theory interactions for liquid argon target in DarkSide-50 experiment

Author

M. D. Skorokhvatov, R. Milincic, E. Segreto, Min-Xin Guan, A. Grobov, D. Hughes, A. Monte, Stefano Cavuoti, A. L. Renshaw, Z. Ye, A. S. Kubankin, B. Schlitzer, A. Navrer Agasson, A. M. Goretti, S. Pordes, P. Trinchese, R. Tartaglia, A. Caminata, A. Sheshukov, D. Sablone, C. J. Martoff, G. Bonfini, An. Ianni, M. Cariello, F. Gabriele, B. R. Hackett, M. La Commara, G. Koh, K. J. Keeter, Frank Calaprice, X. Xiang, C. Savarese, B. Bottino, Hui Wang, P. Cavalcante, Monica Verducci, Nicomede Pelliccia, G. K. Giovanetti, L. Mapelli, M. Wada, E. Picciau, Ivone F. M. Albuquerque, I. N. Machulin, A. Tonazzo, A. de Candia, E. Pantic, T. N. Johnson, Y. Guardincerri, Thomas Alexander, N. Canci, R. B. Vogelaar, M. Carpinelli, S. De Cecco, S. Davini, Marco Pallavicini, Mariano Cadoni, A. Razeto, C. Ghiano, D. D'Angelo, A. O. Nozdrina, G. Batignani, M. Orsini, N. Rossi, D. D'Urso, Denis Korablev, Paolo Musico, Stefano Giagu, Al. Ianni, D. Franco, M. Ave, S. Sanfilippo, E. Edkins, Caoxiang Zhu, M. Lai, Giuseppe Longo, A. Oleinik, Vittorio Cataudella, S. Bussino, M. Rescigno, M. Lissia, W. Bonivento, H. O. Back, O. Samoylov, Anton Empl, M. M. Wojcik, E. Paoloni, M. Cadeddu, J. Maricic, V. N. Muratova, A. Devoto, M. Caravati, A. A. Machado, G. De Filippis, M. Carlini, A. Pocar, F. Granato, Peter Daniel Meyers, K. Biery, Yanchu Wang, M. De Deo, P. N. Singh, S. Catalanotti, M. Gromov, S. S. Poudel, Q. Riffard, Y. Suvorov, O. Gorchakov, V. Bocci, Xiang Xiao, A. G. Cocco, S. Westerdale, C. Galbiati, L. Pagani, K. Fomenko, O. Smirnov, G. Di Pietro, C. Stanford, G. Zuzel, C. Cicalo, S. M. Mari, G. Fiorillo, A. S. Chepurnov, A. V. Shchagin, A. Candela, C. Dionisi, T. J. Waldrop, F. Di Eusanio, Fausto Ortica, C. L. Kendziora, E. V. Unzhakov, Aldo Romani, M. D'Incecco, Francesco Ragusa, B. Hosseini, I. Kochanek, P. Agnes, H. Qian, Paul H. Humble, M. Gulino, Chung-Yao Yang, Andrea Messina, A. V. Derbin, G. Testera, W. Sands, G. De Rosa, B. Rossi, Xiujiang Li, Giovanni Covone, Alan Watson, A. Mandarano, K. Pelczar, A. K. Alton, Matteo Morrocchi, K. Herner, M. Kuss, Luciano Pandola, E. V. Hungerford, A. Sotnikov, D. A. Semenov, S. Stracka, G. Korga, Valerio Ippolito, A. Vishneva, M. Razeti, C. Giganti, M. Downing, 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), 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), DarkSide-50, 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), Agnes, P, Albuquerque, I, Alexander, T, Alton, A, Ave, M, Back, H, Batignani, G, Biery, K, Bocci, V, Bonfini, G, Bonivento, W, Bottino, B, Bussino, S, Cadeddu, M, 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, Cocco, A, Covone, G, D'Angelo, D, Davini, S, De Candia, A, De Cecco, S, De Deo, M, De Filippis, G, De Rosa, G, Derbin, A, Devoto, A, Di Eusanio, F, D'Incecco, M, Di Pietro, G, Dionisi, C, Downing, M, D'Urso, D, Edkins, E, Empl, A, Fiorillo, G, Fomenko, K, Franco, D, Gabriele, F, Galbiati, C, Ghiano, C, Giagu, S, Giganti, C, Giovanetti, G, Gorchakov, O, Goretti, A, Granato, F, Grobov, A, Gromov, M, Guan, M, Guardincerri, Y, Gulino, M, Hackett, B, Herner, K, Hosseini, B, Hughes, D, Humble, P, Hungerford, E, Ianni, A, Ippolito, V, Johnson, T, Keeter, K, Kendziora, C, Kochanek, I, Koh, G, Korablev, D, Korga, G, Kubankin, A, Kuss, M, La Commara, M, Lai, M, Li, X, Lissia, M, Longo, G, Machado, A, Machulin, I, Mandarano, A, Mapelli, L, Mari, S, Maricic, J, Martoff, C, Messina, A, Meyers, P, Milincic, R, Monte, A, Morrocchi, M, Muratova, V, Musico, P, Agasson, A, Nozdrina, A, Oleinik, A, Orsini, M, Ortica, F, Pagani, L, Pallavicini, M, Pandola, L, Pantic, E, Paoloni, E, Pelczar, K, Pelliccia, N, Picciau, E, Pocar, A, Pordes, S, Poudel, S, Qian, H, Ragusa, F, Razeti, M, Razeto, A, Renshaw, A, Rescigno, M, Riffard, Q, Romani, A, Rossi, B, Rossi, N, Sablone, D, Samoylov, O, Sands, W, Sanfilippo, S, Savarese, C, Schlitzer, B, Segreto, E, Semenov, D, Shchagin, A, Sheshukov, A, Singh, P, Skorokhvatov, M, Smirnov, O, Sotnikov, A, Stanford, C, Stracka, S, Suvorov, Y, Tartaglia, R, Testera, G, Tonazzo, A, Trinchese, P, Unzhakov, E, Verducci, M, Vishneva, A, Vogelaar, R, Wada, M, Waldrop, T, Wang, H, Wang, Y, Watson, A, Westerdale, S, Wojcik, M, Xiang, X, Xiao, X, Yang, C, Ye, Z, Zhu, C, Zuzel, G, Agnes, P., Albuquerque, I. F. M., Alexander, T., Alton, A. K., Ave, M., Back, H. O., Batignani, G., Biery, K., Bocci, V., Bonfini, G., Bonivento, W. M., Bottino, B., Bussino, S., Cadeddu, M., 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., Cicalò, C., Cocco, A. G., Covone, G., D’Angelo, D., Davini, S., De Candia, A., De Cecco, S., De Deo, M., De Filippis, G., De Rosa, G., Derbin, A. V., Devoto, A., Di Eusanio, F., D’Incecco, M., Di Pietro, G., Dionisi, C., Downing, M., D’Urso, D., Edkins, E., Empl, A., Fiorillo, G., Fomenko, K., Franco, D., Gabriele, F., Galbiati, C., Ghiano, C., Giagu, S., Giganti, C., Giovanetti, G. K., Gorchakov, O., Goretti, A. M., Granato, F., Grobov, A., Gromov, M., Guan, M., Guardincerri, Y., Gulino, M., Hackett, B. R., Herner, K., Hosseini, B., Hughes, D., Humble, P., Hungerford, E. V., Ianni, Al., Ianni, An., Ippolito, V., Johnson, T. N., Keeter, K., Kendziora, C. L., Kochanek, I., Koh, G., Korablev, D., Korga, G., Kubankin, A., Kuss, M., La Commara, M., Lai, M., Li, X., Lissia, M., Longo, G., Machado, A. A., Machulin, I. N., Mandarano, A., Mapelli, L., Mari, S. M., Maricic, J., Martoff, C. J., Messina, A., Meyers, P. D., Milincic, R., Monte, A., Morrocchi, M., Muratova, V. N., Musico, P., Navrer Agasson, A., Nozdrina, A. O., Oleinik, A., Orsini, M., 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., Qian, H., Ragusa, F., Razeti, M., Razeto, A., Renshaw, A. L., Rescigno, M., Riffard, Q., Romani, A., Rossi, B., Rossi, N., Sablone, D., Samoylov, O., Sands, W., Sanfilippo, S., Savarese, C., 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., Suvorov, Y., Tartaglia, R., Testera, G., Tonazzo, A., Trinchese, P., Unzhakov, E. V., Verducci, M., Vishneva, A., Vogelaar, R. B., Wada, M., Waldrop, T. J., Wang, H., Wang, Y., Watson, A. W., Westerdale, S., Wojcik, M. M., Xiang, X., Xiao, X., Yang, C., Ye, Z., Zhu, C., Zuzel, G., Cicalo, C., D'Angelo, D., Derbin, A., V, D'Incecco, M., D'Urso, D., Hungerford, E., Ianni, Al, Ianni, An, Agasson, A. Navrer, Unzhakov, E., 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), 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
WIMP: dark matterWIMP, Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, chemistry.chemical_element, FOS: Physical sciences, WIMP: mass, Cosmic ray, coupling constant: upper limit, DarkSide, spin: dependence, liquid argon: target, 01 natural sciences, 7. Clean energy, channel cross section: upper limit, WIMP: dark matter, Cosmology, High Energy Physics - Experiment, Nuclear physics, nonrelativistic, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), effective field theory, cosmic rays, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, 0103 physical sciences, Effective field theory, DARK-MATTER, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Experiments in gravity, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 010306 general physics, [PHYS]Physics [physics], Coupling, Physics, Argon, 010308 nuclear & particles physics, argon: nucleus, WIMP nucleon: cross section, Instrumentation and Detectors (physics.ins-det), Automatic Keywords, High Energy Physics - Phenomenology, chemistry, Weakly interacting massive particles, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], Liquid argon, High Energy Physics::Experiment, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], cosmology, experimental results
Abstract

We reanalize data collected with the DarkSide-50 experiment and recently used to set limits on the spin-independent interaction rate of weakly interacting massive particles (WIMPs) on argon nuclei with an effective field theory framework. The dataset corresponds to a total (16660 $\pm$ 270) kg d exposure using a target of low-radioactivity argon extracted from underground sources. We obtain upper limits on the effective couplings of the 12 leading operators in the nonrelativistic systematic expansion. For each effective coupling we set constraints on WIMP-nucleon cross sections, setting upper limits between $2.4 \times 10^{-45} \, \mathrm{cm}^2$ and $2.3 \times 10^{-42} \, \mathrm{cm}^2$ (8.9 $\times 10^{-45} \, \mathrm{cm}^2$ and 6.0 $\times 10^{-42} \, \mathrm{cm}^2$) for WIMPs of mass of 100 $\mathrm{GeV/c^2}$ (1000 $\mathrm{GeV/c^2}$) at 90\% confidence level., Accepted by PRD

