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3. Erratum to: Several Articles in JETP Letters

Author

S. B. Shaulov, V. A. Ryabov, A. L. Shepetov, S. E. Pyatovsky, V. V. Zhukov, E. A. Kupriyanova, E. N. Gudkova, Yu. M. Gavrilyuk, A. N. Gangapshev, A. V. Derbin, I. S Drachnev, V. V. Kazalov, V. V. Kuzminov, M. S. Mikulich, V. N. Muratova, D. A. Tekueva, E. V. Unzhakov, S. P. Yakimenko, S. V. Sazonov, B. I. Bantysh, K. G. Katamadze, Yu. I. Bogdanov, K. I. Gerasimov, M. M. Minnegaliev, R. V. Urmancheev, S. A. Moiseev, I. Yu. Zudin, M. E. Gushchin, A. V. Strikovskiy, S. V. Korobkov, I. A. Petrova, A. N. Katkov, V. V. Kochedykov, S. Bondarenko, and M. A. Zubkov

Subjects
Physics and Astronomy (miscellaneous)
Abstract

An Erratum to this paper has been published: https://doi.org/10.1134/S0021364022390011

Published
2022

4. New Constraints on the Axion–Electron Coupling Constant for Solar Axions

Author

Yu. M. Gavrilyuk, A. N. Gangapshev, A. V. Derbin, I. S. Drachnev, V. V. Kazalov, V. V. Kuzminov, M. S. Mikulich, V. N. Muratova, D. A. Tekueva, E. V. Unzhakov, and S. P. Yakimenko

Subjects
Physics and Astronomy (miscellaneous)
Abstract

The resonant excitation of the 83Kr first excited nuclear level (E = 9.4 keV) by solar axions whose fluxes depend on the axion–electron coupling constant gAe is sought. The γ- and X-ray photons and the conversion and Auger electrons from the excited-level relaxation are detected with a gas proportional counter of a low-background detector in the underground Baksan Neutrino Observatory (Institute for Nuclear Research, Russian Academy of Sciences). As a result, a new constraint $${\text{|}}{{g}_{{Ae}}}(g_{{AN}}^{3} - g_{{AN}}^{0}){\text{|}}$$ ≤ 1.50 × 10–17 (90% C.L.) has been obtained for the axion–electron and axion–nucleon coupling constants, which corresponds to new constraints on the axion mass mA ≤ 320 eV and mA ≤ 4.6 eV in the KSVZ and DFSZ axion models, respectively.

Published
2022

6. A Silicon 4π Spectrometer of β-Decay Electrons with Energies of up to 3 MeV

Author

I. M. Kotina, M. V. Trushin, D. A. Semenov, V. N. Muratova, I. E. Alekseev, E. A. Chmel, S. V. Bakhlanov, I. S. Drachnev, E. V. Unzhakov, A. V. Derbin, and N. V. Niyazova

Subjects
010302 applied physics, Materials science, Spectrometer, Silicon, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, Detector, chemistry.chemical_element, Electron, 01 natural sciences, Spectral line, Coincidence, Crystal, chemistry, Excited state, 0103 physical sciences, Atomic physics, Nuclear Experiment, Instrumentation
Abstract

A 4π β spectrometer consists of two Si(Li) detectors with a sensitive region that is more than 8-mm thick. Using this total-absorption spectrometer it is possible to make a direct measurement of β spectra without correcting the response function for the electron backscattering from the crystal surface. The β spectra of transitions to the excited states of daughter nuclei have been measured using an additional 3'' BGO detector of γ rays, which is connected in coincidence with the pair of Si(Li) detectors.

Published
2021

7. SEARCH FOR SOLAR AXIONS IN BNO INR RAS

Author

E. V. Unzhakov, V. Kazalov, V. V. Kuzminov, A. V. Derbin, D. A. Tekueva, S. I. Panasenko, I. S. Drachnev, S. S. Ratkevich, A. M. Gangapshev, V. V. Kobychev, A. Yu. Zavrazhnov, V. N. Muratova, Z. A. Akhmatov, S. S. Berezin, Yu. M. Gavrilyuk, and A. Kh. Khokonov

Published
2021

8. Precision measurement of the Bi210 β spectrum

Author

V. N. Muratova, E. V. Unzhakov, I. S. Drachnev, S. V. Bakhlanov, M. V. Trushin, D. A. Semenov, N. V. Niyazova, I. E. Alekseev, I. S. Lomskaya, A. V. Derbin, and I. M. Kotina

Subjects
Physics, 010308 nuclear & particles physics, 0103 physical sciences, Spectrum (functional analysis), Form factor (quantum field theory), Atomic physics, 010306 general physics, 01 natural sciences, Nuclear theory
Abstract

The precision measurement of $\ensuremath{\beta}$-spectrum shape for $^{210}\mathrm{Bi}$ (historically RaE) has been performed with a spectrometer based on semiconductor Si(Li) detector. This first forbidden nonunique transition has the transition form factor strongly deviated from unity, and knowledge of its spectrum would play an important role in low-background physics in the presence of $^{210}\mathrm{Pb}$ background. The measured transition formfactor could be approximated as $C(W)=1+(\ensuremath{-}0.4470\ifmmode\pm\else\textpm\fi{}0.0013)W+(0.0552\ifmmode\pm\else\textpm\fi{}0.0004){W}^{2}$, that is in good agreement with previous studies and has significantly increased parameter precision.

Published
2020

9. Improved measurement of B8 solar neutrinos with 1.5 kt·y of Borexino exposure

Author

R. Tartaglia, G. Bellini, A. Di Ludovico, Aldo Ianni, N. Pilipenko, G. Manuzio, Matthias Laubenstein, M. Redchuk, I. N. Machulin, D. Kryn, J. Martyn, A. V. Derbin, M. D. Skorokhvatov, Michael Wurm, E. Litvinovich, D. D'Angelo, N. Rossi, E. Meroni, R. B. Vogelaar, S. Appel, J. Thurn, R. Roncin, B. Opitz, O. Smirnov, D. A. Semenov, G. Zuzel, Z. Yokley, G. Bonfini, Xuefeng Ding, D. Bravo, Andrea Ianni, Kai Zuber, D. Bick, V. Atroshchenko, Frank Calaprice, L. Lukyanchenko, Sandra Zavatarelli, T. Houdy, A. Porcelli, B. Caccianiga, Gioacchino Ranucci, E. V. Unzhakov, Z. Bagdasarian, Lothar Oberauer, O. Zaimidoroga, H. Wang, M. M. Wojcik, Matteo Agostini, C. Ghiano, Caren Hagner, Aldo Romani, Andrey Formozov, A. Jany, S. Weinz, Y. Suvorov, L. Di Noto, V. V. Kobychev, Alessandra Re, D. Franco, E. V. Hungerford, P. Cavalcante, D. Jeschke, M. Misiaszek, K. Altenmueller, A. Sotnikov, L.F.F. Stokes, D. Basilico, S. Schoenert, S. Davini, V. N. Muratova, F. von Feilitzsch, M. S. Meyer, Lino Miramonti, S. Caprioli, Paolo Lombardi, A. Pocar, Jay Burton Benziger, A. M. Goretti, V. Orekhov, L. Papp, F. Lombardi, G. Lukyanchenko, Fausto Ortica, A. Razeto, D. Guffanti, M. Carlini, B. Neumair, G. Korga, Marco Giammarchi, K. Fomenko, I. S. Drachnev, K. Choi, M. Gromov, A. Caminata, Marco Pallavicini, F. Gabriele, S. Marcocci, M. Toropova, L. Collica, Ö. Penek, G. Testera, C. Galbiati, Livia Ludhova, A. S. Chepurnov, A. Vishneva, and Denis Korablev

Subjects
Physics, Elastic scattering, Particle physics, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, Solar neutrino, Solar neutrino problem, 01 natural sciences, Nuclear physics, Neutrino detector, 0103 physical sciences, Measurements of neutrino speed, High Energy Physics::Experiment, Neutrino, 010306 general physics, Neutrino oscillation, Borexino
Abstract

We report on an improved measurement of the $^8$B solar neutrino interaction rate with the Borexino experiment at the Laboratori Nazionali del Gran Sasso. Neutrinos are detected via their elastic scattering on electrons in a large volume of liquid scintillator. The measured rate of scattered electrons above 3 MeV of energy is $0.223\substack{+0.015 \\ -0.016}\,(stat)\,\substack{+0.006 \\ -0.006}\,(syst)$ cpd/100 t, which corresponds to an observed solar neutrino flux assuming no neutrino flavor conversion of $\Phi\substack{\rm ES \\ ^8\rm B}=2.57\substack{+0.17 \\ -0.18}(stat)\substack{+0.07\\ -0.07}(syst)\times$10$^6$ cm$^{-2}\,$s$^{-1}$. This measurement exploits the active volume of the detector in almost its entirety for the first time, and takes advantage of a reduced radioactive background following the 2011 scintillator purification campaign and of novel analysis tools providing a more precise modeling of the background. Additionally, we set a new limit on the interaction rate of solar $hep$ neutrinos, searched via their elastic scattering on electrons as well as their neutral current-mediated inelastic scattering on carbon, $^{12}$C($\nu,\nu'$)$^{12}$C* ($E_{\gamma}$= 15.1 MeV).

Published
2020

10. New limits on the resonant absorption of solar axions obtained with a $^{169}$Tm-containing cryogenic detector

Author

M. V. Trushin, L. Canonica, S. E. Sarkisov, J. Rothe, Matthias Laubenstein, N. Ferreiro Iachellini, S. V. Bakhlanov, Denis A. Lis, S.S. Nagorny, Stefano Nisi, A. H. Abdelhameed, I. S. Drachnev, V. V. Ryabchenkov, F. Petricca, V. N. Muratova, Peter Bauer, D. Fuchs, Kirill A. Subbotin, D. A. Semenov, A.C.S.S.M. Bento, F. Proebst, A. V. Derbin, M. Mancuso, I. S. Lomskaya, Evgeny V Zharikov, E. Bertoldo, E. V. Unzhakov, and D. Hauff

Subjects
Astroparticle physics, Physics, Physics - Instrumentation and Detectors, Physics and Astronomy (miscellaneous), Detector, Bolometer, FOS: Physical sciences, Resonant absorption, Instrumentation and Detectors (physics.ins-det), law.invention, High Energy Physics - Experiment, Crystal, High Energy Physics - Phenomenology, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), Astrophysics - Solar and Stellar Astrophysics, law, Sensitivity (control systems), Atomic physics, Engineering (miscellaneous), Axion, Solar and Stellar Astrophysics (astro-ph.SR)
Abstract

A search for resonant absorption of solar axions by $^{169}$Tm nuclei was carried out. A newly developed approach involving low-background cryogenic bolometer based on Tm$_3$Al$_5$O$_{12}$ crystal was used that allowed for significant improvement of sensitivity in comparison with previous $^{169}$Tm based experiments. The measurements performed with $8.18$ g crystal during $6.6$ days exposure yielded the following limits on axion couplings: $|g_{A\gamma} (g_{AN}^0 + g_{AN}^3) \leq 1.44 \times 10^{-14}$ GeV$^{-1}$ and $|g_{Ae} (g_{AN}^0 + g_{AN}^3) \leq 2.81 \times 10^{-16}$., Comment: 7 pages, 5 figures

Published
2020
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11. Search for a Neutrino with a Mass of 0.01–1.0 MeV in Beta Decays of 144Ce–144Pr Nuclei

Author

A. V. Derbin, V. N. Muratova, I. S. Drachnev, E. V. Unzhakov, L. M. Tukkhonen, D. A. Semenov, N. V. Pilipenko, A. Kh. Khusainov, and I. S. Lomskaya

Subjects
Physics, Physics and Astronomy (miscellaneous), Solid-state physics, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Electron, 01 natural sciences, Upper and lower bounds, Spectral line, Nuclear physics, Beta (plasma physics), 0103 physical sciences, High Energy Physics::Experiment, Heavy neutrino, Neutrino, 010306 general physics, Mixing (physics)
Abstract

Spectra of electrons from beta decays of 144Ce–144Pr nuclei have been measured and analyzed in order to find a contribution from a heavy neutrino. For the neutrino with the mass mνH in the interval of 150–350 keV, a new upper bound |UeH|2 ≤ (2−5) × 10−3 at 90% C.L. has been found for the mixing parameter.