Published
2020

41. Design and construction of a new detector to measure ultra-low radioactive-isotope contamination of argon

Author

C.E. Aalseth, S. Abdelhakim, F. Acerbi, P. Agnes, R. Ajaj, I.F.M. Albuquerque, T. Alexander, A. Alici, A.K. Alton, P. Amaudruz, F. Ameli, J. Anstey, P. Antonioli, M. Arba, S. Arcelli, R. Ardito, I.J. Arnquist, P. Arpaia, D.M. Asner, A. Asunskis, M. Ave, H.O. Back, V. Barbaryan, A. Barrado Olmedo, G. Batignani, M.G. Bisogni, V. Bocci, A. Bondar, G. Bonfini, W. Bonivento, E. Borisova, B. Bottino, M.G. Boulay, R. Bunker, S. Bussino, A. Buzulutskov, M. Cadeddu, M. Cadoni, A. Caminata, N. Canci, A. Candela, C. Cantini, M. Caravati, M. Cariello, F. Carnesecchi, M. Carpinelli, A. Castellani, P. Castello, S. Catalanotti, V. Cataudella, P. Cavalcante, D. Cavazza, S. Cavuoti, S. Cebrian, J.M. Cela Ruiz, B. Celano, R. Cereseto, W. Cheng, A. Chepurnov, C. Cicalò, L. Cifarelli, M. Citterio, F. Coccetti, A.G. Cocco, V. Cocco, M. Colocci, L. Consiglio, F. Cossio, G. Covone, P. Crivelli, I. D'Antone, M. D'Incecco, D. D'Urso, M.D. Da Rocha Rolo, O. Dadoun, M. Daniel, S. Davini, A. De Candia, S. De Cecco, M. De Deo, A. De Falco, G. De Filippis, D. De Gruttola, G. De Guido, G. De Rosa, G. Dellacasa, P. Demontis, S. DePaquale, A.V. Derbin, A. Devoto, F. Di Eusanio, L. Di Noto, G. Di Pietro, P. Di Stefano, C. Dionisi, G. Dolganov, F. Dordei, M. Downing, F. Edalatfar, A. Empl, M. Fernandez Diaz, A. Ferri, C. Filip, G. Fiorillo, K. Fomenko, A. Franceschi, D. Franco, G.E. Froudakis, F. Gabriele, A. Gabrieli, C. Galbiati, M. Garbini, P. Garcia Abia, D. Gascón Fora, A. Gendotti, C. Ghiano, A. Ghisi, S. Giagu, P. Giampa, R.A. Giampaolo, C. Giganti, M.A. Giorgi, G.K. Giovanetti, M.L. Gligan, A. Gola, O. Gorchakov, M. Grab, R. Graciani Diaz, F. Granato, M. Grassi, J.W. Grate, G.Y. Grigoriev, A. Grobov, M. Gromov, M. Guan, M.B.B. Guerra, M. Guerzoni, M. Gulino, R.K. Haaland, B.R. Hackett, A. Hallin, B. Harrop, E.W. Hoppe, S. Horikawa, B. Hosseini, F. Hubaut, P. Humble, E.V. Hungerford, An. Ianni, A. Ilyasov, V. Ippolito, C. Jillings, K. Keeter, C.L. Kendziora, S. Kim, I. Kochanek, K. Kondo, G. Kopp, D. Korablev, G. Korga, A. Kubankin, R. Kugathasan, M. Kuss, M. Kuźniak, M. La Commara, L. La Delfa, M. Lai, S. Langrock, M. Lebois, B. Lehnert, N. Levashko, X. Li, Q. Liqiang, M. Lissia, G.U. Lodi, G. Longo, R. López Manzano, R. Lussana, L. Luzzi, A.A. Machado, I.N. Machulin, A. Mandarano, L. Mapelli, M. Marcante, A. Margotti, S.M. Mari, M. Mariani, J. Maricic, M. Marinelli, D. Marras, M. Martínez, J.J. Martínez Morales, A.D. Martinez Rojas, C.J. Martoff, M. Mascia, J. Mason, A. Masoni, A. Mazzi, A.B. McDonald, A. Messina, P.D. Meyers, T. Miletic, R. Milincic, A. Moggi, S. Moioli, J. Monroe, M. Morrocchi, T. Mroz, W. Mu, V.N. Muratova, S. Murphy, C. Muscas, P. Musico, R. Nania, T. Napolitano, A. Navrer Agasson, M. Nessi, I. Nikulin, A. Oleinik, V. Oleynikov, M. Orsini, F. Ortica, L. Pagani, M. Pallavicini, S. Palmas, L. Pandola, E. Pantic, E. Paoloni, G. Paternoster, F. Pazzona, S. Peeters, P.A. Pegoraro, K. Pelczar, L.A. Pellegrini, C. Pellegrino, N. Pelliccia, F. Perotti, V. Pesudo, E. Picciau, C. Piemonte, F. Pietropaolo, A. Pocar, T.R. Pollmann, D. Portaluppi, S.S. Poudel, P. Pralavorio, D. Price, B. Radics, F. Raffaelli, F. Ragusa, M. Razeti, A. Razeto, V. Regazzoni, C. Regenfus, A.L. Renshaw, S. Rescia, M. Rescigno, F. Retiere, L.P. Rignanese, A. Rivetti, A. Romani, L. Romero, N. Rossi, A. Rubbia, D. Sablone, P. Sala, P. Salatino, O. Samoylov, E. Sánchez García, S. Sanfilippo, M. Sant, D. Santone, R. Santorelli, C. Savarese, E. Scapparone, B. Schlitzer, G. Scioli, E. Segreto, A. Seifert, D.A. Semenov, A. Shchagin, A. Sheshukov, S. Siddhanta, M. Simeone, P.N. Singh, P. Skensved, M.D. Skorokhvatov, O. Smirnov, G. Sobrero, A. Sokolov, A. Sotnikov, R. Stainforth, A. Steri, S. Stracka, V. Strickland, G.B. Suffritti, S. Sulis, Y. Suvorov, A.M. Szelc, R. Tartaglia, G. Testera, T. Thorpe, A. Tonazzo, A. Tosi, M. Tuveri, E.V. Unzhakov, G. Usai, A. Vacca, E. Vázquez-Jáuregui, M. Verducci, T. Viant, S. Viel, F. Villa, A. Vishneva, R.B. Vogelaar, M. Wada, J. Wahl, J.J. Walding, H. Wang, Y. Wang, S. Westerdale, R.J. Wheadon, R. Williams, J. Wilson, Marcin Wojcik, Mariusz Wojcik, S. Wu, X. Xiao, C. Yang, Z. Ye, M. Zuffa, G. Zuzel, 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), Fondazione Bruno Kessler [Trento, Italy] (FBK), Trento Institute for Fundamental Physics and Applications, Italy, 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 Fédératif de Recherche en Sciences et Ingénierie de la Santé (IFRESIS-ENSMSE), École des Mines de Saint-Étienne (Mines Saint-Étienne MSE), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-IFR143, University of Surrey (UNIS), Aalseth, C, Abdelhakim, S, Acerbi, F, Agnes, P, Ajaj, R, Albuquerque, I, Alexander, T, Alici, A, Alton, A, Amaudruz, P, Ameli, F, Anstey, J, Antonioli, P, Arba, M, Arcelli, S, Ardito, R, Arnquist, I, Arpaia, P, Asner, D, Asunskis, A, Ave, M, Back, H, Barbaryan, V, Barrado Olmedo, A, Batignani, G, Bisogni, M, Bocci, V, Bondar, A, Bonfini, G, Bonivento, W, Borisova, E, Bottino, B, Boulay, M, Bunker, R, Bussino, S, Buzulutskov, A, Cadeddu, M, Cadoni, M, Caminata, A, Canci, N, Candela, A, Cantini, C, Caravati, M, Cariello, M, Carnesecchi, F, Carpinelli, M, Castellani, A, Castello, P, Catalanotti, S, Cataudella, V, Cavalcante, P, Cavazza, D, Cavuoti, S, Cebrian, S, Cela Ruiz, J, Celano, B, Cereseto, R, Cheng, W, Chepurnov, A, Cicalo, C, Cifarelli, L, Citterio, M, Coccetti, F, Cocco, A, Cocco, V, Colocci, M, Consiglio, L, Cossio, F, Covone, G, Crivelli, P, D'Antone, I, D'Incecco, M, D'Urso, D, da Rocha Rolo, M, Dadoun, O, Daniel, M, Davini, S, de Candia, A, de Cecco, S, de Deo, M, de Falco, A, de Filippis, G, de Gruttola, D, de Guido, G, de Rosa, G, Dellacasa, G, Demontis, P, Depaquale, S, Derbin, A, Devoto, A, Di Eusanio, F, Di Noto, L, Di Pietro, G, Di Stefano, P, Dionisi, C, Dolganov, G, Dordei, F, Downing, M, Edalatfar, F, Empl, A, Fernandez Diaz, M, Ferri, A, Filip, C, Fiorillo, G, Fomenko, K, Franceschi, A, Franco, D, Froudakis, G, Gabriele, F, Gabrieli, A, Galbiati, C, Garbini, M, Garcia Abia, P, Gascon Fora, D, Gendotti, A, Ghiano, C, Ghisi, A, Giagu, S, Giampa, P, Giampaolo, R, Giganti, C, Giorgi, M, Giovanetti, G, Gligan, M, Gola, A, Gorchakov, O, Grab, M, Graciani Diaz, R, Granato, F, Grassi, M, Grate, J, Grigoriev, G, Grobov, A, Gromov, M, Guan, M, Guerra, M, Guerzoni, M, Gulino, M, Haaland, R, Hackett, B, Hallin, A, Harrop, B, Hoppe, E, Horikawa, S, Hosseini, B, Hubaut, F, Humble, P, Hungerford, E, Ianni, A, Ilyasov, A, Ippolito, V, Jillings, C, Keeter, K, Kendziora, C, Kim, S, Kochanek, I, Kondo, K, Kopp, G, Korablev, D, Korga, G, Kubankin, A, Kugathasan, R, Kuss, M, Kuzniak, M, la Commara, M, la Delfa, L, Lai, M, Langrock, S, Lebois, M, Lehnert, B, Levashko, N, Li, X, Liqiang, Q, Lissia, M, Lodi, G, Longo, G, Lopez Manzano, R, Lussana, R, Luzzi, L, Machado, A, Machulin, I, Mandarano, A, Mapelli, L, Marcante, M, Margotti, A, Mari, S, Mariani, M, Maricic, J, Marinelli, M, Marras, D, Martinez, M, Martinez Morales, J, Martinez Rojas, A, Martoff, C, Mascia, M, Mason, J, Masoni, A, Mazzi, A, Mcdonald, A, Messina, A, Meyers, P, Miletic, T, Milincic, R, Moggi, A, Moioli, S, Monroe, J, Morrocchi, M, Mroz, T, Mu, W, Muratova, V, Murphy, S, Muscas, C, Musico, P, Nania, R, Napolitano, T, Navrer Agasson, A, Nessi, M, Nikulin, I, Oleinik, A, Oleynikov, V, Orsini, M, Ortica, F, Pagani, L, Pallavicini, M, Palmas, S, Pandola, L, Pantic, E, Paoloni, E, Paternoster, G, Pazzona, F, Peeters, S, Pegoraro, P, Pelczar, K, Pellegrini, L, Pellegrino, C, Pelliccia, N, Perotti, F, Pesudo, V, Picciau, E, Piemonte, C, Pietropaolo, F, Pocar, A, Pollmann, T, Portaluppi, D, Poudel, S, Pralavorio, P, Price, D, Radics, B, Raffaelli, F, Ragusa, F, Razeti, M, Razeto, A, Regazzoni, V, Regenfus, C, Renshaw, A, Rescia, S, Rescigno, M, Retiere, F, Rignanese, L, Rivetti, A, Romani, A, Romero, L, Rossi, N, Rubbia, A, Sablone, D, Sala, P, Salatino, P, Samoylov, O, Sanchez Garcia, E, Sanfilippo, S, Sant, M, Santone, D, Santorelli, R, Savarese, C, Scapparone, E, Schlitzer, B, Scioli, G, Segreto, E, Seifert, A, Semenov, D, Shchagin, A, Sheshukov, A, Siddhanta, S, Simeone, M, Singh, P, Skensved, P, Skorokhvatov, M, Smirnov, O, Sobrero, G, Sokolov, A, Sotnikov, A, Stainforth, R, Steri, A, Stracka, S, Strickland, V, Suffritti, G, Sulis, S, Suvorov, Y, Szelc, A, Tartaglia, R, Testera, G, Thorpe, T, Tonazzo, A, Tosi, A, Tuveri, M, Unzhakov, E, Usai, G, Vacca, A, Vazquez-Jauregui, E, Verducci, M, Viant, T, Viel, S, Villa, F, Vishneva, A, Vogelaar, R, Wada, M, Wahl, J, Walding, J, Wang, H, Wang, Y, Westerdale, S, Wheadon, R, Williams, R, Wilson, J, Wojcik, M, Wu, S, Xiao, X, Yang, C, Ye, Z, Zuffa, M, Zuzel, G, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Institut Fédératif de Recherche en Sciences et Ingénierie de la Santé (IFRESIS), Université Jean Monnet - Saint-Étienne (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Ecole Nationale Supérieure des Mines de St Etienne (ENSM ST-ETIENNE)-Centre National de la Recherche Scientifique (CNRS), Aalseth, C. E., Abdelhakim, S., Acerbi, F., Agnes, P., Ajaj, R., Albuquerque, I. F. M., Alexander, T., Alici, A., Alton, A. K., Amaudruz, P., Ameli, F., Anstey, J., Antonioli, P., Arba, M., Arcelli, S., Ardito, R., Arnquist, I. J., Arpaia, P., Asner, D. M., Asunskis, A., Ave, M., Back, H. O., Barbaryan, V., Olmedo, A. Barrado, Batignani, G., Bisogni, M. G., Bocci, V., Bondar, A., Bonfini, G., Bonivento, W., Borisova, E., Bottino, B., Boulay, M. G., Bunker, R., Bussino, S., Buzulutskov, A., Cadeddu, M., Cadoni, M., Caminata, A., Canci, N., Candela, A., Cantini, C., Caravati, M., Cariello, M., Carnesecchi, F., Carpinelli, M., Castellani, A., Castello, P., Catalanotti, S., Cataudella, V., Cavalcante, P., Cavazza, D., Cavuoti, S., Cebrian, S., Ruiz, J. M. Cela, Celano, B., Cereseto, R., Cheng, W., Chepurnov, A., Cicalò, C., Cifarelli, L., Citterio, M., Coccetti, F., Cocco, A. G., Cocco, V., Colocci, M., Consiglio, L., Cossio, F., Covone, G., Crivelli, P., D'Antone, I., D'Incecco, M., D'Urso, D., Rolo, M. D. Da Rocha, Dadoun, O., Daniel, M., Davini, S., Candia, A. De, Cecco, S. De, Deo, M. De, Falco, A. De, Filippis, G. De, Gruttola, D. De, Guido, G. De, Rosa, G. De, Dellacasa, G., Demontis, P., Depaquale, S., Derbin, A. V., Devoto, A., Eusanio, F. Di, Noto, L. Di, Pietro, G. Di, Stefano, P. Di, Dionisi, C., Dolganov, G., Dordei, F., Downing, M., Edalatfar, F., Empl, A., Diaz, M. Fernandez, Ferri, A., Filip, C., Fiorillo, G., Fomenko, K., Franceschi, A., Franco, D., Froudakis, G. E., Gabriele, F., Gabrieli, A., Galbiati, C., Garbini, M., Abia, P. Garcia, Fora, D. Gascón, Gendotti, A., Ghiano, C., Ghisi, A., Giagu, S., Giampa, P., Giampaolo, R. A., Giganti, C., Giorgi, M. A., Giovanetti, G. K., Gligan, M. L., Gola, A., Gorchakov, O., Grab, M., Diaz, R. Graciani, Granato, F., Grassi, M., Grate, J. W., Grigoriev, G. Y., Grobov, A., Gromov, M., Guan, M., Guerra, M. B. B., Guerzoni, M., Gulino, M., Haaland, R. K., Hackett, B. R., Hallin, A., Harrop, B., Hoppe, E. W., Horikawa, S., Hosseini, B., Hubaut, F., Humble, P., Hungerford, E. V., Ianni, An., Ilyasov, A., Ippolito, V., Jillings, C., Keeter, K., Kendziora, C. L., Kim, S., Kochanek, I., Kondo, K., Kopp, G., Korablev, D., Korga, G., Kubankin, A., Kugathasan, R., Kuss, M., Kuźniak, M., Commara, M. La, Delfa, L. La, Lai, M., Langrock, S., Lebois, M., Lehnert, B., Levashko, N., Li, X., Liqiang, Q., Lissia, M., Lodi, G. U., Longo, G., Manzano, R. López, Lussana, R., Luzzi, L., Machado, A. A., Machulin, I. N., Mandarano, A., Mapelli, L., Marcante, M., Margotti, A., Mari, S. M., Mariani, M., Maricic, J., Marinelli, M., Marras, D., Martínez, M., Morales, J. J. Martínez, Rojas, A. D. Martinez, Martoff, C. J., Mascia, M., Mason, J., Masoni, A., Mazzi, A., Mcdonald, A. B., Messina, A., Meyers, P. D., Miletic, T., Milincic, R., Moggi, A., Moioli, S., Monroe, J., Morrocchi, M., Mroz, T., Mu, W., Muratova, V. N., Murphy, S., Muscas, C., Musico, P., Nania, R., Napolitano, T., Agasson, A. Navrer, Nessi, M., Nikulin, I., Oleinik, A., Oleynikov, V., Orsini, M., Ortica, F., Pagani, L., Pallavicini, M., Palmas, S., Pandola, L., Pantic, E., Paoloni, E., Paternoster, G., Pazzona, F., Peeters, S., Pegoraro, P. A., Pelczar, K., Pellegrini, L. A., Pellegrino, C., Pelliccia, N., Perotti, F., Pesudo, V., Picciau, E., Piemonte, C., Pietropaolo, F., Pocar, A., Pollmann, T. R., Portaluppi, D., Poudel, S. S., Pralavorio, P., Price, D., Radics, B., Raffaelli, F., Ragusa, F., Razeti, M., Razeto, A., Regazzoni, V., Regenfus, C., Renshaw, A. L., Rescia, S., Rescigno, M., Retiere, F., Rignanese, L. P., Rivetti, A., Romani, A., Romero, L., Rossi, N., Rubbia, A., Sablone, D., Sala, P., Salatino, P., Samoylov, O., García, E. Sánchez, Sanfilippo, S., Sant, M., Santone, D., Santorelli, R., Savarese, C., Scapparone, E., Schlitzer, B., Scioli, G., Segreto, E., Seifert, A., Semenov, D. A., Shchagin, A., Sheshukov, A., Siddhanta, S., Simeone, M., Singh, P. N., Skensved, P., Skorokhvatov, M. D., Smirnov, O., Sobrero, G., Sokolov, A., Sotnikov, A., Stainforth, R., Steri, A., Stracka, S., Strickland, V., Suffritti, G. B., Sulis, S., Suvorov, Y., Szelc, A. M., Tartaglia, R., Testera, G., Thorpe, T., Tonazzo, A., Tosi, A., Tuveri, M., Unzhakov, E. V., Usai, G., Vacca, A., Vázquez-Jáuregui, E., Verducci, M., Viant, T., Viel, S., Villa, F., Vishneva, A., Vogelaar, R. B., Wada, M., Wahl, J., Walding, J. J., Wang, H., Wang, Y., Westerdale, S., Wheadon, R. J., Williams, R., Wilson, J., Wojcik, Marcin, Wojcik, Mariusz, Wu, S., Xiao, X., Yang, C., Ye, Z., Zuffa, M., Zuzel, G., Aalseth C.E., Abdelhakim S., Acerbi F., Agnes P., Ajaj R., Albuquerque I.F.M., Alexander T., Alici A., Alton A.K., Amaudruz P., Ameli F., Anstey J., Antonioli P., Arba M., Arcelli S., Ardito R., Arnquist I.J., Arpaia P., Asner D.M., Asunskis A., Ave M., Back H.O., Barbaryan V., Barrado Olmedo A., Batignani G., Bisogni M.G., Bocci V., Bondar A., Bonfini G., Bonivento W., Borisova E., Bottino B., Boulay M.G., Bunker R., Bussino S., Buzulutskov A., Cadeddu M., Cadoni M., Caminata A., Canci N., Candela A., Cantini C., Caravati M., Cariello M., Carnesecchi F., Carpinelli M., Castellani A., Castello P., Catalanotti S., Cataudella V., Cavalcante P., Cavazza D., Cavuoti S., Cebrian S., Cela Ruiz J.M., Celano B., Cereseto R., Cheng W., Chepurnov A., Cicalo C., Cifarelli L., Citterio M., Coccetti F., Cocco A.G., Cocco V., Colocci M., Consiglio L., Cossio F., Covone G., Crivelli P., D'Antone I., D'Incecco M., D'Urso D., da Rocha Rolo M.D., Dadoun O., Daniel M., Davini S., de Candia A., de Cecco S., de Deo M., de Falco A., de Filippis G., de Gruttola D., de Guido G., de Rosa G., Dellacasa G., Demontis P., DePaquale S., Derbin A.V., Devoto A., Di Eusanio F., Di Noto L., Di Pietro G., Di Stefano P., Dionisi C., Dolganov G., Dordei F., Downing M., Edalatfar F., Empl A., Fernandez Diaz M., Ferri A., Filip C., Fiorillo G., Fomenko K., Franceschi A., Franco D., Froudakis G.E., Gabriele F., Gabrieli A., Galbiati C., Garbini M., Garcia Abia P., Gascon Fora D., Gendotti A., Ghiano C., Ghisi A., Giagu S., Giampa P., Giampaolo R.A., Giganti C., Giorgi M.A., Giovanetti G.K., Gligan M.L., Gola A., Gorchakov O., Grab M., Graciani Diaz R., Granato F., Grassi M., Grate J.W., Grigoriev G.Y., Grobov A., Gromov M., Guan M., Guerra M.B.B., Guerzoni M., Gulino M., Haaland R.K., Hackett B.R., Hallin A., Harrop B., Hoppe E.W., Horikawa S., Hosseini B., Hubaut F., Humble P., Hungerford E.V., Ianni An., Ilyasov A., Ippolito V., Jillings C., Keeter K., Kendziora C.L., Kim S., Kochanek I., Kondo K., Kopp G., Korablev D., Korga G., Kubankin A., Kugathasan R., Kuss M., Kuzniak M., la Commara M., la Delfa L., Lai M., Langrock S., Lebois M., Lehnert B., Levashko N., Li X., Liqiang Q., Lissia M., Lodi G.U., Longo G., Lopez Manzano R., Lussana R., Luzzi L., Machado A.A., Machulin I.N., Mandarano A., Mapelli L., Marcante M., Margotti A., Mari S.M., Mariani M., Maricic J., Marinelli M., Marras D., Martinez M., Martinez Morales J.J., Martinez Rojas A.D., Martoff C.J., Mascia M., Mason J., Masoni A., Mazzi A., McDonald A.B., Messina A., Meyers P.D., Miletic T., Milincic R., Moggi A., Moioli S., Monroe J., Morrocchi M., Mroz T., Mu W., Muratova V.N., Murphy S., Muscas C., Musico P., Nania R., Napolitano T., Navrer Agasson A., Nessi M., Nikulin I., Oleinik A., Oleynikov V., Orsini M., Ortica F., Pagani L., Pallavicini M., Palmas S., Pandola L., Pantic E., Paoloni E., Paternoster G., Pazzona F., Peeters S., Pegoraro P.A., Pelczar K., Pellegrini L.A., Pellegrino C., Pelliccia N., Perotti F., Pesudo V., Picciau E., Piemonte C., Pietropaolo F., Pocar A., Pollmann T.R., Portaluppi D., Poudel S.S., Pralavorio P., Price D., Radics B., Raffaelli F., Ragusa F., Razeti M., Razeto A., Regazzoni V., Regenfus C., Renshaw A.L., Rescia S., Rescigno M., Retiere F., Rignanese L.P., Rivetti A., Romani A., Romero L., Rossi N., Rubbia A., Sablone D., Sala P., Salatino P., Samoylov O., Sanchez Garcia E., Sanfilippo S., Sant M., Santone D., Santorelli R., Savarese C., Scapparone E., Schlitzer B., Scioli G., Segreto E., Seifert A., Semenov D.A., Shchagin A., Sheshukov A., Siddhanta S., Simeone M., Singh P.N., Skensved P., Skorokhvatov M.D., Smirnov O., Sobrero G., Sokolov A., Sotnikov A., Stainforth R., Steri A., Stracka S., Strickland V., Suffritti G.B., Sulis S., Suvorov Y., Szelc A.M., Tartaglia R., Testera G., Thorpe T., Tonazzo A., Tosi A., Tuveri M., Unzhakov E.V., Usai G., Vacca A., Vazquez-Jauregui E., Verducci M., Viant T., Viel S., Villa F., Vishneva A., Vogelaar R.B., Wada M., Wahl J., Walding J.J., Wang H., Wang Y., Westerdale S., Wheadon R.J., Williams R., Wilson J., Wojcik M., Wu S., Xiao X., Yang C., Ye Z., Zuffa M., Zuzel G., Barrado Olmedo, A., Cela Ruiz, J. M., Da Rocha Rolo, M. D., De Candia, A., De Cecco, S., De Deo, M., De Falco, A., De Filippis, G., De Gruttola, D., De Guido, G., De Rosa, G., Di Eusanio, F., Di Noto, L., Di Pietro, G., Di Stefano, P., Fernandez Diaz, M., Garcia Abia, P., Gascón Fora, D., Graciani Diaz, R., La Commara, M., La Delfa, L., López Manzano, R., Martínez Morales, J. J., Martinez Rojas, A. D., Navrer Agasson, A., Sánchez García, E., and Szelcc, A. M.