Published
2018

12. New Constraints on the Axion–Photon Coupling Constant for Solar Axions

Author

V. V. Kuzminov, A. N. Gangapshev, V. N. Muratova, V. V. Kazalov, V. V. Kobychev, D. A. Tekueva, A. V. Derbin, Yu. M. Gavrilyuk, E. V. Unzhakov, S. S. Ratkevich, I. S. Drachnev, S. P. Yakimenko, and S. I. Panasenko

Subjects
Physics, Coupling constant, Photon, Physics and Astronomy (miscellaneous), Auger effect, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Relaxation (NMR), Proportional counter, 01 natural sciences, Nuclear physics, High Energy Physics::Theory, symbols.namesake, Observatory, 0103 physical sciences, symbols, High Energy Physics::Experiment, Neutrino, 010306 general physics, Axion
Abstract

Resonance excitation of the 83Kr first nuclear level (E = 9.4 keV) by solar axions formed via the Primakoff mechanism is sought. The γ- and X-ray photons and the conversion and Auger electrons arising from the excited-level relaxation are detected with a gas proportional counter of a low-background detector in the underground Baksan Neutrino Observatory. The following experimental constraint is obtained for the product of the axion–photon coupling constant and the axion mass:|gAγ × mA| ≤ 6.3 × 10 -17 In the framework of the hadronic-axion model, this corresponds to a new axion-mass constraint of mA ≤ 12.7 eV at 95% C.L.

Published
2018

13. Beta-spectrometer with Si-detectors for the study of 144Ce–144Pr decays

Author

N. V. Bazlov, V. N. Muratova, V.K. Yeremin, N. V. Pilipenko, E. A. Chmel, E. V. Unzhakov, I.E. Alexeev, S. V. Bakhlanov, I. S. Drachnev, A. V. Derbin, D.A. Semyonov, and I. M. Kotina

Subjects
Physics, Nuclear and High Energy Physics, Sterile neutrino, Spectrometer, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, business.industry, Detector, Radiation, 01 natural sciences, Semiconductor detector, Optics, Transmission (telecommunications), Coincident, 0103 physical sciences, High Energy Physics::Experiment, 010306 general physics, Absorption (electromagnetic radiation), business, Instrumentation
Abstract

Here we present the specifications of a newly developed beta-spectrometer, based on full absorption Si(Li) detector and thin transmission detector, allowing one to perform efficient separation beta-radiation and accompanying X-rays and gamma radiation. Our method is based on registration of coincident events from both detectors. The spectrometer can be used for precision measurements of various beta-spectra, namely for the beta-spectrum shape study of 144Pr, which is considered to be an advantageous anti-neutrino source for sterile neutrino searches.

Published
2018

14. A Beta Spectrometer Based on Silicon Detectors

Author

E. V. Unzhakov, S. V. Bakhlanov, A. V. Derbin, I. S. Drachnev, N. V. Bazlov, E. A. Chmel, D. A. Semenov, I. M. Kotina, N. V. Pilipenko, V. N. Muratova, and V. K. Eremin

Subjects
Physics, Spectrometer, Silicon, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, business.industry, Detector, chemistry.chemical_element, 01 natural sciences, Spectral line, Optics, medicine.anatomical_structure, chemistry, 0103 physical sciences, medicine, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, business, Neutrino oscillation, Instrumentation, Nucleus, β radiation
Abstract

The characteristics of a beta spectrometer that consists of a total-absorption Si(Li) detector and a drift Si detector are presented. Using this spectrometer, it is possible to efficiently separate β radiation of nuclei from concomitant X and γ rays. The method is based on coincidences between signals from the thick and thin detectors. The spectrometer can be used to precisely measure the shape of the β spectra of various radioactive nuclei, in particular, of the 144Pr nucleus, which is the most promising antineutrino source for searching for neutrino oscillations into a sterile state.

Published
2018

15. Degradation of silicon detectors under long-term irradiation by 252Cf fission products

Author

S V Bakhlanov, A V Derbin, I S Drachnev, O I Konkov, I M Kotina, A M Kuzmichev, I S Lomskaya, M S Mikulich, V N Muratova, N V Niyazova, D A Semenov, M V Trushin, and E V Unzhakov

Subjects
History, Physics::Instrumentation and Detectors, High Energy Physics::Experiment, Nuclear Experiment, Computer Science Applications, Education
Abstract

The response function of the recoil nuclei in detectors designed for detection of neutrinos or dark matter particles can be determined only through usage of a neutron source with a known energy spectrum. A possible solution for a compact neutron calibration source is a combination of a 252Cf neutron source and a semiconductor detector that detects fission fragments, and thus records the neutron emission moment. This work is devoted to the degradation study of the operating parameters for silicon semiconductor detectors irradiated by fission fragments of the nuclide of 252 Cf. Two types of Si detectors were under investigations - silicon-lithium Si(Li) p-i-n detectors and silicon surface barrier detectors. As a result of the measurements, the maximum permissible radiation doses for the correct operation of both types of detectors and the relation of the received radiation dose to the spectroscopic characteristics of the detectors were determined.

Published
2021

16. Influence of α-particles irradiation on the properties and performance of silicon semiconductor detectors

Author

S V Bakhlanov, N V Bazlov, I D Chernobrovkin, A V Derbin, I S Drachnev, I M Kotina, O I Konkov, A M Kuzmichev, M S Mikulich, V N Muratova, M V Trushin, and E V Unzhakov

Subjects
History, Computer Science Applications, Education
Abstract

Deterioration of the operation parameters of p-type Si surface-barrier detector and Si(Li) p-i-n detector upon irradiation by alpha-particles was investigated. The detectors were irradiated at room temperature up to a total number of the registered α-particles Nα equal to 6 × 109. Prolonged irradiation has resulted in a deterioration of the detectors energy resolution ability and it was found that the increase of α-peaks broadening can be described by a linear function of Nα with a slope Δσ/ΔNα ∼ (1.4–1.8) × 10–9 keV/α for both detectors. Resolution deterioration was associated with the increase of the detectors leakage current, which proceeds linearly with the number of absorbed α-particles with the slope ΔI/ΔNα ∼ (7-17) × 10-17 A/α. The increase of the detectors reverse current was related with appearance of radiation-induced defect level at 0.56 eV above the valence band.

Published
2021

17. New measurement of the β-spectrum of 210Bi with a silicon 4πβ-spectrometer

Author

I E Alekseev, S V Bakhlanov, A V Derbin, I S Drachnev, I M Kotina, A M Kuzmichev, I S Lomskaya, M S Mikulich, V N Muratova, N V Niyazova, D A Semenov, M V Trushin, and E V Unzhakov

Subjects
History, Computer Science Applications, Education
Abstract

The shape of 210Bi β-spectrum was measured using a spectrometer based on Si(Li) detectors with a 4π geometry. Full absorption spectrometer allows for a direct measurement of the β-spectra without using the electron backscattering corrections for the response function. The measured value of nuclear shape factor C(W)=1+(-0.4378±0.0072)W+ (0.0526±0.0021) W2 is in agreement with the results of previous studies.

Published
2021

18. A new limit on the resonant absorption of solar axions obtained via 169Tm-containing bolometer

Author

A H Abdelhameed, S V Bakhlanov, P Bauer, A Bento, E Bertoldo, L Canonica, A V Derbin, I S Drachnev, N Ferreiro Iachellini, D Fuchs, D Hauff, A M Kuzmichev, M Laubenstein, D A Lis, I S Lomskaya, M Mancuso, V N Muratova, S Nagorny, S Nisi, F Petricca, F Proebst, J Rothe, V V Ryabchenkov, S E Sarkisov, D A Semenov, K A Subbotin, M V Trushin, E V Unzhakov, and E V Zharikov

Subjects
History, Computer Science Applications, Education
Abstract

A newly developed experimental technique based on 169Tm-containing cryogenic bolometer detector was employed in order to perform the search for solar axions. The inclusion of target material into the active detector volume allowed for significant increase in sensitivity to axion parameters. A short 6.6 days measurement campaign with 8.18 g detector crystal yielded the following limits on axion couplings: | g A γ ( g A N 0 + g A N 3 ) ≤ 1.44 × 10 − 14 GeV − 1 and | g A e ( g A N 0 + g A N 3 ) ≤ 2.81 × 10 − 16 . The achieved results demonstrate high scalability potential of presented experimental approach.

Published
2021

19. Results of Searching for Solar Hadronic Axions Emitted in the M1 Transition in 83Kr Nuclei

Author

S. S. Ratkevich, V. V. Kuzminov, S. P. Yakimenko, V. N. Muratova, D. A. Tekueva, A. Kh. Khokonov, A. V. Derbin, Yu. M. Gavrilyuk, E. V. Unzhakov, I. S. Drachnev, S. I. Panasenko, Z. A. Akhmatov, V. V. Kobychev, V. V. Kazalov, and A. M. Gangapshev

Subjects
Physics, Coupling constant, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Star (game theory), Hadron, Electron, Resonant absorption, 01 natural sciences, 0103 physical sciences, Atomic physics, 010306 general physics, Axion, Energy (signal processing)
Abstract

Axions with the energy of $$9.4$$ keV emitted in the М1 transition in 83Kr nuclei in the Sun have been searched for using the resonant absorption reaction $$A + \,{{\,}^{{83}}}{\kern 1pt} {\text{Kr}} \to \,{{\,}^{{83}}}{\text{K}}{{{\text{r}}}^{ \star }} \to \,{{\,}^{{83}}}{\kern 1pt} {\text{Kr}} + \gamma ,e$$ (9.4 keV). A krypton-filled proportional counter located in a low-background setup is used to detect $$\gamma $$ rays and electrons. A new limit on the axion–nucleon coupling constant $$\left| {g_{{AN}}^{3} - g_{{AN}}^{0}} \right| \leqslant 8.4 \times {{10}^{{ - 7}}}$$ is obtained. In the hadronic axion model, it leads to a new limit on the axion mass $${{m}_{A}} \leqslant 65$$ eV (95% CL). A possibility of searching for solar axions with 57Fe-containing semiconductor crystals is described.