Subjects
Physics - Instrumentation and Detectors, gas and liquid scintillators), axions, Physics::Instrumentation and Detectors, Noble liquid detectors (scintillation, ionization, double-phase), 01 natural sciences, 030218 nuclear medicine & medical imaging, Dark Matter detectors (WIMPs, axions, etc.), 0302 clinical medicine, Recoil, Noble liquid detectors (scintillation, ionization, double-phase), Dark Matter detectors (WIMPs, axions, etc.), Cryogenic detectors, Scintillators, scintillation and light emission processes (solid, gas and liquid scintillators), Noble liquid detectors (scintillation, Cryogenic detectors, Scintillation and light emission processes (solid, gas, liquid scintillators), Scintillators, etc.), [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Detectors and Experimental Techniques, physics.ins-det, Instrumentation, Mathematical Physics, Physics, Scintillation and light emission processes (solid, Time projection chamber, Detector, Instrumentation and Detectors (physics.ins-det), double-phase), Dark Matter detectors(WIMPs, axions, etc.), Scintillators, scintillation and light emission processes(solid, gas and liquid scintillators), scintillation and light emission processes(solid, Weakly interacting massive particles, Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics and Astronomy, Dark matter, Cryogenic detector, chemistry.chemical_element, FOS: Physical sciences, Nuclear physics, 03 medical and health sciences, gas, ionization, 0103 physical sciences, liquid scintillators), Instrumentation and Methods for Astrophysics (astro-ph.IM), Dark Matter detectors (WIMPs, Argon, 010308 nuclear & particles physics, Canfranc Underground Laboratory, Scintillator, Dark Matter detectors(WIMPs, chemistry, astro-ph.IM, ArDM
Abstract

Large liquid argon detectors offer one of the best avenues for the detection of galactic weakly interacting massive particles (WIMPs) via their scattering on atomic nuclei. The liquid argon target allows exquisite discrimination between nuclear and electron recoil signals via pulse-shape discrimination of the scintillation signals. Atmospheric argon (AAr), however, has a naturally occurring radioactive isotope, $^{39}$Ar, a $\beta$ emitter of cosmogenic origin. For large detectors, the atmospheric $^{39}$Ar activity poses pile-up concerns. The use of argon extracted from underground wells, deprived of $^{39}$Ar, is key to the physics potential of these experiments. The DarkSide-20k dark matter search experiment will operate a dual-phase time projection chamber with 50 tonnes of radio-pure underground argon (UAr), that was shown to be depleted of $^{39}$Ar with respect to AAr by a factor larger than 1400. Assessing the $^{39}$Ar content of the UAr during extraction is crucial for the success of DarkSide-20k, as well as for future experiments of the Global Argon Dark Matter Collaboration (GADMC). This will be carried out by the DArT in ArDM experiment, a small chamber made with extremely radio-pure materials that will be placed at the centre of the ArDM detector, in the Canfranc Underground Laboratory (LSC) in Spain. The ArDM LAr volume acts as an active veto for background radioactivity, mostly $\gamma$-rays from the ArDM detector materials and the surrounding rock. This article describes the DArT in ArDM project, including the chamber design and construction, and reviews the background required to achieve the expected performance of the detector., Comment: 13 pages, 8 figures. Corresponding author: E. S\'anchez Garc\'ia

Published
2020

42. Measurement of the 145Sm half-life

Author

S. Pommé, I. Kajan, S. Heinitz, and K. Pelczar

Subjects
Systematic error, Radionuclide, Propagation of uncertainty, Radiation, Autocorrelation, Statistics, Half-life, Environmental science, Nuclear data, Uncertainty budget, Hpge detector
Abstract

The half-life of 145Sm has been measured by means of the reference source method with a HPGe detector. The long-lived radionuclide 44Ti was mixed into the source for reference. The time-dependency of the 145Sm/44Ti activity ratio was followed by assessing the count-rate ratio of their characteristic gamma-ray emissions at 61.2 keV (145Sm) and 67.9/78.3 keV (44Ti) in spectra recorded over periods of typically one day. In total, 220 measurements were performed over a period of 384 days or about one half-life period. The experiment and ensuing uncertainty budget are discussed in detail. Different error propagation is applied for random uncertainties, autocorrelated structures in the fit residuals, and potential systematic errors. The result for the 145Sm half-life, 345 (16) d, is compatible with the scarce literature values, however the experimental details of the old measurements were barely documented.

Published
2021

43. Modeling of GERDA Phase II data

Author

A. Domula, M. Schwarz, Laura Baudis, C. Wiesinger, Paolo Piseri, M. Shirchenko, A. Lazzaro, E. Bossio, I. V. Kirpichnikov, Alessandro Bettini, D. R. Zinatulina, M. Miloradovic, E. V. Demidova, A. V. Veresnikova, A. Chernogorov, R. Hiller, R. Kneißl, S. Belogurov, V. D'Andrea, Stefano Riboldi, V.B. Brudanin, C. Ransom, Igor Nemchenok, M. Schütt, M. Misiaszek, Cinzia Sada, B. Zatschler, Bela Majorovits, C. Macolino, Hardy Simgen, W. Maneschg, E. A. Yanovich, P. Moseev, Luciano Pandola, A. A. Klimenko, C. Vignoli, R. Brugnera, Mikael Hult, D. Borowicz, K. N. Gusev, Jochen Schreiner, L. Pertoldi, F. Fischer, Josef Jochum, N. Rumyantseva, V. V. Kuzminov, Matteo Agostini, V. I. Gurentsov, S. Hemmer, Y. Kermaïdic, J. Janicskó Csáthy, Stefan Schönert, E. Doroshkevich, Bayarto Lubsandorzhiev, L. V. Inzhechik, Ivano Lippi, Manfred Lindner, E. Bellotti, T. Wester, A.A. Smolnikov, K. Panas, I. Zhitnikov, V. Bothe, C. Cattadori, Anna Julia Zsigmond, Kai Zuber, A. Zschocke, L. B. Bezrukov, E. Shevchik, A.-K. Schütz, Marcin Wójcik, V. N. Kornoukhov, M. Fomina, P. Grabmayr, K. Pelczar, N. Di Marco, O.I. Kochetov, Guillaume Lutter, A. M. Bakalyarov, I. R. Barabanov, A. M. Gangapshev, C. Gooch, S. V. Zhukov, Thomas Kihm, O. Selivanenko, R. Mingazheva, B. Schwingenheuer, M. Junker, Oliver Schulz, Alberto Pullia, V. G. Egorov, M. Balata, A. Garfagnini, K. T. Knöpfle, T. Comellato, L. Vanhoefer, Matthias Laubenstein, G. Zuzel, V. V. Kazalov, P. Krause, A. A. Vasenko, Christian Bauer, A. Lubashevskiy, J. Hakenmüller, D. Stukov, Werner Hofmann, F. Salamida, Allen Caldwell, and K. von Sturm

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Physics - Instrumentation and Detectors, 010308 nuclear & particles physics, Spectrum (functional analysis), Detector, Phase (waves), FOS: Physical sciences, Order (ring theory), Instrumentation and Detectors (physics.ins-det), 01 natural sciences, Semiconductor detector, ddc, Region of interest, 0103 physical sciences, Dark Matter and Double Beta Decay (experiments), lcsh:QC770-798, lcsh:Nuclear and particle physics. Atomic energy. Radioactivity, DOUBLE-BETA DECAY, Sensitivity (control systems), Nuclear Experiment (nucl-ex), Neutrino, 010306 general physics, Nuclear Experiment
Abstract

The GERmanium Detector Array (Gerda) experiment at the Gran Sasso underground laboratory (LNGS) of INFN is searching for neutrinoless double-beta (0νββ) decay of 76Ge. The technological challenge of Gerda is to operate in a “background-free” regime in the region of interest (ROI) after analysis cuts for the full 100 kg·yr target exposure of the experiment. A careful modeling and decomposition of the full-range energy spectrum is essential to predict the shape and composition of events in the ROI around Qββ for the 0νββ search, to extract a precise measurement of the half-life of the double-beta decay mode with neutrinos (2νββ) and in order to identify the location of residual impurities. The latter will permit future experiments to build strategies in order to further lower the background and achieve even better sensitivities. In this article the background decomposition prior to analysis cuts is presented for Gerda Phase II. The background model fit yields a flat spectrum in the ROI with a background index (BI) of $$ {16.04}_{-0.85}^{+0.78}\cdotp {10}^{-3} $$ 16.04 − 0.85 + 0.78 · 10 − 3 cts/(keV·kg·yr) for the enriched BEGe data set and $$ {14.68}_{-0.52}^{+0.47}\cdotp {10}^{-3} $$ 14.68 − 0.52 + 0.47 · 10 − 3 cts/(keV·kg·yr) for the enriched coaxial data set. These values are similar to the one of Phase I despite a much larger number of detectors and hence radioactive hardware components.

Published
2019

44. Measurement of the ion fraction and mobility of 218Po produced in 222Rn decays in liquid argon

Author

T. J. Waldrop, F. Di Eusanio, A. K. Alton, D. Sablone, E. Picciau, G. Bonfini, Ivone F. M. Albuquerque, R. Tartaglia, A. L. Renshaw, K. J. Keeter, Frank Calaprice, X. Xiang, Anton Empl, I. Kochanek, G. Testera, K. Pelczar, Cristiano Galbiati, Aldo Romani, S. Sanfilippo, M. M. Wojcik, M. Caravati, A. A. Machado, Stefano Cavuoti, S. S. Poudel, A. Caminata, F. Gabriele, Q. Riffard, P. Trinchese, A. Oleinik, Giovanni Covone, O. Gorchakov, P. Cavalcante, O. Smirnov, Luciano Pandola, P. D. Meyers, E. Edkins, M. Carlini, A. de Candia, A. Tonazzo, E. Pantic, Chung-Yao Yang, Andrea Messina, Monica Verducci, A. V. Derbin, An. Ianni, P. N. Singh, B. Bottino, V. N. Muratova, K. Biery, I. N. Machulin, E. V. Unzhakov, M. Downing, P. Agnes, M. Lissia, L. Pagani, A. Navrer Agasson, M. Wada, Al. Ianni, Nicomede Pelliccia, N. Canci, A. O. Nozdrina, Caoxiang Zhu, M. Lai, Giuseppe Longo, K. Fomenko, G. De Filippis, C. Giganti, M. De Deo, M. La Commara, Mariano Cadoni, B. Hosseini, G. De Rosa, Marco Pallavicini, D. D'Angelo, Y. Guardincerri, A. M. Goretti, M. D. Skorokhvatov, B. R. Hackett, M. Rescigno, S. Bussino, M. Cadeddu, C. Dionisi, R. Milincic, N. Rossi, A. Pocar, D. D'Urso, Paul H. Humble, Xiang Xiao, Fausto Ortica, Stefano Maria Mari, G. Batignani, A. Monte, M. Orsini, Stefano Giagu, M. Cariello, Marisa Gulino, M. Ave, Yuting Wang, G. Koh, D. Hughes, J. Maricic, A.V. Shchagin, E. Paoloni, B. Rossi, G. Fiorillo, S. Pordes, Z. Ye, H. O. Back, C. L. Kendziora, A. Candela, C. Ghiano, A. S. Kubankin, A. Devoto, A. Grobov, Alan Watson, A. Mandarano, Hui Wang, Y. Suvorov, S. Westerdale, V. Bocci, M. D'Incecco, O. Samoylov, G. Korga, M. Gromov, Thomas Alexander, H. Qian, A. S. Chepurnov, S. Catalanotti, A. Sheshukov, G. K. Giovanetti, C. Cicalo, C. Savarese, B. Schlitzer, W. Sands, D. Franco, F. Granato, A. G. Cocco, C. Stanford, Denis Korablev, S. Davini, C. J. Martoff, L. Mapelli, W. Bonivento, Paolo Musico, A. Razeto, E. Segreto, E. V. Hungerford, A. Sotnikov, Valerio Ippolito, M. Carpinelli, S. De Cecco, A. Vishneva, G. Zuzel, Francesco Ragusa, M. Razeti, Xiujiang Li, Matteo Morrocchi, K. Herner, M. Kuss, T. N. Johnson, R. B. Vogelaar, Vittorio Cataudella, G. Di Pietro, Min-Xin Guan, D. A. Semenov, S. Stracka, Agnes, P, Albuquerque, I, Alexander, T, Alton, A, Ave, M, Back, H, Batignani, G, Biery, K, Bocci, V, Bonfini, G, Bonivento, W, Bottino, B, Bussino, S, Cadeddu, M, 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, Cocco, A, Covone, G, D'Angelo, D, Davini, S, De Candia, A, De Cecco, S, De Deo, M, De Filippis, G, De Rosa, G, Derbin, A, Devoto, A, Di Eusanio, F, D'Incecco, M, Di Pietro, G, Dionisi, C, Downing, M, D'Urso, D, Edkins, E, Empl, A, Fiorillo, G, Fomenko, K, Franco, D, Gabriele, F, Galbiati, C, Ghiano, C, Giagu, S, Giganti, C, Giovanetti, G, Gorchakov, O, Goretti, A, Granato, F, Grobov, A, Gromov, M, Guan, M, Guardincerri, Y, Gulino, M, Hackett, B, Herner, K, Hosseini, B, Hughes, D, Humble, P, Hungerford, E, Ianni, A, Ippolito, V, Johnson, T, Keeter, K, Kendziora, C, Kochanek, I, Koh, G, Korablev, D, Korga, G, Kubankin, A, Kuss, M, La Commara, M, Lai, M, Li, X, Lissia, M, Longo, G, Machado, A, Machulin, I, Mandarano, A, Mapelli, L, Mari, S, Maricic, J, Martoff, C, Messina, A, Meyers, P, Milincic, R, Monte, A, Morrocchi, M, Muratova, V, Musico, P, Navrer Agasson, A, Nozdrina, A, Oleinik, A, Orsini, M, Ortica, F, Pagani, L, Pallavicini, M, Pandola, L, Pantic, E, Paoloni, E, Pelczar, K, Pelliccia, N, Picciau, E, Pocar, A, Pordes, S, Poudel, S, Qian, H, Ragusa, F, Razeti, M, Razeto, A, Renshaw, A, Rescigno, M, Riffard, Q, Romani, A, Rossi, B, Rossi, N, Sablone, D, Samoylov, O, Sands, W, Sanfilippo, S, Savarese, C, Schlitzer, B, Segreto, E, Semenov, D, Shchagin, A, Sheshukov, A, Singh, P, Skorokhvatov, M, Smirnov, O, Sotnikov, A, Stanford, C, Stracka, S, Suvorov, Y, Tartaglia, R, Testera, G, Tonazzo, A, Trinchese, P, Unzhakov, E, Verducci, M, Vishneva, A, Vogelaar, R, Wada, M, Waldrop, T, Wang, H, Wang, Y, Watson, A, Westerdale, S, Wojcik, M, Xiang, X, Xiao, X, Yang, C, Ye, Z, Zhu, C, Zuzel, G, 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), DARKSIDE, 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), Agnes, P., Albuquerque, I. F. M., Alexander, T., Alton, A. K., Ave, M., Back, H. O., Batignani, G., Biery, K., Bocci, V., Bonfini, G., Bonivento, W. M., Bottino, B., Bussino, S., Cadeddu, M., 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., Cicalò, C., Cocco, A. G., Covone, G., D'Angelo, D., Davini, S., Candia, A. De, Cecco, S. De, Deo, M. De, Filippis, G. De, Rosa, G. De, Derbin, A. V., Devoto, A., Eusanio, F. Di, D'Incecco, M., Pietro, G. Di, Dionisi, C., Downing, M., D'Urso, D., Edkins, E., Empl, A., Fiorillo, G., Fomenko, K., Franco, D., Gabriele, F., Galbiati, C., Ghiano, C., Giagu, S., Giganti, C., Giovanetti, G. K., Gorchakov, O., Goretti, A. M., Granato, F., Grobov, A., Gromov, M., Guan, M., Guardincerri, Y., Gulino, M., Hackett, B. R., Herner, K., Hosseini, B., Hughes, D., Humble, P., Hungerford, E. V., Ianni, Al., Ianni, An., Ippolito, V., Johnson, T. N., Keeter, K., Kendziora, C. L., Kochanek, I., Koh, G., Korablev, D., Korga, G., Kubankin, A., Kuss, M., Commara, M. La, Lai, M., Li, X., Lissia, M., Longo, G., Machado, A. A., Machulin, I. N., Mandarano, A., Mapelli, L., Mari, S. M., Maricic, J., Martoff, C. J., Messina, A., Meyers, P. D., Milincic, R., Monte, A., Morrocchi, M., Muratova, V. N., Musico, P., Agasson, A. Navrer, Nozdrina, A. O., Oleinik, A., Orsini, M., 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., Qian, H., Ragusa, F., Razeti, M., Razeto, A., Renshaw, A. L., Rescigno, M., Riffard, Q., Romani, A., Rossi, B., Rossi, N., Sablone, D., Samoylov, O., Sands, W., Sanfilippo, S., Savarese, C., 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., Suvorov, Y., Tartaglia, R., Testera, G., Tonazzo, A., Trinchese, P., Unzhakov, E. V., Verducci, M., Vishneva, A., Vogelaar, R. B., Wada, M., Waldrop, T. J., Wang, H., Wang, Y., Watson, A. W., Westerdale, S., Wojcik, M. M., Xiang, X., Xiao, X., Yang, C., Ye, Z., Zhu, C., Zuzel, G., De Candia, A., De Filippis, G., De Rosa, G., 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 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)

Subjects
axions, Physics - Instrumentation and Detectors, Dark Matter detectors (WIMPs, axions, etc.), Noble liquid detectors (scintillation, ionization, double-phase), Time projection chambers, ion: drift velocity, Time projection chambers, Analytical chemistry, FOS: Physical sciences, Noble liquid detectors (scintillation, ionization, double-phase), 01 natural sciences, radon: hadronic decay, 030218 nuclear medicine & medical imaging, Ion, Dark Matter detectors (WIMPs, axions, etc.), 03 medical and health sciences, 0302 clinical medicine, radioactivity: induced, Noble liquid detectors (scintillation, etc.), TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, ionization, 0103 physical sciences, decay: time, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], numerical calculations, Instrumentation and Methods for Astrophysics (astro-ph.IM), Instrumentation, Dark Matter detectors (WIMPs, Mathematical Physics, detector: design, Physics, 010308 nuclear & particles physics, polonium: nuclide, Instrumentation and Detectors (physics.ins-det), dark matter: detector, double-phase), time projection chamber: liquid argon, Decay time, Double phase, Time projection chamber, Liquid argon, Alpha decay, Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

Author(s): Agnes, P; Albuquerque, IFM; Alexander, T; Alton, AK; Ave, M; Back, HO; Batignani, G; Biery, K; Bocci, V; Bonfini, G; Bonivento, WM; Bottino, B; Bussino, S; Cadeddu, M; 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; Cocco, AG; Covone, G; D'Angelo, D; Davini, S; De Candia, A; De Cecco, S; De Deo, M; De Filippis, G; De Rosa, G; Derbin, AV; Devoto, A; Di Eusanio, F; D'Incecco, M; Di Pietro, G; Dionisi, C; Downing, M; D'Urso, D; Edkins, E; Empl, A; Fiorillo, G; Fomenko, K; Franco, D; Gabriele, F; Galbiati, C; Ghiano, C; Giagu, S; Giganti, C; Giovanetti, GK; Gorchakov, O; Goretti, AM; Granato, F; Grobov, A; Gromov, M; Guan, M; Guardincerri, Y; Gulino, M; Hackett, BR; Herner, K; Hosseini, B; Hughes, D; Humble, P; Hungerford, EV; Ianni, A; Ianni, A; Ippolito, V; Johnson, TN; Keeter, K; Kendziora, CL; Kochanek, I; Koh, G; Korablev, D; Korga, G; Kubankin, A; Kuss, M; La Commara, M; Lai, M | Abstract: We report measurements of the charged daughter fraction of 218Po as a result of the 222Rn alpha decay, and the mobility of 218Po+ ions, using radon-polonium coincidences from the 238U chain identified in 532 live-days of DarkSide-50 WIMP-search data. The fraction of 218Po that is charged is found to be 0.37 ± 0.03 and the mobility of 218Po+ is (8.6 ± 0.1) × 10−4 cmVs2.

Published
2019

45. Empirical decomposition and error propagation of medium-term instabilities in half-life determinations

Author

K Pelczar and S Pommé

Subjects
Physics, Propagation of uncertainty, Mathematical analysis, General Engineering, Decomposition (computer science), Half-life, Medium term
Abstract

A least-squares fit of exponential functions to a measured radioactive decay rate curve provides an estimate of the half-life and its statistical uncertainty in the assumption that all deviations from the theoretical curve are purely of a random nature. The result may be biased and the error underestimated as soon as the experiment suffers instabilities that exceed the duration of individual measurements. Contrary to long-term systematic errors, medium-frequency cyclic perturbations may be observable as autocorrelated structures in the residuals. In this work, an empirical decomposition algorithm is used to separate medium-frequency effects from the random statistical component in the fit residuals, such that custom error propagation factors can be calculated. A theoretical study of error propagation is made for sine and square wave perturbations. The empirical decomposition method is demonstrated on a synthetic spectrum, a time series of solar neutrino detection rates, and two experimental decay curves of 134Cs measured in an ionisation chamber.

Published
2021

46. Beam commissioning of the SπRIT time projection chamber

Author

Tadaaki Isobe, Hidetada Baba, Daisuke Suzuki, C. Santamaria, T. Murakami, Mizuki Kurata-Nishimura, J. Estee, W. G. Lynch, J.W. Lee, P. Lasko, Zhigang Xiao, Masanori Kaneko, Alan McIntosh, J. Łukasik, Giordano Cerizza, Byung-Sik Hong, Hideaki Otsu, Rebecca Shane, J. Barney, G. Jhang, Piotr Pawłowski, Yan Zhang, Hiroyoshi Sakurai, K. Pelczar, H. S. Lee, Sherry Yennello, M. B. Tsang, Young-Jin Kim, and S. Tangwancharoen

Subjects
Physics, Time projection chamber, 010308 nuclear & particles physics, business.industry, Beam commissioning, Detector, Electrical engineering, General Physics and Astronomy, 01 natural sciences, Dipole magnet, 0103 physical sciences, Analysis software, Electronics, 010306 general physics, business, Beam (structure)
Abstract

The SπRIT Time Projection Chamber (TPC) was constructed at Michigan State University in the U.S.A. and transported to the Radioactive Isotope Beam Factory at RIKEN in Japan. In October 2015, the SπRIT TPC was commissioned with 200 AMeV 79Se beams outside the SAMURAI dipole magnet. The experimental setup consists of the SπRIT TPC, a Multiplicity Trigger Array, a KATANA array, and a Active Veto array. The TPC is fully equipped with a newly-developed read-out electronics system, GET electronics. The trigger logic to select events of the TPC based on the ancillary detectors was tested. The analysis software, SpiRITROOT, was developed to analyze the SπRIT TPC data to determine the best trigger logic for upcoming experiments.