Published
2018

20. Results from Borexino on solar and geo-neutrinos

Author

F. von Feilitzsch, L. Di Noto, J. Martyn, E. Litvinovich, N. Rossi, Xuefeng Ding, Andrey Formozov, I. N. Machulin, I. S. Drachnev, A. Di Ludovico, Matteo Agostini, A. Caminata, Marco Pallavicini, F. Gabriele, Sandra Zavatarelli, A. Porcelli, M. D. Skorokhvatov, Michael Wurm, D. D'Angelo, Andrea Ianni, D. Jeschke, G. Bellini, D. A. Semenov, O. Smirnov, T. Houdy, A. M. Goretti, V. Atroshchenko, V. Orekhov, G. Manuzio, K. Altenmüller, K. Choi, M. Gromov, A. V. Derbin, E. V. Unzhakov, Kai Zuber, Jay Burton Benziger, M. Carlini, S. Davini, D. Franco, Lothar Oberauer, M. S. Meyer, N. Pilipenko, Matthias Laubenstein, M. Nieslony, C. Galbiati, B. Neumair, D. Basilico, J. Maricic, S. Appel, L. Pietrofaccia, Livia Ludhova, R. B. Vogelaar, S. Rottenanger, G. Korga, K. Fomenko, R. Tartaglia, L. Papp, Tobias Lachenmaier, Marco Giammarchi, A. Razeto, Y. Suvorov, Luigi Cappelli, G. Raikov, Z. Bagdasarian, S. Schönert, M. Gschwender, E. Meroni, Fausto Ortica, A. S. Chepurnov, Alessandra Re, Lino Miramonti, F. Cavanna, Gioacchino Ranucci, S. Weinz, D. Guffanti, A. Vishneva, J. Thurn, A. Pocar, G. Bonfini, Paolo Lombardi, Frank Calaprice, B. Caccianiga, S. Marcocci, G. Lukyanchenko, L. Collica, L. Lukyanchenko, Ö. Penek, O. Zaimidoroga, M. M. Wojcik, V. V. Kobychev, Aldo Romani, G. Testera, V. N. Muratova, S. Kumaran, C. Ghiano, D. Bravo, M. Redchuk, P. Cavalcante, M. Misiaszek, S. Caprioli, G. Zuzel, A. Jany, L.F.F. Stokes, E. V. Hungerford, A. Sotnikov, and Aldo Ianni

Subjects
Physics, Physics::Instrumentation and Detectors, Solar spectra, business.industry, Solar neutrino, Detector, Astronomy, Solar energy, Nuclear fusion, High Energy Physics::Experiment, Neutrino, business, Borexino, Solar data
Abstract

Borexino is running at the INFN Gran Sasso National Laboraries, Italy since 2007. Its technical distinctive feature is the unprecedented ultralow background of the inner scintillating core, which is the foundation for the outstanding achievements accumulated by this experiment. In this contribution, after recalling the main features of the detector, the impressive solar data gathered so far by Borexino will be summarized. Special emphasis will be given to the illustration of the recent release of the fluxes as stemming from the simultaneous real time spectroscopy of the neutrinos from the entire $pp$ nuclear fusion chain in the Sun, opening with the remarkable 2.7% accuracy of the ⁷Be flux the era of precision measurements also in the realm of the sub-MeV solar neutrinos. Such results put Borexino in the unique situation of being the only detector able to perform solar neutrino spectroscopy over the entire solar spectrum; the counterpart of this peculiar status, in the flavor conversion interpretation of the solar neutrino data, is the capability of Borexino alone to perform the full validation across the solar energy range of the MSW-LMA paradigm. This contribution will be concluded with an account of the Borexino accomplishments in the geo-neutrino field, marked by the detection of the geo-neutrino signal with a significance as high as $5.9\sigma$.

Published
2019

21. REVIEW ON SOLAR NEUTRINO STUDIES BOREXINO

Author

L. Papp, C. Ghiano, R. Tartaglia, Caren Hagner, A. Pocar, Fausto Ortica, O. Smirnov, L. Lukyanchenko, P. Cavalcante, C. Galbiati, Livia Ludhova, A. S. Chepurnov, M. M. Wojcik, M. Misiaszek, S. Appel, N. Pilipenko, E. V. Unzhakov, G. Bonfini, S. Marcocci, Aldo Romani, E. V. Hungerford, M. Toropova, Frank Calaprice, Lino Miramonti, A. Sotnikov, Aldo Ianni, D. Bick, Sandra Zavatarelli, Andrey Formozov, G. Manuzio, A. Porcelli, Z. Yokley, A. Di Ludovico, Gioacchino Ranucci, K. Altenmüller, M. D. Skorokhvatov, Michael Wurm, Matteo Agostini, A. M. Goretti, G. Testera, L.F.F. Stokes, S. Caprioli, D. A. Semenov, V. Atroshchenko, F. Froborg, D. Bravo, Z. Bagdasarian, J. Thurn, R. Roncin, Denis Korablev, T. Houdy, B. Caccianiga, S. Schönert, Kai Zuber, G. Zuzel, V. N. Muratova, A. Caminata, D. Kryn, Marco Pallavicini, F. Gabriele, K. Choi, M. Gromov, M. Carlini, J. Martyn, S. Weinz, E. Litvinovich, N. Rossi, Lothar Oberauer, D. Franco, A. V. Derbin, S. Davini, B. Neumair, Matthias Laubenstein, A. Jany, L. Di Noto, B. Opitz, G. Korga, G. Lukyanchenko, D. Basilico, K. Fomenko, I. N. Machulin, Xuefeng Ding, F. von Feilitzsch, Marco Giammarchi, F. Lombardi, D. D'Angelo, E. Meroni, A. Razeto, G. Bellini, Y. Suvorov, Andrea Ianni, D. Jeschke, Jay Burton Benziger, I. S. Drachnev, Alessandra Re, O. Zaimidoroga, H. Wang, V. V. Kobychev, R. B. Vogelaar, A. Vishneva, M. S. Meyer, and Paolo Lombardi

Subjects
Physics, Solar neutrino, Astronomy, Borexino
Published
2019

22. Limit on the effective magnetic moment of solar neutrinos using Borexino data

Author

Ö. Penek, K. Altenmüller, D. A. Semenov, Z. Yokley, V. Atroshchenko, R. Tartaglia, G. Testera, T. Houdy, Lothar Oberauer, F. von Feilitzsch, L. Di Noto, G. Bellini, S. Marcocci, I. N. Machulin, M. D. Skorokhvatov, Michael Wurm, M. Toropova, L. Collica, Matthias Laubenstein, V. N. Muratova, S. Rottenanger, E. Meroni, D. Basilico, C. Galbiati, D. D'Angelo, Livia Ludhova, S. Davini, A. S. Chepurnov, A. Caminata, Marco Pallavicini, S. Schönert, M. Gschwender, F. Gabriele, A. V. Derbin, A. Jany, Denis Korablev, R. B. Vogelaar, N. Pilipenko, M. S. Meyer, L.F.F. Stokes, Y. Suvorov, S. Weinz, G. Manuzio, M. Carlini, F. Lombardi, G. Bonfini, E. V. Hungerford, J. Martyn, D. Bick, Sandra Zavatarelli, M. Redchuk, I. Bolognini, Frank Calaprice, E. Litvinovich, Paolo Lombardi, N. Rossi, B. Neumair, A. M. Goretti, A. Sotnikov, Aldo Ianni, A. Porcelli, B. Opitz, A. Razeto, L. Lukyanchenko, D. Franco, G. Korga, K. Fomenko, Xuefeng Ding, J. Thurn, J. Maricic, S. Appel, A. Di Ludovico, Andrey Formozov, O. Zaimidoroga, V. V. Kobychev, Alessandra Re, Matteo Agostini, G. Zuzel, V. Orekhov, L. Papp, B. Caccianiga, Gioacchino Ranucci, Fausto Ortica, D. Guffanti, D. Bravo, Tobias Lachenmaier, Marco Giammarchi, S. Caprioli, I. S. Drachnev, C. Ghiano, Caren Hagner, P. Cavalcante, M. Misiaszek, K. Choi, M. Gromov, M. M. Wojcik, Aldo Romani, Andrea Ianni, D. Jeschke, A. Pocar, O. Smirnov, E. V. Unzhakov, Lino Miramonti, F. Cavanna, A. Vishneva, Kai Zuber, L. Pietrofaccia, G. Lukyanchenko, G. Raikov, Z. Bagdasarian, and Jay Burton Benziger

Subjects
Physics, Particle physics, Electromagnetic interaction, Magnetic moment, Solar neutrino, Limit (mathematics), Borexino
Published
2019

23. Solar neutrino physics with Borexino

Author

M. Gschwender, Matthias Laubenstein, R. Tartaglia, Matteo Agostini, O. Smirnov, S. Marcocci, G. Korga, Lino Miramonti, L. Papp, Y. Suvorov, Z. Bagdasarian, M. D. Skorokhvatov, Michael Wurm, A. V. Derbin, L. Lukyanchenko, Fausto Ortica, E. Meroni, M. Redchuk, G. Bellini, J. Martyn, E. Litvinovich, N. Pilipenko, S. Caprioli, N. Rossi, Andrea Ianni, Sandra Zavatarelli, G. Raikov, A. Pocar, V. Atroshchenko, Tobias Lachenmaier, Xuefeng Ding, G. Bonfini, M. M. Wojcik, D. Franco, Marco Giammarchi, Frank Calaprice, S. Rottenanger, D. Guffanti, Lothar Oberauer, A. Caminata, F. Gabriele, Alessandra Re, Aldo Romani, R. B. Vogelaar, Kai Zuber, L. Di Noto, S. Kumaran, D. Jeschke, A. Di Ludovico, Luigi Cappelli, F. von Feilitzsch, S. Davini, S. Schönert, Aldo Ianni, G. Manuzio, L. Pietrofaccia, V. Orekhov, T. Houdy, J. Maricic, I. N. Machulin, Cristiano Galbiati, Marco Pallavicini, A. Vishneva, D. D'Angelo, Gioacchino Ranucci, K. Altenmüller, A. Porcelli, M. Carlini, S. Appel, J. Thurn, V. N. Muratova, M. Nieslony, C. Ghiano, G. Lukyanchenko, B. Neumair, M. Meyer, Paolo Lombardi, K. Fomenko, K. Choi, F. Cavanna, D. Bravo, L. Collica, B. Caccianiga, P. Cavalcante, O. Zaimidoroga, A. Formozov, D. A. Semenov, M. Misiaszek, L.F.F. Stokes, V. V. Kobychev, Jay Burton Benziger, S. Weinz, E. V. Hungerford, A. Sotnikov, A. Jany, G. Zuzel, I. S. Drachnev, D. Basilico, A. Razeto, M. Gromov, Ö. Penek, G. Testera, E. V. Unzhakov, Livia Ludhova, A. M. Goretti, A. S. Chepurnov, 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), BOREXINO, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)

Subjects
fusion, Physics - Instrumentation and Detectors, neutrino: solar, Physics::Instrumentation and Detectors, QC1-999, Astrophysics::High Energy Astrophysical Phenomena, Solar neutrino, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Nuclear physics, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Nuclear Experiment (nucl-ex), Nuclear Experiment, 010303 astronomy & astrophysics, Borexino, Physics, p p: fusion, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Instrumentation and Detectors (physics.ins-det), Gran Sasso, Automatic Keywords, Physics::Space Physics, Underground laboratory, High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, Neutrino, experimental results
Abstract

We present the most recent solar neutrino results from the Borexino experiment at the Gran Sasso underground laboratory. In particular, refined measurements of all neutrinos produced in the {\it pp} fusion chain have been made. It is the first time that the same detector measures the entire range of solar neutrinos at once. These new data weakly favor a high-metallicity Sun. Prospects for measuring CNO solar neutrinos are also discussed., Proceedings for the 15th International Workshop on Tau Lepton Physics (TAU2018), 24-28 September 2018, Amsterdam, The Netherlands. arXiv admin note: substantial text overlap with arXiv:1812.02326

Published
2019

24. A Test of Bolometric Properties of Tm-containing Crystals as a Perspective Detector for the Solar Axion Search

Author

V. N. Muratova, E. V. Unzhakov, S. E. Sarkisov, A. V. Derbin, Denis A. Lis, Matthias Laubenstein, Evgeny V Zharikov, V. V. Ryabchenkov, Stefano Nisi, D. A. Semenov, E. Bertoldo, Kirill A. Subbotin, M. Mancuso, S.S. Nagorny, I. S. Drachnev, and F. Petricca

Subjects
Nuclear and High Energy Physics, Physics - Instrumentation and Detectors, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Dark matter, FOS: Physical sciences, 01 natural sciences, High Energy Physics - Experiment, law.invention, Crystal, High Energy Physics - Experiment (hep-ex), Perspective (geometry), High Energy Physics - Phenomenology (hep-ph), law, 0103 physical sciences, Nuclide, 010306 general physics, Instrumentation, Axion, Physics, 010308 nuclear & particles physics, Detector, Bolometer, Instrumentation and Detectors (physics.ins-det), Computational physics, High Energy Physics - Phenomenology, Ground state, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

The $^{169}$Tm nuclide has first nuclear level at 8.41 keV with magnetic type transition to the ground state and, therefore, can be used as a target nucleus for the search of resonant absorption of solar axions. We plan to use a Tm-containing crystal of a garnet family Tm$_3$Al$_5$O$_{12}$ as a bolometric detector in order to search for the excitation of the first nuclear level of $^{169}$Tm via the resonant absorption of solar axions. With this perspective in mind, a sample of the Tm$_3$Al$_5$O$_{12}$ crystal was grown and tested for its bolometric and optical properties. Measurements of chemical and/or radioactive contaminations were performed as well. In this paper we present the test results and estimate the requirements for a future low-background experimental setup., Comment: 9 pages, 6 figures, 3 tables

Published
2019
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25. Results on geoneutrinos at Borexino

Author

Al. Ianni, G. Bonfini, Frank Calaprice, Andrey Formozov, Z. Yokley, V. Atroshchenko, J. Martyn, E. Litvinovich, R. Tartaglia, C. Galbiati, Livia Ludhova, L. Di Noto, N. Rossi, J. Thurn, A. Di Ludovico, G. Raikov, Z. Bagdasarian, Matteo Agostini, D. A. Semenov, A. S. Chepurnov, V. Orekhov, I. N. Machulin, Lothar Oberauer, F. von Feilitzsch, G. Bellini, D. Opitz, C. Ghiano, Caren Hagner, Matthias Laubenstein, A. Caminata, T. Houdy, Xuefeng Ding, M. M. Wojcik, Marco Pallavicini, F. Gabriele, A. M. Goretti, Aldo Romani, M. Carlini, Denis Korablev, P. Cavalcante, G. Manuzio, M. Misiaszek, B. Neumair, R. B. Vogelaar, G. Korga, K. Fomenko, N. Pilipenko, S. Rottenanger, L. Papp, G. Zuzel, M. S. Meyer, A. Pocar, D. Basilico, E. Meroni, E. V. Hungerford, Ö. Penek, Fausto Ortica, M. D. Skorokhvatov, Michael Wurm, J. Maricic, A. V. Derbin, S. Appel, M. Gschwender, K. Altenmüller, D. Guffanti, O. Smirnov, I. Bolognino, G. Lukyanchenko, A. Sotnikov, E. V. Unzhakov, G. Testera, Paolo Lombardi, Tobias Lachenmaier, Alessandra Re, S. Schönert, Marco Giammarchi, O. Zaimidoroga, F. Lombardi, S. Caprioli, V. V. Kobychev, V. N. Muratova, S. Marcocci, M. Toropova, L. Collica, Jay Burton Benziger, A. Jany, D. Bick, Sandra Zavatarelli, A. Porcelli, S. Weinz, Gioacchino Ranucci, Y. Suvorov, B. Caccianiga, A. Vishneva, S. Davini, L. Lukyanchenko, D. Bravo, Lino Miramonti, F. Cavanna, L.F.F. Stokes, D. Jeschke, An. Ianni, Kai Zuber, L. Pietrofaccia, M. Redchuk, D. Franco, A. Razeto, K. Choi, M. Gromov, and I. S. Drachnev

Subjects
Physics, Nuclear physics, Low energy, Physics::Instrumentation and Detectors, Solar neutrino, Detector, High Energy Physics::Experiment, Scintillator, National laboratory, Borexino, Physics::Geophysics
Abstract

The latest and more complete geo-neutrinos Borexino results, are briefly presented and discussed. Borexino is a liquid scintillator detector located at the Gran Sasso National Laboratory in Italy, whose primary purpose is the real-time spectroscopy of low energy solar neutrinos. It is the only experiment so far to have provided an evidence of geo-neutrinos existence beyond a 5σ significance level. The geo-neutrinos measurement and analysis, along with implications from the geological point of view, are shortly discussed.

Published
2018

26. Search for hadronic solar axions

Author

S. S. Ratkevich, V. N. Muratova, I. S. Drachnev, S. I. Panasenko, S. S. Berezin, V. V. Kuzminov, A. M. Gangapshev, Yu. M. Gavrilyuk, Z. A. Akhmatov, A. Yu. Zavrazhnov, A. V. Derbin, E. V. Unzhakov, V. V. Kazalov, A. Kh. Khokonov, V. V. Kobychev, and D. A. Tekueva

Subjects
Physics, History, Thesaurus (information retrieval), Information retrieval, Axion, Computer Science Applications, Education
Abstract

Resonance excitation of the 83Kr first nuclear level (E = 9.4 keV) by solar axions formed via the Primakoff mechanism and via an M1-transition in the 83Kr nucleus in the Sun is searched. The γ-and x-ray photons and the conversion and Auger electrons arising from the excited-level relaxation are detected with a proportional counter in the underground low-background facility of Baksan Neutrino Observatory. The following experimental constraint is obtained for the product of the axion-photon coupling constant and the axion mass: |g Aγ m A | ≼ 6.16 × 10−17. In the framework of the hadronic-axion model, this corresponds to a new axion-mass constraint of mA ≼ 12.6 eV at 95% coincidence level (C.L.). In case of pure hadronic interaction the upper limit for axion-nucleon coupling is | g AN 3 − g AN 0 | ≼ 8.3 × 10−7 at 95% C.L., which corresponds to upper limit for hadrionic axion mass: mA ≼ 64 eV at 95% C.L. with the generally accepted values S = 0.5 and z = 0.56.

Published
2021

27. Photoelectric properties of MIS structures on high-resistivity p-type silicon with aluminium nitride tunnelling insulator

Author

I. M. Kotina, M. S. Lasakov, N. V. Bazlov, I. S. Drachnev, M. V. Trushin, A. M. Danishevskii, E. V. Unzhakov, A. V. Derbin, A. M. Kuzmichev, and O. I. Konkov

Subjects
History, Materials science, business.industry, Aluminium nitride, Insulator (electricity), P type silicon, Photoelectric effect, Computer Science Applications, Education, chemistry.chemical_compound, High resistivity, chemistry, Optoelectronics, business, Quantum tunnelling
Abstract

Photoelectric properties of MIS tunnel diodes produced on high-resistive p-type silicon wafers with thin aluminium nitride AlN insulator layer and Pd or Al metal gate electrodes were investigated. It was found that synthesized AlN films possess a fixed positive charge, which leads to the creation of near-surface inversion layer in silicon substrate. The ratio of the photocurrent to the dark current K = Iph / Idark (on / off ratio) was found to depend on the gate electrode material, illumination intensity and the applied reverse bias. For studied MIS structures K ratio varied from 10 4 to 10 5 and was two orders of magnitude higher than that for the control MS structure without the insulator layer. High on / off ratio of such MIS structures with AlN tunnelling insulator promotes their application as an effective photodetectors in optoelectronics.

Published
2020

28. A measurement method of a detector response function for monochromatic electrons based on the Compton scattering

Author

N. V. Bazlov, V. N. Muratova, E. V. Unzhakov, A. V. Derbin, A.S. Kayunov, D. A. Semenov, S. V. Bakhlanov, and I. S. Drachnev

Subjects
Nuclear and High Energy Physics, Physics - Instrumentation and Detectors, Photon, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Scintillator, 01 natural sciences, High Energy Physics - Experiment, 010305 fluids & plasmas, High Energy Physics - Experiment (hep-ex), Optics, 0103 physical sciences, Gamma spectroscopy, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, Instrumentation, Physics, Scintillation, business.industry, Detector, Compton scattering, Gamma ray, Instrumentation and Detectors (physics.ins-det), Scintillation counter, High Energy Physics::Experiment, business
Abstract

In this paper we present a method of scintillation detector energy calibration using the gamma-rays. The technique is based on the Compton scattering of gamma-rays in a scintillation detector and subsequent photoelectric absorption of the scattered photon in the Ge-detector. The novelty of this method is that the source of gamma rays, the germanium and scintillation detectors are immediately arranged adjacent to each other. The method presents an effective solution for the detectors consisting of a low atomic number materials, when the ratio between Compton effect and photoelectric absorption is large and the mean path of gamma-rays is comparable to the size of the detector. The technique can be used for the precision measurements of the scintillator light yield dependence on the electron energy., 4 pages, 5 figures

Published
2016

29. A method for measuring the detector response function for monochromatic electrons based on Compton scattering

Author

A. S. Kayunov, E. V. Unzhakov, A. V. Derbin, D. A. Semenov, V. N. Muratova, S. V. Bakhlanov, and I. S. Drachnev

Subjects
Physics, Scintillation, Photon, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, business.industry, Astrophysics::High Energy Astrophysical Phenomena, Detector, Attenuation length, Compton scattering, Electron, Scintillator, 01 natural sciences, Optics, 0103 physical sciences, High Energy Physics::Experiment, Monochromatic color, 010306 general physics, business, Instrumentation
Abstract

A method for calibrating the energy scale of a scintillation detector using γ rays has been proposed and implemented. The technique is based on Compton scattering in the scintillation detector, followed by photoelectric absorption of a scattered γ-ray photon in a Ge detector. The novelty of the method consists in placing the γ-ray source and the scintillation and Ge detectors tightly to each other. The method is efficient for detectors with a low-Z material for which the ratio of the cross sections for Compton scattering and photoeffect is great in value and the attenuation length of the γ-ray flux is comparable to the detector dimensions. The described technique can be used to precisely investigate the dependence of the light yield in a scintillator on the electron energy.