Published
2016

47. Searching for neutrinoless double beta decay with GERDA

Author

S. Hemmer, V. N. Kornoukhov, Matthias Laubenstein, K. Pelczar, V. G. Egorov, K. T. Knöpfle, R. Brugnera, M. Balata, A. A. Vasenko, Guillaume Lutter, T. Wester, A. M. Bakalyarov, V. I. Lebedev, A.A. Smolnikov, A. Lazzaro, V. V. Kuzminov, Matteo Agostini, C. Wiesinger, L. Vanhoefer, Thomas Kihm, B. Schneider, Anna Julia Zsigmond, M. Shirchenko, E. Doroshkevich, Manfred Lindner, L. B. Bezrukov, Oliver Schulz, Kai Zuber, C. Macolino, L. Stanco, V. V. Kazalov, E. Shevchik, O.I. Kochetov, G. Zuzel, R. Falkenstein, H. V. Kirpichnikov, Jochen Schreiner, Alberto Pullia, A. Garfagnini, D. R. Zinatulina, O. Selivanenko, V.B. Brudanin, C. Ransom, J. Janicsko, A.-K. Schütz, Hardy Simgen, Werner Hofmann, Allen Caldwell, M. Miloradovic, V. I. Gurentsov, K. N. Gusev, A. Hegai, K. Panas, T. Bode, A. Kish, A. M. Gangapshev, Marcin Wójcik, N. Di Marco, R. Mingazheva, Christian Bauer, A. Lubashevskiy, A. Domula, R. Kneiβl, Cinzia Sada, M. Junker, J. Hakenmüller, P. Grabmayr, B. Schwingenheuer, K. von Sturm, Mikael Hult, R. Hiller, Stefano Riboldi, E. Bellotti, Bayarto Lubsandorzhiev, Stefan Schönert, C. Gooch, P. Moseev, Luciano Pandola, V. Wagner, I. Zhitnikov, I. R. Barabanov, Laura Baudis, M. Misiaszek, A. A. Klimenko, M. Heisel, N. Rumyantseva, F. Salamida, S. V. Zhukov, Alessandro Bettini, B. Cattadori, A. Kirsch, Y. Kermaïdic, V. D'Andrea, Ivano Lippi, L. V. Inzhechik, W. Maneschg, E. A. Yanovich, C. Schmitt, A. V. Veresnikova, A. Chernogorov, J. Jochum Csáthy, A. Wegmann, Igor Nemchenok, Bela Majorovits, E. V. Demidova, and S. Belogurov

Subjects
Paper, Physics, History, Particle physics, Physics - Instrumentation and Detectors, Double beta decay, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), Nuclear Experiment (nucl-ex), Nuclear Experiment, ddc, Computer Science Applications, Education
Abstract

The GERmanium Detector Array (GERDA) experiment located at the INFN Gran Sasso Laboratory (Italy), is looking for the neutrinoless double beta decay of Ge76, by using high-purity germanium detectors made from isotopically enriched material. The combination of the novel experimental design, the careful material selection for radio-purity and the active/passive shielding techniques result in a very low residual background at the Q-value of the decay, about 1e-3 counts/(keV kg yr). This makes GERDA the first experiment in the field to be background-free for the complete design exposure of 100 kg yr. A search for neutrinoless double beta decay was performed with a total exposure of 47.7 kg yr: 23.2 kg yr come from the second phase (Phase II) of the experiment, in which the background is reduced by about a factor of ten with respect to the previous phase. The analysis presented in this paper includes 12.4 kg yr of new Phase II data. No evidence for a possible signal is found: the lower limit for the half-life of Ge76 is 8.0e25 yr at 90% CL. The experimental median sensitivity is 5.8e25 yr. The experiment is currently taking data. As it is running in a background-free regime, its sensitivity grows linearly with exposure and it is expected to surpass 1e26 yr within 2018., 8 pages, to appear in the proceedings of TAUP2017

Published
2020

48. Improved Limit on Neutrinoless Double- β Decay of Ge76 from GERDA Phase II

Author

L. V. Inzhechik, D. R. Zinatulina, O. Schulz, Mikael Hult, T. Comellato, V. G. Egorov, M. Balata, V. Wagner, G. Zuzel, L. Vanhoefer, C. Bauer, A. A. Vasenko, T. Bode, Stefano Riboldi, A.-K. Schütz, A. Hegai, N. Di Marco, M. Misiaszek, F. Salamida, R. Brugnera, A. Garfagnini, V. V. Kuzminov, Matteo Agostini, Manfred Lindner, J. Janicskó Csáthy, V. N. Kornoukhov, Y. Kermaïdic, A. Kish, K. Pelczar, A. V. Veresnikova, J. Hakenmüller, I. Zhitnikov, Ivano Lippi, Allen Caldwell, A. Chernogorov, M. Junker, C. Wiesinger, A. Wegmann, M. Shirchenko, R. Hiller, L. Pertoldi, Igor Nemchenok, Guillaume Lutter, A. Kirsch, O. Selivanenko, A. M. Bakalyarov, A. Lubashevskiy, W. Maneschg, S. Hemmer, M. Laubenstein, E. A. Yanovich, K. von Sturm, Bela Majorovits, R. Falkenstein, P. Grabmayr, B. Schneider, I. V. Kirpichnikov, V. I. Gurentsov, V. V. Kazalov, M. Miloradovic, D. Borowicz, J. Biernat, Bayarto Lubsandorzhiev, R. Mingazheva, C. Schmitt, B. Schwingenheuer, R. Kneißl, O.I. Kochetov, Th. Kihm, A. M. Gangapshev, P. Moseev, Luciano Pandola, A. A. Klimenko, Werner Hofmann, M. Heisel, N. Rumyantseva, A. Zschocke, Alessandro Bettini, E. V. Demidova, S. Belogurov, C. Macolino, A. Pullia, Cinzia Sada, V. D'Andrea, A. Lazzaro, S. Schönert, K. Panas, T. Wester, A.A. Smolnikov, C. Cattadori, Anna Julia Zsigmond, Kai Zuber, M. M. Wojcik, E. Bellotti, E. Doroshkevich, L. B. Bezrukov, E. Shevchik, A. Domula, L. Stanco, V.B. Brudanin, C. Ransom, Hardy Simgen, Josef Jochum, I. R. Barabanov, S. V. Zhukov, K. N. Gusev, K. T. Knöpfle, and Laura Baudis

Subjects
Semileptonic decay, Physics, 010308 nuclear & particles physics, Phase (waves), General Physics and Astronomy, chemistry.chemical_element, Germanium, Type (model theory), 01 natural sciences, chemistry, Double beta decay, 0103 physical sciences, Sensitivity (control systems), Atomic physics, 010306 general physics, Energy (signal processing), Diode
Abstract

The GERDA experiment searches for the lepton-number-violating neutrinoless double-β decay of ^{76}Ge (^{76}Ge→^{76}Se+2e^{-}) operating bare Ge diodes with an enriched ^{76}Ge fraction in liquid argon. The exposure for broad-energy germanium type (BEGe) detectors is increased threefold with respect to our previous data release. The BEGe detectors feature an excellent background suppression from the analysis of the time profile of the detector signals. In the analysis window a background level of 1.0_{-0.4}^{+0.6}×10^{-3} counts/(keV kg yr) has been achieved; if normalized to the energy resolution this is the lowest ever achieved in any 0νββ experiment. No signal is observed and a new 90% C.L. lower limit for the half-life of 8.0×10^{25} yr is placed when combining with our previous data. The expected median sensitivity assuming no signal is 5.8×10^{25} yr.