Published
2016

30. Solar Neutrinos Spectroscopy with Borexino Phase-II

Author

A. Di Ludovico, G. Manuzio, L. Lukyanchenko, Matthias Laubenstein, J. Maricic, S. Appel, M. Redchuk, S. Caprioli, E. Meroni, N. Pilipenko, C. Ghiano, Caren Hagner, J. Martyn, E. Litvinovich, Z. Yokley, G. Zuzel, P. Cavalcante, N. Rossi, G. Bonfini, V. Atroshchenko, B. Caccianiga, M. S. Meyer, M. Misiaszek, Frank Calaprice, Tobias Lachenmaier, Marco Giammarchi, Xuefeng Ding, D. A. Semenov, O. Smirnov, A. M. Goretti, Paolo Lombardi, A. Jany, Alessandra Re, T. Houdy, Matteo Agostini, E. V. Hungerford, S. Davini, E. V. Unzhakov, O. Zaimidoroga, V. V. Kobychev, A. Sotnikov, K. Altenmueller, R. B. Vogelaar, D. Franco, S. Weinz, I. N. Machulin, A. Vishneva, Aldo Ianni, F. Cavanna, A. Pocar, Y. Suvorov, G. Lukyanchenko, Jay Burton Benziger, G. Raikov, Z. Bagdasarian, R. Tartaglia, S. Rottenanger, M. Carlini, G. Korga, K. Fomenko, L. Papp, S. Schönert, S. Marcocci, M. Toropova, L. Collica, D. Jeschke, A. Caminata, F. Gabriele, D. Guffanti, M. D. Skorokhvatov, Denis Korablev, Andrey Formozov, Michael Wurm, A. V. Derbin, M. M. Wojcik, Andrea Ianni, D. Bick, Sandra Zavatarelli, F. von Feilitzsch, A. Porcelli, I. Bolognino, Aldo Romani, M. Gschwender, L. Di Noto, C. Galbiati, Lino Miramonti, Livia Ludhova, A. S. Chepurnov, Ö. Penek, G. Testera, J. Thurn, G. Bellini, Gioacchino Ranucci, L.F.F. Stokes, D. Bravo, D. Basilico, F. Lombardi, A. Razeto, K. Choi, M. Gromov, I. S. Drachnev, Kai Zuber, and L. Pietrofaccia

Subjects
Physics, Nuclear physics, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Solar neutrino, particle_field_physics, Phase (waves), High Energy Physics::Experiment, Neutrino oscillation, Spectroscopy, Borexino
Abstract

Solar neutrinos have played a central role in the discovery of the neutrino oscillation mechanism. They still are proving to be a unique tool to help investigate the fusion reactions that power stars and further probe basic neutrino properties. The Borexino neutrino observatory has been operationally acquiring data at Laboratori Nazionali del Gran Sasso in Italy since 2007. Its main goal is the real-time study of low energy neutrinos (solar or originated elsewhere, such as geo-neutrinos). The latest analysis of experimental data, taken during the so-called Borexino Phase-II (2011-present), will be showcased in this talk - yielding new high-precision, simultaneous wide band flux measurements of the four main solar neutrino components belonging to the "pp" fusion chain (pp, pep, 7Be, 8B), as well as upper limits on the remaining two solar neutrino fluxes (CNO and hep).

Published
2018

31. Comprehensive measurement of pp-chain solar neutrinos

Author

J. Martyn, E. Litvinovich, N. Rossi, B. Opitz, G. Lukyanchenko, Xuefeng Ding, O. Smirnov, A. Di Ludovico, M. Redchuk, Aldo Ianni, Z. Yokley, D. Jeschke, G. Manuzio, D. Kryn, Marcin Wójcik, V. Atroshchenko, A. Pocar, G. Raikov, M. D. Skorokhvatov, A. V. Derbin, Ö. Penek, Z. Bagdasarian, Matteo Agostini, P. Cavalcante, H. ang, K. Fomenko, F.L. Villante, Lothar Oberauer, Michael Wurm, S. Caprioli, D. A. Semenov, O. Zaimidoroga, Matthias Laubenstein, G. Bonfini, Y. Suvorov, A. Caminata, L. Lukyanchenko, V. V. Kobychev, A. Vishneva, Lino Miramonti, T. Houdy, E. V. Unzhakov, I. N. Machulin, J. Thurn, K. Choi, R. Roncin, M. Gromov, V. N. Muratova, Gioacchino Ranucci, E. Meroni, Marco Giammarchi, S. Schönert, A. Razeto, N. Pilipenko, Marco Pallavicini, S. Weinz, D. D'Angelo, G. Bellini, D. Franco, C. Ghiano, S. Marcocci, Caren Hagner, R. Tartaglia, M. Toropova, L. Collica, M. S. Meyer, G. Testera, Cristiano Galbiati, L.F.F. Stokes, F. Gabriele, K. Altenmüller, D. Bravo, Aldo Romani, S. Appel, L. Di Noto, M. Misiaszek, S. Davini, D. Basilico, Andrea Ianni, D. Bick, Sandra Zavatarelli, Paolo Lombardi, A. Porcelli, G. Korga, B. Caccianiga, F. Lombardi, Kai Zuber, I. S. Drachnev, A. Jany, E. V. Hungerford, A. Sotnikov, Jay Burton Benziger, Alessandra Re, G. Zuzel, R. B. Vogelaar, M. Carlini, B. Neumair, L. Papp, Fausto Ortica, D. Korablev, D. Guffanti, Andrey Formozov, F. von Feilitzsch, V. Orekhov, Frank Calaprice, Livia Ludhova, A. M. Goretti, A. S. Chepurnov, 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), BOREXINO, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), Agostini, M., Altenmüller, K., Appel, S., Atroshchenko, V., Bagdasarian, Z., Basilico, D., Bellini, G., Benziger, J., Bick, D., Bonfini, G., Bravo, D., Caccianiga, B., Calaprice, F., Caminata, A., Caprioli, S., Carlini, M., Cavalcante, P., Chepurnov, A., Choi, K., Collica, L., D’Angelo, D., Davini, S., Derbin, A., Ding, X. F., Di ludovico, A., Di noto, L., Drachnev, I., Fomenko, K., Formozov, A., Franco, D., Gabriele, F., Galbiati, C., Ghiano, C., Giammarchi, M., Goretti, A., Gromov, M., Guffanti, D., Hagner, C., Houdy, T., Hungerford, E., Ianni, Aldo, Ianni, Andrea, Jany, A., Jeschke, D., Kobychev, V., Korablev, D., Korga, G., Kryn, D., Laubenstein, M., Litvinovich, E., Lombardi, F., Lombardi, P., Ludhova, L., Lukyanchenko, G., Lukyanchenko, L., Machulin, I., Manuzio, G., Marcocci, S., Martyn, J., Meroni, E., Meyer, M., Miramonti, L., Misiaszek, M., Muratova, V., Neumair, B., Oberauer, L., Opitz, B., Orekhov, V., Ortica, F., Pallavicini, M., Papp, L., Penek, Ã ., Pilipenko, N., Pocar, A., Porcelli, A., Raikov, G., Ranucci, G., Razeto, A., Re, A., Redchuk, M., Romani, A., Roncin, R., Rossi, N., Schönert, S., Semenov, D., Skorokhvatov, M., Smirnov, O., Sotnikov, A., Stokes, L. F. F., Suvorov, Y., Tartaglia, R., Testera, G., Thurn, J., Toropova, M., Unzhakov, E., Villante, F. L., Vishneva, A., Vogelaar, R. B., von Feilitzsch, F., Wang, H., Weinz, S., Wojcik, M., Wurm, M., Yokley, Z., Zaimidoroga, O., Zavatarelli, S., Zuber, K., Zuzel, G., Agostini, M, Altenmuller, K, Appel, S, Atroshchenko, V, Bagdasarian, Z, Basilico, D, Bellini, G, Benziger, J, Bick, D, Bonfini, G, Bravo, D, Caccianiga, B, Calaprice, F, Caminata, A, Caprioli, S, Carlini, M, Cavalcante, P, Chepurnov, A, Choi, K, Collica, L, D'Angelo, D, Davini, S, Derbin, A, Ding, X, Diludovico, A, Dinoto, L, Drachnev, I, Fomenko, K, Formozov, A, Franco, D, Gabriele, F, Galbiati, C, Ghiano, C, Giammarchi, M, Goretti, A, Gromov, M, Guffanti, D, Hagner, C, Houdy, T, Hungerford, E, Ianni, A, Jany, A, Jeschke, D, Kobychev, V, Korablev, D, Korga, G, Kryn, D, Laubenstein, M, Litvinovich, E, Lombardi, F, Lombardi, P, Ludhova, L, Lukyanchenko, G, Lukyanchenko, L, Machulin, I, Manuzio, G, Marcocci, S, Martyn, J, Meroni, E, Meyer, M, Miramonti, L, Misiaszek, M, Muratova, V, Neumair, B, Oberauer, L, Opitz, B, Orekhov, V, Ortica, F, Pallavicini, M, Papp, L, Penek, O, Pilipenko, N, Pocar, A, Porcelli, A, Raikov, G, Ranucci, G, Razeto, A, Re, A, Redchuk, M, Romani, A, Roncin, R, Rossi, N, Schonert, S, Semenov, D, Skorokhvatov, M, Smirnov, O, Sotnikov, A, Stokes, L, Suvorov, Y, Tartaglia, R, Testera, G, Thurn, J, Toropova, M, Unzhakov, E, Villante, F, Vishneva, A, Vogelaar, R, von Feilitzsch, F, Wang, H, Weinz, S, Wojcik, M, Wurm, M, Yokley, Z, Zaimidoroga, O, Zavatarelli, S, Zuber, K, Zuzel, G, 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
Nuclear reaction, electron, neutrino: solar, Solar neutrino, Electron, 01 natural sciences, 7. Clean energy, nuclear reaction, neutrino: flux, energy: threshold, energy: solar, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Nuclear Experiment, 010303 astronomy & astrophysics, Borexino, Physics, Proton–proton chain reaction, Multidisciplinary, S067SES, S067B7T, semileptonic decay, neutrino electron: elastic scattering, Neutrino, model: solar, chemistry.chemical_element, helium, neutrino: beam, S067SBT, Nuclear physics, S067CNT, 0103 physical sciences, S067HPT, surface, Helium, S067PPT, Liquid Scintillator, pp-chain, p p: fusion, 010308 nuclear & particles physics, business.industry, temperature, Detector, S067PET, Solar energy, Gran Sasso, chemistry, hydrogen, High Energy Physics::Experiment, business, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], experimental results
Abstract

International audience; About 99 per cent of solar energy is produced through sequences of nuclear reactions that convert hydrogen into helium, starting from the fusion of two protons (the pp chain). The neutrinos emitted by five of these reactions represent a unique probe of the Sun’s internal working and, at the same time, offer an intense natural neutrino beam for fundamental physics. Here we report a complete study of the pp chain. We measure the neutrino–electron elastic-scattering rates for neutrinos produced by four reactions of the chain: the initial proton–proton fusion, the electron-capture decay of beryllium-7, the three-body proton–electron–proton (pep) fusion, here measured with the highest precision so far achieved, and the boron-8 beta decay, measured with the lowest energy threshold. We also set a limit on the neutrino flux produced by the$^{3}$He–proton fusion (hep). These measurements provide a direct determination of the relative intensity of the two primary terminations of the pp chain (pp-I and pp-II) and an indication that the temperature profile in the Sun is more compatible with solar models that assume high surface metallicity. We also determine the survival probability of solar electron neutrinos at different energies, thus probing simultaneously and with high precision the neutrino flavour-conversion paradigm, both in vacuum and in matter-dominated regimes.