Published
2018

49. DarkSide-20k: A 20 tonne two-phase LAr TPC for direct dark matter detection at LNGS

Author

Craig E. Aalseth, P. F. Loverre, T. Viant, Fabrizio Giulio Luca Pilo, A. Vishneva, R. Perruzza, E. Segreto, P. Garcia Abia, T. N. Johnson, Manuel Colocci, Lelio Luzzi, R. Tartaglia, M. Bossa, S. Murphy, I. N. Machulin, M. Razeti, V. Pavletcov, M. Kuźniak, H. O. Back, N. Canci, P. D. Meyers, A.V. Shchagin, R. Cereseto, P. Skensved, Jocelyn Monroe, A. Buzulutskov, Davide Portaluppi, Giovanni Covone, G. Dellacasa, Vittorio Cataudella, P. Giampa, B. Rossi, D. Korablev, V. Pesudo, André Rubbia, Marco Pallavicini, Ivone F. M. Albuquerque, K. Fomenko, G. Fiorillo, G. Testera, K. Pelczar, A. Dolgov, F. Retiere, L. Shekhtman, George E. Froudakis, Mariano Cadoni, A. Moggi, L. Romero, M. La Commara, Aldo Ghisi, P. Cavalcante, S. Corgiolu, A. Oleinik, E. V. Hungerford, Cristiano Galbiati, Piero Salatino, D. D'Urso, M. Wada, Rosario Nania, M. Rescigno, Yuting Wang, T. Pollmann, Alan Watson, N. Rossi, C. J. Jillings, F. Gabriele, A. Empl, M. G. Boulay, S. Sanfilippo, A. Mandarano, S. J. M. Peeters, L. Pagani, M. D'Incecco, Alessandro Ferri, S. Westerdale, K. Keeter, R. Bunker, Claudio Piemonte, Andrea Alici, Federica Villa, D. Sablone, G. Di Pietro, Gilda Scioli, Allen Seifert, Marisa Gulino, P. Trinchese, G. Bonfini, S. Catalanotti, F. Granato, D. A. Semenov, M. Carlini, Luciano Pandola, A. Sotnikov, Min-Xin Guan, Alberto Tosi, H. Qian, M. D. Skorokhvatov, S. Bettarini, A. de Candia, An. Ianni, A. Sheshukov, W. Bonivento, V. Regazzoni, E. Pantic, F. Speziale, M. Mayer, Annalisa Vacca, X. Xiang, P. N. Singh, M. Gromov, S. Wu, A. G. Cocco, V. N. Muratova, B. Bottino, Andrea Gabrieli, Mario Giorgi, E. Sanchez Garcia, Jay W. Grate, Y. Suvorov, R. Milincic, G. Batignani, E. Bertoldo, M. Orsini, B. Radics, Giuseppe Longo, C. L. Kendziora, S. Bussino, M. Ave, V. Bocci, B. Reinhold, S. Dussoni, Eugenio Scapparone, A. L. Hallin, Richard M. Williams, S. Horikawa, B. Hosseini, S. Kim, D. Hughes, I. D'Antone, A. M. Goretti, A. S. Chepurnov, C. Giganti, I. J. Arnquist, Antonino Zichichi, A. Castellani, M. Fernandez Diaz, A. L. Renshaw, C. Filip, Silvia Arcelli, Fabio Acerbi, D. M. Asner, Monica Verducci, Marco Sant, Giovanni Paternoster, C. Dionisi, M. Da Rocha Rolo, S. Davini, C. J. Martoff, M. Marcante, M. Cadeddu, Paul H. Humble, E. Paoloni, Z. Ye, C. Cicalo, W. Mu, Laura A. Pellegrini, F. Pazzona, A. S. Kubankin, C. Savarese, G. Sobrero, Stefano Giagu, M. Caravati, A. A. Machado, Chung-Yao Yang, N. N. Nurakhov, G. Koh, Paolo Crivelli, M. Carpinelli, S. De Cecco, Fausto Ortica, G. De Rosa, I. Dormia, Federico Perotti, A. Yllera de Llano, Franco Zappa, J. Wahl, M. Guerzoni, Andrea Messina, Pietro Antonioli, Rudi Lussana, C. Cantini, Pierfranco Demontis, B. Vogelaar, O. Gorchakov, Angelo Rivetti, Simonetta Palmas, Hui Wang, Ben Loer, A. Devoto, J. Walding, Paolo Musico, Alberto Gola, G. Gibertoni, Thomas Alexander, I. Nikulin, D. A. Pugachev, R. Stainforth, A. Monte, A. V. Derbin, Andrey Sokolov, G. Zuzel, J. Maricic, A. B. McDonald, A. Zullo, L. Cifarelli, R. Santorelli, Giuseppe Baldovino Suffritti, Yanhui Ma, B. Schlitzer, Marino Simeone, Stefania Moioli, D. Franco, Michele Mascia, Mario Mariani, Raffaele Ardito, M. K. Daniel, C. Stanford, Mauro Citterio, A.E. Bondar, Caoxiang Zhu, O. Samoylov, Francesco Ragusa, R. K. Haaland, A. Gendotti, M. De Deo, G. Y. Grigoriev, A. Caminata, A. K. Alton, G. U. Lodi, G. Korga, Q. Riffard, M. Zullo, Xiujiang Li, Marco Grassi, M. Della Valle, C. Regenfus, Eric W. Hoppe, E. Vázquez-Jáuregui, L. Mapelli, Stefano Maria Mari, A. Tonazzo, A. Barrado Olmedo, V. Oleynikov, F. Di Eusanio, Maria Giuseppina Bisogni, B. J. Mount, Matteo Morrocchi, M. Kuss, E. Shemyakina, A. Candela, Aldo Romani, P. Agnes, G. K. Giovanetti, B. Lehnert, A. Razeto, Stefano Cavuoti, A. Navrer Agasson, V. Nosov, M. Cariello, N. Pelliccia, Simone Rizzardini, G. De Guido, M. Lissia, G. De Filippis, Marcin Wójcik, Anselmo Margotti, Xiang Xiao, Marcelo Braga Bueno Guerra, W. Sands, M. L. Gligan, A. O. Nozdrina, F. Raffaelli, G. Zappalà, A. Pocar, O. Smirnov, E. V. Unzhakov, B. Harrop, Istituto Nazionale di Fisica Nucleare, Sezione di Bologna (INFN, Sezione di Bologna), Istituto Nazionale di Fisica Nucleare (INFN), LVMH Recherche, LVMH Moët Hennessy Louis Vuitton, Dipartimento di Scienze Fisiche [Naples], Università degli studi di Napoli Federico II, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut de recherches sur la catalyse et l'environnement de Lyon (IRCELYON), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Dipartimento di Meccanica, Matematica e Management Politecnico di Bari, 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), 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), Istituto Nazionale di Fisica Nucleare [Pisa] (INFN), Department of Electrical Engineering, University of Pavia, Laboratorio de Instrumentaçao, Engenharia Biomédica e Fisica da Radiaçao (LIBPhys-UNL), Departamento de Fìsica [Lisboa] (DF), Faculdade de Ciências e Tecnologia = School of Science & Technology (FCT NOVA), Universidade Nova de Lisboa = NOVA University Lisbon (NOVA)-Universidade Nova de Lisboa = NOVA University Lisbon (NOVA)-Faculdade de Ciências e Tecnologia = School of Science & Technology (FCT NOVA), Universidade Nova de Lisboa = NOVA University Lisbon (NOVA)-Universidade Nova de Lisboa = NOVA University Lisbon (NOVA), Paul Scherrer Institute (PSI), Istituto Nazionale di Fisica Nucleare, Sezione di Napoli (INFN, Sezione di Napoli), Biochimie et Physiologie Moléculaire des Plantes (BPMP), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut National de la Recherche Agronomique (INRA)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Laboratoire de Biochimie et Biologie Moléculaire Végétales - UMR6134, Université Pascal Paoli (UPP)-Centre National de la Recherche Scientifique (CNRS), Department of Geological Sciences, University of Michigan [Ann Arbor], University of Michigan System-University of Michigan System, Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique (LERMA), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Centre National de la Recherche Scientifique (CNRS), Istituto Nazionale di Fisica Nucleare, Sezione di Torino (INFN, Sezione di Torino), Migration et différenciation des cellules souches hématopoiétiques = Migration and differentiation of hematopoietic stem cells (LBD-E06), Institut National de la Santé et de la Recherche Médicale (INSERM)-Laboratoire de Biologie du Développement (LBD), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de Biologie Paris Seine (IBPS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de Biologie Paris Seine (IBPS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Department of Microsystems Engineering [Freiburg] (IMTEK), University of Freiburg [Freiburg], Pondicherry Univrsity, Department of Earth Sciences, School of Physical, Chemical & Applied Sciences, Rhodes University, Grahamstown, inconnu, Inconnu, Key Lab of Computer System and Architecture, Institute of Computing Technology [Beijing] (ICT), Chinese Academy of Sciences [Beijing] (CAS), Centre for Ultrahigh Bandwidth Devices for Optical Systems (CUDOS), Macquarie University, Laboratoire Géophysique et évaluation non destructive (IFSTTAR/GERS/GeoEND), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-PRES Université Nantes Angers Le Mans (UNAM), Aalseth, C. E., Acerbi, F., Agnes, P., Albuquerque, I. F. M., Alexander, T., Alici, A., Alton, A. K., Antonioli, P., Arcelli, S., Ardito, R., Arnquist, I. J., Asner, D. M., Ave, M., Back, H. O., Barrado Olmedo, A. I., Batignani, G., Bertoldo, E., Bettarini, S., Bisogni, M. G., Bocci, V., Bondar, A., Bonfini, G., Bonivento, W., Bossa, M., Bottino, B., Boulay, M., Bunker, R., Bussino, S., Buzulutskov, A., Cadeddu, M., Cadoni, M., Caminata, A., Canci, N., Candela, A., Cantini, C., Caravati, M., Cariello, M., Carlini, M., Carpinelli, M., Castellani, A., Catalanotti, S., Cataudella, V., Cavalcante, P., Cavuoti, S., Cereseto, R., Chepurnov, A., Cicalò, C., Cifarelli, L., Citterio, M., Cocco, A. G., Colocci, M., Corgiolu, S., Covone, G., Crivelli, P., D’Antone, I., D’Incecco, M., D’Urso, D., Da Rocha Rolo, M. D., Daniel, M., Davini, S., de Candia, A., De Cecco, S., De Deo, M., De Filippis, G., De Guido, G., De Rosa, G., Dellacasa, G., Della Valle, M., Demontis, P., Derbin, A., Devoto, A., Di Eusanio, F., Di Pietro, G., Dionisi, C., Dolgov, A., Dormia, I., Dussoni, S., Empl, A., Fernandez Diaz, M., Ferri, A., Filip, C., Fiorillo, G., Fomenko, K., Franco, D., Froudakis, G. E., Gabriele, F., Gabrieli, A., Galbiati, C., Garcia Abia, P., Gendotti, A., Ghisi, A., Giagu, S., Giampa, P., Gibertoni, G., Giganti, C., Giorgi, M. A., Giovanetti, G. K., Gligan, M. L., Gola, A., Gorchakov, O., Goretti, A. M., Granato, F., Grassi, M., Grate, J. W., Grigoriev, G. Y., Gromov, M., Guan, M., Guerra, M. B. B., Guerzoni, M., Gulino, M., Haaland, R. K., Hallin, A., Harrop, B., Hoppe, E. W., Horikawa, S., Hosseini, B., Hughes, D., Humble, P., Hungerford, E. V., Ianni, An., Jillings, C., Johnson, T. N., Keeter, K., Kendziora, C. L., Kim, S., Koh, G., Korablev, D., Korga, G., Kubankin, A., Kuss, M., Kuźniak, M., La Commara, M., Lehnert, B., Li, X., Lissia, M., Lodi, G. U., Loer, B., Longo, G., Loverre, P., Lussana, R., Luzzi, L., Ma, Y., Machado, A. A., Machulin, I. N., Mandarano, A., Mapelli, L., Marcante, M., Margotti, A., Mari, S. M., Mariani, M., Maricic, J., Martoff, C. J., Mascia, M., Mayer, M., Mcdonald, A. B., Messina, A., Meyers, P. D., Milincic, R., Moggi, A., Moioli, S., Monroe, J., Monte, A., Morrocchi, M., Mount, B. J., Mu, W., Muratova, V. N., Murphy, S., Musico, P., Nania, R., Navrer Agasson, A., Nikulin, I., Nosov, V., Nozdrina, A. O., Nurakhov, N. N., Oleinik, A., Oleynikov, V., Orsini, M., Ortica, F., Pagani, L., Pallavicini, M., Palmas, S., Pandola, L., Pantic, E., Paoloni, E., Paternoster, G., Pavletcov, V., Pazzona, F., Peeters, S., Pelczar, K., Pellegrini, L. A., Pelliccia, N., Perotti, F., Perruzza, R., Pesudo, V., Piemonte, C., Pilo, F., Pocar, A., Pollmann, T., Portaluppi, D., Pugachev, D. A., Qian, H., Radics, B., Raffaelli, F., Ragusa, F., Razeti, M., Razeto, A., Regazzoni, V., Regenfus, C., Reinhold, B., Renshaw, A. L., Rescigno, M., Retière, F., Riffard, Q., Rivetti, A., Rizzardini, S., Romani, A., Romero, L., Rossi, B., Rossi, N., Rubbia, A., Sablone, D., Salatino, P., Samoylov, O., Sánchez García, E., Sands, W., Sanfilippo, S., Sant, M., Santorelli, R., Savarese, C., Scapparone, E., Schlitzer, B., Scioli, G., Segreto, E., Seifert, A., Semenov, D. A., Shchagin, A., Shekhtman, L., Shemyakina, E., Sheshukov, A., Simeone, M., Singh, P. N., Skensved, P., Skorokhvatov, M. D., Smirnov, O., Sobrero, G., Sokolov, A., Sotnikov, A., Speziale, F., Stainforth, R., Stanford, C., Suffritti, G. B., Suvorov, Y., Tartaglia, R., Testera, G., Tonazzo, A., Tosi, A., Trinchese, P., Unzhakov, E. V., Vacca, A., Vázquez-Jáuregui, E., Verducci, M., Viant, T., Villa, F., Vishneva, A., Vogelaar, B., Wada, M., Wahl, J., Walding, J., Wang, H., Wang, Y., Watson, A. W., Westerdale, S., Williams, R., Wojcik, M. M., Wu, S., Xiang, X., Xiao, X., Yang, C., Ye, Z., Yllera de Llano, A., Zappa, F., Zappalà, G., Zhu, C., Zichichi, A., Zullo, M., Zullo, A., Zuzel, G., National Institute for Nuclear Physics (INFN), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Unité de Catalyse et de Chimie du Solide - Site Artois (UCCS Artois), Université d'Artois (UA)-Université de Lille, Sciences et Technologies-Ecole Centrale de Lille-Ecole Nationale Supérieure de Chimie de Lille (ENSCL)-Centre National de la Recherche Scientifique (CNRS), 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), Faculdade de Ciências e Tecnologia (FCT NOVA), Universidade Nova de Lisboa (NOVA)-Universidade Nova de Lisboa (NOVA)-Faculdade de Ciências e Tecnologia (FCT NOVA), Universidade Nova de Lisboa (NOVA)-Universidade Nova de Lisboa (NOVA), Université de Montpellier (UM)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro)-Institut National de la Recherche Agronomique (INRA)-Centre National de la Recherche Scientifique (CNRS), Université de Corse, CNRS UMR6134 SPE, Laboratoire de Biochimie et Biologie Moléculaire Végétales, 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), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de Biologie Paris Seine (IBPS), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Department of Microsystems Engineering - IMTEK, Rhodes University, Aalseth, C, Acerbi, F, Agnes, P, Albuquerque, I, Alexander, T, Alici, A, Alton, A, Antonioli, P, Arcelli, S, Ardito, R, Arnquist, I, Asner, D, Ave, M, Back, H, Barrado Olmedo, A, Batignani, G, Bertoldo, E, Bettarini, S, Bisogni, M, Bocci, V, Bondar, A, Bonfini, G, Bonivento, W, Bossa, M, Bottino, B, Boulay, M, Bunker, R, Bussino, S, Buzulutskov, A, Cadeddu, M, Cadoni, M, Caminata, A, Canci, N, Candela, A, Cantini, C, Caravati, M, Cariello, M, Carlini, M, Carpinelli, M, Castellani, A, Catalanotti, S, Cataudella, V, Cavalcante, P, Cavuoti, S, Cereseto, R, Chepurnov, A, Cicalo', C, Cifarelli, L, Citterio, M, Cocco, A, Colocci, M, Corgiolu, S, Covone, G, Crivelli, P, D’Antone, I, D’Incecco, M, D’Urso, D, Da Rocha Rolo, M, Daniel, M, Davini, S, de Candia, A, De Cecco, S, De Deo, M, De Filippis, G, De Guido, G, De Rosa, G, Dellacasa, G, Della Valle, M, Demontis, P, Derbin, A, Devoto, A, Di Eusanio, F, Di Pietro, G, Dionisi, C, Dolgov, A, Dormia, I, Dussoni, S, Empl, A, Fernandez Diaz, M, Ferri, A, Filip, C, Fiorillo, G, Fomenko, K, Franco, D, Froudakis, G, Gabriele, F, Gabrieli, A, Galbiati, C, Garcia Abia, P, Gendotti, A, Ghisi, A, Giagu, S, Giampa, P, Gibertoni, G, Giganti, C, Giorgi, M, Giovanetti, G, Gligan, M, Gola, A, Gorchakov, O, Goretti, A, Granato, F, Grassi, M, Grate, J, Grigoriev, G, Gromov, M, Guan, M, Guerra, M, Guerzoni, M, Gulino, M, Haaland, R, Hallin, A, Harrop, B, Hoppe, E, Horikawa, S, Hosseini, B, Hughes, D, Humble, P, Hungerford, E, Ianni, A, Jillings, C, Johnson, T, Keeter, K, Kendziora, C, Kim, S, Koh, G, Korablev, D, Korga, G, Kubankin, A, Kuss, M, Kúzniak, M, La Commara, M, Lehnert, B, Li, X, Lissia, M, Lodi, G, Loer, B, Longo, G, Loverre, P, Lussana, R, Luzzi, L, Ma, Y, Machado, A, Machulin, I, Mandarano, A, Mapelli, L, Marcante, M, Margotti, A, Mari, S, Mariani, M, Maricic, J, Martoff, C, Mascia, M, Mayer, M, Mcdonald, A, Messina, A, Meyers, P, Milincic, R, Moggi, A, Moioli, S, Monroe, J, Monte, A, Morrocchi, M, Mount, B, Mu, W, Muratova, V, Murphy, S, Musico, P, Nania, R, Navrer Agasson, A, Nikulin, I, Nosov, V, Nozdrina, A, Nurakhov, N, Oleinik, A, Oleynikov, V, Orsini, M, Ortica, F, Pagani, L, Pallavicini, M, Palmas, S, Pandola, L, Pantic, E, Paoloni, E, Paternoster, G, Pavletcov, V, Pazzona, F, Peeters, S, Pelczar, K, Pellegrini, L, Pelliccia, N, Perotti, F, Perruzza, R, Pesudo, V, Piemonte, C, Pilo, F, Pocar, A, Pollmann, T, Portaluppi, D, Pugachev, D, Qian, H, Radics, B, Raffaelli, F, Ragusa, F, Razeti, M, Razeto, A, Regazzoni, V, Regenfus, C, Reinhold, B, Renshaw, A, Rescigno, M, Retière, F, Riffard, Q, Rivetti, A, Rizzardini, S, Romani, A, Romero, L, Rossi, B, Rossi, N, Rubbia, A, Sablone, D, Salatino, P, Samoylov, O, Sánchez García, E, Sands, W, Sanfilippo, S, Sant, M, Santorelli, R, Savarese, C, Scapparone, E, Schlitzer, B, Scioli, G, Segreto, E, Seifert, A, Semenov, D, Shchagin, A, Shekhtman, L, Shemyakina, E, Sheshukov, A, Simeone, M, Singh, P, Skensved, P, Skorokhvatov, M, Smirnov, O, Sobrero, G, Sokolov, A, Sotnikov, A, Speziale, F, Stainforth, R, Stanford, C, Suffritti, G, Suvorov, Y, Tartaglia, R, Testera, G, Tonazzo, A, Tosi, A, Trinchese, P, Unzhakov, E, Vacca, A, Vázquez-Jáuregui, E, Verducci, M, Viant, T, Villa, F, Vishneva, A, Vogelaar, B, Wada, M, Wahl, J, Walding, J, Wang, H, Wang, Y, Watson, A, Westerdale, S, Williams, R, Wojcik, M, Wu, S, Xiang, X, Xiao, X, Yang, C, Ye, Z, Yllera de Llano, A, Zappa, F, Zappalà, G, Zhu, C, Zichichi, A, Zullo, M, Zullo, A, Zuzel, G, University of Naples Federico II = Università degli studi di Napoli Federico II, 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), Università degli Studi di Pavia = University of Pavia (UNIPV), Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), École normale supérieure - Paris (ENS-PSL), Laboratoire de Biologie du Développement (LBD), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM), 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 la Santé et de la Recherche Médicale (INSERM)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM), Kúzniak, M., Trinchese, Pasquale, Aalseth, C.E., Albuquerque, I.F.M., Alton, A.K., Arnquist, I.J., Asner, D.M., Back, H.O., Barrado Olmedo, A.I., Bisogni, M.G., Cocco, A.G., Da Rocha Rolo, M.D., Froudakis, G.E., Giorgi, M.A., Giovanetti, G.K., Gligan, M.L., Goretti, A.M., Grate, J.W., Grigoriev, G.Y., Guerra, M.B.B., Haaland, R.K., Hoppe, E.W., Hungerford, E.V., Johnson, T.N., Kendziora, C.L., Lodi, G.U., Machado, A.A., Machulin, I.N., Mari, S.M., Martoff, C.J., McDonald, A.B., Meyers, P.D., Mount, B.J., Muratova, V.N., Nozdrina, A.O., Nurakhov, N.N., Pellegrini, L.A., Pugachev, D.A., Renshaw, A.L., Semenov, D.A., Singh, P.N., Skorokhvatov, M.D., Suffritti, G.B., Unzhakov, E.V., Watson, A.W., Wojcik, M.M., Unité de Catalyse et Chimie du Solide - Equipes du Site Artois (UCCS Artois), Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Ecole Nationale Supérieure de Chimie de Lille (ENSCL)-Ecole Centrale de Lille-Université d'Artois (UA)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Ecole Nationale Supérieure de Chimie de Lille (ENSCL)-Ecole Centrale de Lille-Université d'Artois (UA), Universidade Nova de Lisboa = NOVA University of Lisboa (NOVA)-Universidade Nova de Lisboa = NOVA University of Lisboa (NOVA)-Faculdade de Ciências e Tecnologia (FCT NOVA), and Universidade Nova de Lisboa = NOVA University of Lisboa (NOVA)-Universidade Nova de Lisboa = NOVA University of Lisboa (NOVA)

Subjects
Particle physics, VAPOR-PRESSURE, Physics - Instrumentation and Detectors, Solar neutrino, Dark matter, General Physics and Astronomy, FOS: Physical sciences, Scintillator, SCINTILLATION EFFICIENCY, 01 natural sciences, PROPERTIES, Nuclear physics, Physics and Astronomy (all), Silicon photomultiplier, WIMP, LIQUID-ARGON, RADIOACTIVITY, DESIGN, SEARCH, 0103 physical sciences, ISOTOPIC LIQUIDS, 010306 general physics, Cherenkov radiation, ComputingMilieux_MISCELLANEOUS, Physics, [PHYS]Physics [physics], Time projection chamber, 010308 nuclear & particles physics, Detector, Instrumentation and Detectors (physics.ins-det), MODEL, THERMODYNAMIC, IONIZATION, Dark Matter – WIMP – Nobel Liquid Detector – Low-background Detectors – Liquid Scintillator – SiPM – Silicon Photomultiplier – Underground Argon – Low-radioactivity Argon, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

Building on the successful experience in operating the DarkSide-50 detector, the DarkSide Collaboration is going to construct DarkSide-20k, a direct WIMP search detector using a two-phase Liquid Argon Time Projection Chamber (LAr TPC) with an active (fiducial) mass of 23 t (20 t). This paper describes a preliminary design for the experiment, in which the DarkSide-20k LAr TPC is deployed within a shield/veto with a spherical Liquid Scintillator Veto (LSV) inside a cylindrical Water Cherenkov Veto (WCV). This preliminary design provides a baseline for the experiment to achieve its physics goals, while further development work will lead to the final optimization of the detector parameters and an eventual technical design. Operation of DarkSide-50 demonstrated a major reduction in the dominant 39Ar background when using argon extracted from an underground source, before applying pulse shape analysis. Data from DarkSide-50, in combination with MC simulation and analytical modeling, shows that a rejection factor for discrimination between electron and nuclear recoils of $>3 \times 10^{9}$ is achievable. This, along with the use of the veto system and utilizing silicon photomultipliers in the LAr TPC, are the keys to unlocking the path to large LAr TPC detector masses, while maintaining an experiment in which less than $< 0.1$ events (other than $\nu$ -induced nuclear recoils) is expected to occur within the WIMP search region during the planned exposure. DarkSide-20k will have ultra-low backgrounds than can be measured in situ, giving sensitivity to WIMP-nucleon cross sections of $1.2 \times 10^{-47}$ cm2 ( $1.1 \times 10^{-46}$ cm2) for WIMPs of 1 TeV/c2 (10 TeV/c2) mass, to be achieved during a 5 yr run producing an exposure of 100 t yr free from any instrumental background.

Published
2018

50. Mitigation of $$^{42}$$42Ar/$$^{42}$$42K background for the GERDA Phase II experiment

Author

K. Pelczar, A. M. Gangapshev, A. A. Klimenko, K. N. Gusev, M. Heisel, A. Lubashevskiy, B. Lehnert, A.A. Smolnikov, A. Lazzaro, Stefan Schönert, Matteo Agostini, D. Budjáš, Marc Walter, and G. Zuzel

Subjects
Physics, Scintillation, Argon, Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, Continuous spectrum, chemistry.chemical_element, lcsh:Astrophysics, Germanium, Electron, 01 natural sciences, Ion, Nuclear physics, chemistry, Double beta decay, lcsh:QB460-466, 0103 physical sciences, lcsh:QC770-798, lcsh:Nuclear and particle physics. Atomic energy. Radioactivity, Decay chain, 010306 general physics, Engineering (miscellaneous)
Abstract

Background coming from the $$^{42}$$ Ar decay chain is considered to be one of the most relevant for the Gerda experiment, which searches for the neutrinoless double beta decay of $$^{76}$$ Ge. The sensitivity strongly relies on the absence of background around the Q-value of the decay. Background coming from $$^{42}$$ K, a progeny of $$^{42}$$ Ar, can contribute to that background via electrons from the continuous spectrum with an endpoint at 3.5 MeV. Research and development on the suppression methods targeting this source of background were performed at the low-background test facility LArGe . It was demonstrated that by reducing $$^{42}$$ K ion collection on the surfaces of the broad energy germanium detectors in combination with pulse shape discrimination techniques and an argon scintillation veto, it is possible to suppress $$^{42}$$ K background by three orders of magnitude. This is sufficient for Phase II of the Gerda experiment.

Published
2018

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