Published
2018

32. Search for the resonance absorption of solar axions emitted in the M1 transition of 83Kr and 57Fe nuclei in the Sun

Author

A. Yu. Zavrazhnov, Z. A. Akhmatov, I. S. Drachnev, E. V. Unzhakov, A. M. Gangapshev, A. V. Derbin, V. V. Kuzminov, Yu. M. Gavrilyuk, V. Kazalov, V. N. Muratova, D. A. Tekueva, S. P. Yakimenko, S. S. Berezin, S. I. Panasenko, S. S. Ratkevich, and A. Kh. Khokonov

Subjects
Nuclear physics, Physics, Standard solar model, chemistry, Krypton, chemistry.chemical_element, Proportional counter, Resonant absorption, Axion
Published
2018

33. New experiment on search for the resonance absorption of solar axion emitted in the M1 transition of 83Kr nuclei

Author

V. V. Kazalov, V. V. Kobychev, D. A. Tekueva, V. V. Kuzminov, A. V. Derbin, I. S. Drachnev, E. V. Unzhakov, S. I. Panasenko, Yu. M. Gavrilyuk, A. N. Gangapshev, V. N. Muratova, S. S. Ratkevich, D. A. Semenov, and S. P. Yakimenko

Subjects
Physics, Physics and Astronomy (miscellaneous), Isovector, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Isoscalar, Nuclear Theory, Hadron, Krypton, chemistry.chemical_element, Electron, Nuclear physics, chemistry, High Energy Physics::Experiment, Neutrino, Nuclear Experiment, Nucleon, Axion
Abstract

Axions with an energy of 9.4 keV emitted in the M1 transition of 83Kr nuclei in the Sun have been sought in the resonance absorption reaction A + 83Kr → 83Kr* → 83Kr + γ, e (9.4 keV). A proportional gas chamber filled with krypton and placed in a low-background setup at the underground laboratory of the Baksan neutrino observatory was used to detect γ-ray photons and electrons appearing after the decay of a nuclear level. As a result, a new constraint has been determined on the isoscalar and isovector coupling constants of the axion with nucleons: |gAN3– gAN0| ≤ 1.29 × 10–6. This constraint results in the following new bound on the mass of the axion in the hadronic axion model: mA ≤ 100 eV (95% C.L.).

Published
2015

34. Limiting neutrino magnetic moments with Borexino Phase-II solar neutrino data

Author

Y. Suvorov, S. Davini, R. B. Vogelaar, J. Martyn, E. Litvinovich, I. N. Machulin, Matthias Laubenstein, N. Rossi, M. Carlini, D. A. Semenov, Marco Pallavicini, L. Lukyanchenko, M. D. Skorokhvatov, S. Caprioli, B. Opitz, D. D'Angelo, O. Zaimidoroga, H. Wang, Aldo Ianni, Michael Wurm, Z. Bagdasarian, Kai Zuber, S. Weinz, Xuefeng Ding, B. Neumair, T. Houdy, G. Korga, S. Appel, F. Froborg, K. Fomenko, L. Papp, G. Lukyanchenko, E. Meroni, V. V. Kobychev, C. Ghiano, G. Bellini, A. M. Goretti, Fausto Ortica, Caren Hagner, Z. Yokley, D. Guffanti, V. Atroshchenko, M. Redchuk, Aldo Romani, L.F.F. Stokes, I. S. Drachnev, Matteo Agostini, Marcin Wójcik, Andrey Formozov, N. Pilipenko, D. Franco, P. Cavalcante, D. Kryn, A. Di Ludovico, L. Di Noto, Jay Burton Benziger, Alessandra Re, G. Manuzio, M. S. Meyer, M. Misiaszek, F. von Feilitzsch, A. Vishneva, Lothar Oberauer, O. Smirnov, V. Orekhov, V. N. Muratova, B. Caccianiga, E. V. Unzhakov, D. Bravo, Paolo Lombardi, K. Choi, Lino Miramonti, M. Gromov, A. Pocar, D. Jeschke, D. Basilico, G. Bonfini, F. Lombardi, A. V. Derbin, A. Razeto, J. Thurn, R. Tartaglia, R. Roncin, Frank Calaprice, Marco Giammarchi, Ö. Penek, G. Testera, C. Galbiati, Livia Ludhova, A. S. Chepurnov, Denis Korablev, E. V. Hungerford, A. Sotnikov, S. Schönert, Andrea Ianni, D. Bick, Sandra Zavatarelli, A. Porcelli, Gioacchino Ranucci, A. Caminata, G. Zuzel, F. Gabriele, A. Jany, K. Altenmüller, S. Marcocci, M. Toropova, L. Collica, Agostini, M, Altenmuller, K, Appel, S, Atroshchenko, V, Bagdasarian, Z, Basilico, D, Bellini, G, Benziger, J, Bick, D, Bonfini, G, Bravo, D, Caccianiga, B, Calaprice, F, Caminata, A, Caprioli, S, Carlini, M, Cavalcante, P, Chepurnov, A, Choi, K, Collica, L, D'Angelo, D, Davini, S, Derbin, A, Ding, X, Di Ludovico, A, Di Noto, L, Drachnev, I, Fomenko, K, Formozov, A, Franco, D, Froborg, F, Gabriele, F, Galbiati, C, Ghiano, C, Giammarchi, M, Goretti, A, Gromov, M, Guffanti, D, Hagner, C, Houdy, T, Hungerford, E, Ianni, A, Jany, A, Jeschke, D, Kobychev, V, Korablev, D, Korga, G, Kryn, D, Laubenstein, M, Litvinovich, E, Lombardi, F, Lombardi, P, Ludhova, L, Lukyanchenko, G, Lukyanchenko, L, Machulin, I, Manuzio, G, Marcocci, S, Martyn, J, Meroni, E, Meyer, M, Miramonti, L, Misiaszek, M, Muratova, V, Neumair, B, Oberauer, L, Opitz, B, Orekhov, V, Ortica, F, Pallavicini, M, Papp, L, Penek, O, Pilipenko, N, Pocar, A, Porcelli, A, Ranucci, G, Razeto, A, Re, A, Redchuk, M, Romani, A, Roncin, R, Rossi, N, Schonert, S, Semenov, D, Skorokhvatov, M, Smirnov, O, Sotnikov, A, Stokes, L, Suvorov, Y, Tartaglia, R, Testera, G, Thurn, J, Toropova, M, Unzhakov, E, Vishneva, A, Vogelaar, R, Von Feilitzsch, F, Wang, H, Weinz, S, Wojcik, M, Wurm, M, Yokley, Z, Zaimidoroga, O, Zavatarelli, S, Zuber, K, 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), Borexino, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), Agostini, M., Altenmueller, K., Appel, S., Atroshchenko, V., Bagdasarian, Z., Basilico, D., Bellini, G., Benziger, J., Bick, D., Bonfini, G., Bravo, D., Caccianiga, B., Calaprice, F., Caminata, A., Caprioli, S., Carlini, M., Cavalcante, P., Chepurnov, A., Choi, K., Collica, L., D'Angelo, D., Davini, S., Derbin, A., Ding, X. F., Di Ludovico, A., Di Noto, L., Drachnev, I., Fomenko, K., Formozov, A., Franco, D., Froborg, F., Gabriele, F., Galbiati, C., Ghiano, C., Giammarchi, M., Goretti, A., Gromov, M., Guffanti, D., Hagner, C., Houdy, T., Hungerford, E., Ianni, Aldo, Ianni, Andrea, Jany, A., Jeschke, D., Kobychev, V., Korablev, D., Korga, G., Kryn, D., Laubenstein, M., Litvinovich, E., Lombardi, F., Lombardi, P., Ludhova, L., Lukyanchenko, G., Lukyanchenko, L., Machulin, I., Manuzio, G., Marcocci, S., Martyn, J., Meroni, E., Meyer, M., Miramonti, L., Misiaszek, M., Muratova, V., Neumair, B., Oberauer, L., Opitz, B., Orekhov, V., Ortica, F., Pallavicini, M., Papp, L., Penek, O., Pilipenko, N., Pocar, A., Porcelli, A., Ranucci, G., Razeto, A., Re, A., Redchuk, M., Romani, A., Roncin, R., Rossi, N., Schoenert, S., Semenov, D., Skorokhvatov, M., Smirnov, O., Sotnikov, A., Stokes, L. F. F., Suvorov, Y., Tartaglia, R., Testera, G., Thurn, J., Toropova, M., Unzhakov, E., Vishneva, A., Vogelaar, R. B., von Feilitzsch, F., Wang, H., Weinz, S., Wojcik, M., Wurm, M., Yokley, Z., Zaimidoroga, O., Zavatarelli, S., Zuber, K., Zuzel, G., AstroParticule et Cosmologie ( APC - UMR 7164 ), and Centre National de la Recherche Scientifique ( CNRS ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Observatoire de Paris-Université Paris Diderot - Paris 7 ( UPD7 ) -Commissariat à l'énergie atomique et aux énergies alternatives ( CEA )

Subjects
Physics and Astronomy (miscellaneous), neutrino: solar, Physics::Instrumentation and Detectors, Solar neutrino, 01 natural sciences, High Energy Physics - Experiment, Neutrino detector, High Energy Physics - Experiment (hep-ex), SPIN ROTATION, High Energy Physics - Phenomenology (hep-ph), electron: recoil, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Astrophysics::Solar and Stellar Astrophysics, Borexino, S066MGM, gallium, Physics, Magnetic moment, neutrino: magnetic moment, High Energy Physics - Phenomenology, neutrino: moment, neutrino: flavor, neutrino: Majorana, Measurements of neutrino speed, Neutrino, upper limit, Particle physics, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, DECAYS, Nuclear physics, statistical analysis, [ PHYS.HEXP ] Physics [physics]/High Energy Physics - Experiment [hep-ex], 0103 physical sciences, ddc:530, 010306 general physics, Neutrino oscillation, DETECTOR, ELECTROMAGNETIC PROPERTIES, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Solar neutrino problem, MAJORANA NEUTRINOS, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], electron: energy spectrum, [ PHYS.HPHE ] Physics [physics]/High Energy Physics - Phenomenology [hep-ph], High Energy Physics::Experiment, experimental results
Abstract

A search for the solar neutrino effective magnetic moment has been performed using data from 1291.5 days exposure during the second phase of the Borexino experiment. No significant deviations from the expected shape of the electron recoil spectrum from solar neutrinos have been found, and a new upper limit on the effective neutrino magnetic moment of $\mu_{\nu}^{eff}$ $, Comment: 7 pages, 2 figures

Published
2017

35. Si(Li) detector with ultra-thin entrance window on the diffusive lithium side

Author

O. I. Konkov, N. V. Bazlov, S. N. Abolmasov, E. V. Unzhakov, A. V. Derbin, E. I. Terukov, I. S. Drachnev, I. M. Kotina, N. V. Pilipenko, G. E. Gicharevich, and E. A. Chmel

Subjects
History, Materials science, chemistry, business.industry, Detector, Optoelectronics, chemistry.chemical_element, Window (computing), Lithium, business, Computer Science Applications, Education
Abstract

Present work reports the results of activities intended to reach thin Si(Li) detector entrance window on the diffusive lithium layer side. It was established that the new n-contact represented by a heterostructure of unalloyed amorphous n-type silicon a-Si:H allows one to achieve the entrance window thickness 3 – 4 orders of magnitude smaller than the lithium-side entrance window of standard Si(Li) detectors. The films of amorphous silicon were synthesized with MASD (magnetron assisted silane decomposition) method in mixture of SiH4 (25%) and Ar (75%) gases. Lithium layer surface resistivity and silicon target type (n- or p-) affection on electrical properties of Si(Li) detector contact produced were studied. The investigation performed had led to a technology of Si(Li) detector production with thickness of the entrance window on the diffusive lithium layer side below 0.1 µm.

Published
2019

36. A Silicon Detector Based Beta-spectrometer

Author

N. V. Pilipenko, I. S. Drachnev, S. V. Bakhlanov, N. V. Bazlov, E. A. Chmel, D. A. Semenov, V.K. Yeremin, E. V. Unzhakov, I. E. Alekseev, V N Muratova, I. M. Kotina, and A. V. Derbin

Subjects
History, Sterile neutrino, Materials science, Spectrometer, Silicon, Physics::Instrumentation and Detectors, business.industry, High Energy Physics::Phenomenology, Detector, chemistry.chemical_element, Computer Science Applications, Education, Optics, chemistry, Beta (plasma physics), Silicon detector, High Energy Physics::Experiment, Nuclide, business, Absorption (electromagnetic radiation)
Abstract

Here we present the specifications of the newly developed beta-spectrometer based on thick full absorption Si(Li) detector. The spectrometer was designed for precision measurements of various beta-spectra, namely for the beta-spectrum shape study of 144Pr, which is considered to be one of the most promising anti-neutrino source for sterile neutrino searches.

Published
2017

37. A test of electric charge conservation with Borexino

Author

E. V. Hungerford, M. Kaiser, A. Empl, A. Sotnikov, A. Pocar, G. Lukyanchenko, M. Obolensky, F. Lombardi, Jay Burton Benziger, P. J. Mosteiro, K. Jedrzejczak, D. Kryn, Hui Wang, Marcin Wójcik, Matteo Agostini, M. Goeger-Neff, Alessandra Re, Aldo Romani, B. Lehnert, J. Winter, V. N. Muratova, L. Di Noto, A. Razeto, Michael Meyer, L. Perasso, D. Franco, M. Montuschi, S. Weinz, O. Smirnov, S. V. Sukhotin, A.V. Etenko, A. Caminata, I. N. Machulin, O. Zaimidoroga, E. V. Unzhakov, D. Bravo, A. V. Derbin, M. Gromov, G. Zuzel, Aldo Ianni, Kai Zuber, V. V. Kobychev, Y. Suvorov, D. A. Semenov, Livia Ludhova, Marco Pallavicini, D. D'Angelo, J. Thurn, Andrea Ianni, D. Bick, Sandra Zavatarelli, A. M. Goretti, A. S. Chepurnov, G. Testera, Cristiano Galbiati, Gioacchino Ranucci, I. S. Drachnev, S. Appel, R. B. Vogelaar, Paolo Lombardi, Marco Giammarchi, S. Davini, G. Korga, B. Caccianiga, S. Schönert, K. Fomenko, Z. Yokley, Lothar Oberauer, Matthias Laubenstein, S. Manecki, M. D. Skorokhvatov, Michael Wurm, E. Meroni, A. Vishneva, G. Bellini, S. Marcocci, M. Toropova, Lino Miramonti, R. Tartaglia, W. Maneschg, F. Gabriele, K. Otis, D. Korablev, G. Bonfini, E. Litvinovich, N. Rossi, Frank Calaprice, Hardy Simgen, C. Ghiano, Caren Hagner, R. Roncin, P. Cavalcante, M. Misiaszek, F. von Feilitzsch, L. Papp, Fausto Ortica, B. Neumair, AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Laboratori Nazionali del Gran Sasso (LNGS), Istituto Nazionale di Fisica Nucleare (INFN), Dept. Microelectronics and Nanoscience, Chalmers University of Technology [Göteborg], Laboratoire Kastler Brossel (LKB (Jussieu)), Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), departement de physique, Albert-Ludwigs-Universität Freiburg, Max-Planck-Institut für Astronomie (MPIA), Max-Planck-Gesellschaft, Institute of Physics, Polish Academy of Sciences, Polska Akademia Nauk = Polish Academy of Sciences (PAN), 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), Université Pierre et Marie Curie - Paris 6 (UPMC)-Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), 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), National Institute for Nuclear Physics (INFN), Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Agostini, M., Suvorov, Y., and Et, Al.

Subjects
Particle physics, Physics - Instrumentation and Detectors, Orders of magnitude (temperature), Physics::Instrumentation and Detectors, General Physics and Astronomy, FOS: Physical sciences, Electron, Scintillator, Electric charge, High Energy Physics - Experiment, Nuclear physics, Physics and Astronomy (all), High Energy Physics - Experiment (hep-ex), ddc:550, Nuclear Experiment, Borexino, ComputingMilieux_MISCELLANEOUS, Physics, [PHYS]Physics [physics], Liquid scintillation counting, Detector, Astrophysics::Instrumentation and Methods for Astrophysics, Instrumentation and Detectors (physics.ins-det), High Energy Physics::Experiment, Neutrino, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

Borexino is a liquid scintillation detector located deep underground at the Laboratori Nazionali del Gran Sasso (LNGS, Italy). Thanks to the unmatched radio-purity of the scintillator, and to the well understood detector response at low energy, a new limit on the stability of the electron for decay into a neutrino and a single mono-energetic photon was obtained. This new bound, tau > 6.6 10**28 yr at 90 % C.L., is two orders of magnitude better than the previous limit., 5 pages, 1 figure

Published
2015
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38. New limits on heavy sterile neutrino mixing inB8decay obtained with the Borexino detector

Author

A. M. Goretti, Aldo Ianni, Anton Empl, R. Tartaglia, S. V. Sukhotin, A. Wright, O. Zaimidoroga, A.V. Etenko, Jingke Xu, S. Schönert, Cristiano Galbiati, D. Bravo, V. V. Kobychev, E. V. Hungerford, C. Ghiano, Caren Hagner, P. Cavalcante, I. S. Drachnev, M. Misiaszek, W. Maneschg, P. J. Mosteiro, A. Sotnikov, Gioacchino Ranucci, Laura Cadonati, L. Papp, G. Bellini, D. Franco, M. D. Skorokhvatov, Michael Wurm, L. Grandi, Lothar Oberauer, Paolo Lombardi, Fausto Ortica, Matthias Laubenstein, B. Caccianiga, Andrea Ianni, D. Bick, Sandra Zavatarelli, Y. Suvorov, T. Lewke, D. Kryn, A. V. Derbin, F. Lombardi, Ben Loer, M. Obolensky, Q. Meindl, A. Razeto, G. Lukyanchenko, A. E. Chavarria, L. Perasso, S. Manecki, E. Meroni, M. Buizza Avanzini, V. N. Muratova, S. Gazzana, Lino Miramonti, S. Davini, G. Zuzel, E. Litvinovich, C. Salvo, G. Korga, K. Fomenko, D. Vignaud, N. Rossi, G. Manuzio, G. Bonfini, F. von Feilitzsch, Frank Calaprice, Hardy Simgen, R. Saldanha, J. Winter, M. Göger-Neff, Marco Giammarchi, A. Pocar, O. Smirnov, K. Otis, S. Perasso, M. M. Wojcik, Aldo Romani, Jay Burton Benziger, I. N. Machulin, Livia Ludhova, A. S. Chepurnov, Marco Pallavicini, D. D'Angelo, Denis Korablev, G. Testera, Alessandra Re, and R. B. Vogelaar

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Sterile neutrino, 010308 nuclear & particles physics, 7. Clean energy, 01 natural sciences, Side branch, 0103 physical sciences, High Energy Physics::Experiment, Heavy neutrino, Neutrino, 010306 general physics, Mixing (physics), Borexino
Abstract

If heavy neutrinos with mass ${m}_{{\ensuremath{\nu}}_{H}}\ensuremath{\ge}2{m}_{e}$ are produced in the Sun via the decay $^{8}\mathrm{B}\ensuremath{\rightarrow}^{8}\mathrm{Be}+{e}^{+}+{\ensuremath{\nu}}_{H}$ in a side branch of the $pp$ chain, they would undergo the observable decay into an electron, a positron and a light neutrino ${\ensuremath{\nu}}_{H}\ensuremath{\rightarrow}{\ensuremath{\nu}}_{L}+{e}^{+}+{e}^{\ensuremath{-}}$. In the present work Borexino data are used to set a bound on the existence of such decays. We constrain the mixing of a heavy neutrino with mass $1.5\text{ }\text{ }\mathrm{MeV}\ensuremath{\le}{m}_{{\ensuremath{\nu}}_{H}}\ensuremath{\le}14\text{ }\text{ }\mathrm{MeV}$ to be $|{U}_{eH}{|}^{2}\ensuremath{\le}({10}^{\ensuremath{-}3}\ensuremath{-}4\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}6})$, respectively. These are tighter limits on the mixing parameters than obtained in previous experiments at nuclear reactors and accelerators.

Published
2013

39. Geo-neutrino results with Borexino

Author

B. Lehnert, L. Papp, A.V. Etenko, G. Bonfini, A. Caminata, Fausto Ortica, Marco Pallavicini, F. Gabriele, Y. Suvorov, I. N. Machulin, D. Bravo, Livia Ludhova, D. D'Angelo, S. Weinz, A. M. Goretti, Frank Calaprice, A. S. Chepurnov, M. D. Skorokhvatov, Hardy Simgen, Michael Wurm, Matthias Laubenstein, P. J. Mosteiro, Michele Montuschi, S. Schönert, O. Smirnov, F. von Feilitzsch, E. Litvinovich, Denis Korablev, D. A. Semenov, F. Lombardi, M. S. Meyer, N. Rossi, E. V. Hungerford, Marco Giammarchi, A. Razeto, E. V. Unzhakov, C. Ghiano, S. Appel, Andrea Ianni, D. Bick, Sandra Zavatarelli, A. Sotnikov, Caren Hagner, R Roncin, E. Meroni, K. Jedrzejczak, R. B. Vogelaar, Kai Zuber, J. Winter, Lino Miramonti, Paolo Lombardi, P. Cavalcante, R. Tartaglia, Matteo Agostini, A. V. Derbin, Z. Yokley, D. Franco, B. Neumair, M. Misiaszek, I. S. Drachnev, S. V. Sukhotin, B. Caccianiga, G. Korga, K. Fomenko, Jay Burton Benziger, Marcin Wójcik, Aldo Romani, O. Zaimidoroga, G. Testera, H. Wang, L. Di Noto, W. Maneschg, L. Perasso, G. Zuzel, M. Goeger-Neff, Gioacchino Ranucci, G. Bellini, Lothar Oberauer, V. V. Kobychev, Aldo Ianni, M. Gromov, M. Obolensky, G. Lukyanchenko, V. N. Muratova, A. Pocar, D. Kryn, S. Manecki, M. Kaiser, J. Thurn, Cristiano Galbiati, Alessandra Re, S. Davini, A. Vishneva, S. Marcocci, M. Toropova, 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), Borexino, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), 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), Roncin, R., Agostini, M., Appel, S., Bellini, G., Benziger, J., Bick, D., Bonfini, G., Bravo, D., Caccianiga, B., Calaprice, F., Caminata, A., Cavalcante, P., Chepurnov, A., D'Angelo, D., Davini, S., Derbin, A., Di Noto, L., Drachnev, I., Etenko, A., Fomenko, K., Franco, D., Gabriele, F., Galbiati, C., Ghiano, C., Giammarchi, M., Goeger-Neff, M., Goretti, A., Gromov, M., Hagner, C., Hungerford, E., Ianni, Aldo, Ianni, Andrea, Jedrzejczak, K., Kaiser, M., Kobychev, V., Korablev, D., Korga, G., Kryn, D., Laubenstein, M., Lehnert, B., Litvinovich, E., Lombardi, F., Lombardi, P., Ludhova, L., Lukyanchenko, G., Machulin, I., Manecki, S., Maneschg, W., Marcocci, S., Meroni, E., Meyer, M., Miramonti, L., Misiaszek, M., Montuschi, M., Mosteiro, P., Muratova, V., Neumair, B., Oberauer, L., Obolensky, M., Ortica, F., Pallavicini, M., Papp, L., Perasso, L., Pocar, A., Ranucci, G., Razeto, A., Re, A., Romani, A., Rossi, N., Schoenert, S., Semenov, D., Simgen, H., Skorokhvatov, M., Smirnov, O., Sotnikov, A., Sukhotin, S., Suvorov, Y., Tartaglia, R., Testera, G., Thurn, J., Toropova, M., Unzhakov, E., Vishneva, A., Vogelaar, R. B., von Feilitzsch, F., Wang, H., Weinz, S., Winter, J., Wojcik, M., Wurm, M., Yokley, Z., Zaimidoroga, O., Zavatarelli, S., Zuber, K., Zuzel, G., and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)

Subjects
History, 010504 meteorology & atmospheric sciences, Solar neutrino, scintillation counter: liquid, chemistry.chemical_element, Scintillator, 010502 geochemistry & geophysics, 7. Clean energy, 01 natural sciences, thorium, Education, uranium, Nuclear physics, Physics and Astronomy (all), background: low, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], ddc:530, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Borexino, 0105 earth and related environmental sciences, Physics, Radionuclide, Radiogenic nuclide, Thorium, Mass ratio, nuclide: mass ratio, Computer Science Applications, chemistry, 13. Climate action, radioactivity, GEOPHYSICS, neutrino: geophysics, Neutrino, experimental results
Abstract

International audience; Borexino is a liquid scintillator detector primary designed to observe solar neutrinos. Due to its low background level as well as its position in a nuclear free country, Italy, Borexino is also sensitive to geo-neutrinos. Borexino is leading this interdisciplinary field of neutrino geoscience by studying electron antineutrinos which are emitted from the decay of radioactive isotopes present in the crust and the mantle of the Earth. With 2056 days of data taken between December 2007 and March 2015, Borexino observed 77 antineutrino candidates. If we assume a chondritic Th/U mass ratio of 3.9, the number of geo-neutrino events is found to be 23.7(+6.5) (-5.7)(stat) (+0.9)(-0.6) (syst). With this measurement, Borexino alone is able to reject the null geo-neutrino signal at 5.9σ, to claim a geo-neutrino signal from the mantle at 98% C.L. and to restrict the radiogenic heat production for U and Th between 23 and 36 TW.

Published
2016

40. Test of the electric charge conservation law with Borexino detector

Author

Z. Yokley, M. D. Skorokhvatov, Michael Wurm, D. A. Semenov, Kai Zuber, Cristiano Galbiati, L. Perasso, O. Smirnov, E. V. Unzhakov, S. Manecki, G. Bellini, Lothar Oberauer, E. Litvinovich, F. von Feilitzsch, S. V. Sukhotin, O. Zaimidoroga, N. Rossi, H. Wang, R. Tartaglia, Matthias Laubenstein, A.V. Etenko, G. Lukyanchenko, D. Bravo, Matteo Agostini, K. Jedrzejczak, V. V. Kobychev, A. Vishneva, Marcin Wójcik, M. Gromov, B. Neumair, P. J. Mosteiro, D. D 'Angelo, Michele Montuschi, Lino Miramonti, Gioacchino Ranucci, G. Korga, K. Fomenko, L. Papp, W. Maneschg, B. Lehnert, M. Obolensky, E. Meroni, S. Marcocci, E. V. Hungerford, Fausto Ortica, M. Toropova, V. N. Muratova, S. Davini, S. Weinz, A. Sotnikov, A. Pocar, A. Caminata, Marco Pallavicini, C. Ghiano, F. Gabriele, Caren Hagner, M. S. Meyer, S. Schönert, M. Goeger-Neff, P. Cavalcante, Marco Giammarchi, M. Misiaszek, G. Bonfini, D. Kryn, Paolo Lombardi, Jay Burton Benziger, J. Winter, Andrea Ianni, D. Bick, Sandra Zavatarelli, F. Lombardi, Frank Calaprice, G. Zuzel, M. Kaiser, D. Franco, A. V. Derbin, Hardy Simgen, A. Razeto, I. S. Drachnev, I. N. Machulin, S. Appel, G. Testera, Denis Korablev, B. Caccianiga, Y. Suvorov, Livia Ludhova, A. M. Goretti, A. S. Chepurnov, R. B. Vogelaar, Aldo Ianni, Aldo Romani, L. Di Noto, Alessandra Re, J. Thurn, R. Roncin, 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), Borexino, 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), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Vishneva, A., Agostini, M., Appel, S., Bellini, G., Benziger, J., Bick, D., Bonfini, G., Bravo, D., Caccianiga, B., Calaprice, F., Caminata, A., Cavalcante, P., Chepurnov, A., D'Angelo, D., Davini, S., Derbin, A., Di Noto, L., Drachnev, I., Etenko, A., Fomenko, K., Franco, D., Gabriele, F., Galbiati, C., Ghiano, C., Giammarchi, M., Goeger-Neff, M., Goretti, A., Gromov, M., Hagner, C., Hungerford, E., Ianni, Aldo, Ianni, Andrea, Jedrzejczak, K., Kaiser, M., Kobychev, V., Korablev, D., Korga, G., Kryn, D., Laubenstein, M., Lehnert, B., Litvinovich, E., Lombardi, F., Lombardi, P., Ludhova, L., Lukyanchenko, G., Machulin, I., Manecki, S., Maneschg, W., Marcocci, S., Meroni, E., Meyer, M., Miramonti, L., Misiaszek, M., Montuschi, M., Mosteiro, P., Muratova, V., Neumair, B., Oberauer, L., Obolensky, M., Ortica, F., Pallavicini, M., Papp, L., Perasso, L., Pocar, A., Ranucci, G., Razeto, A., Re, A., Romani, A., Roncin, R., Rossi, N., Schoenert, S., Semenov, D., Simgen, H., Skorokhvatov, M., Smirnov, O., Sotnikov, A., Sukhotin, S., Suvorov, Y., Tartaglia, R., Testera, G., Thurn, J., Toropova, M., Unzhakov, E., Vogelaar, R. B., Von Feilitzsch, F., Wang, H., Weinz, S., Winter, J., Wojcik, M., Wurm, M., Yokley, Z., Zaimidoroga, O., Zavatarelli, S., Zuber, K., Zuzel, 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, and PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)

Subjects
GRAN SASSO, +photon+neutrino%22">electron --> photon neutrino, History, Physics::Instrumentation and Detectors, scintillation counter: liquid, Electron, Scintillator, 01 natural sciences, Particle detector, Physics::Geophysics, Education, Nuclear physics, SCINTILLATOR, Physics and Astronomy (all), background: low, 0103 physical sciences, charge: conservation law, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], ddc:530, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 010303 astronomy & astrophysics, Borexino, lifetime, Physics, Charge conservation, STABILITY, 010308 nuclear & particles physics, Detector, EXPERIMENTAL LIMITS, Computer Science Applications, Neutrino detector, electron: lifetime, Neutrino, DECAY
Abstract

International audience; The new limit on the electron lifetime is obtained from data of the Borexino experiment. The expected signal from the e → γν decay mode is a 256 keV photon detected in liquid scintillator. Because of the extremely low radioactive background level in the Borexino detector it was possible to improve the previous measurement by two orders of magnitude.

Published
2016

41. The SOX experiment hunts the sterile neutrino

Author

Matthias Laubenstein, M. D. Skorokhvatov, Michael Wurm, Nicolas Jonqueres, Ö. Penek, Denis Korablev, D. Jeschke, Gioacchino Ranucci, D. A. Semenov, G. Bellini, Riccardo Musenich, Livia Ludhova, A. S. Chepurnov, K. Choi, M. Gromov, S. Davini, Thierry Lasserre, Andrey Formozov, E. Meroni, T. Houdy, S. Rottenanger, L. Lukyanchenko, Roberto Tartaglia, J. Gaffiot, V. Orekhov, A. Jany, D. Franco, E. Hungerford, V. N. Kornoukhov, Cristiano Galbiati, Loris Scola, Oleg Smirnov, G. Bonfini, A. Caminata, Frank Calaprice, Christian Veyssiere, Roman Roncin, M. Vivier, A. M. Goretti, Z. Bagdasarian, Fausto Ortica, S. Caprioli, M. Gschwender, Z. Yokley, A. V. Derbin, V. Atroshchenko, D. Guffanti, Andrea Ianni, V. N. Muratova, D. Bick, Sandra Zavatarelli, Alessio Porcelli, Lino Miramonti, Hongwei Wang, O. Zaimidoroga, Stefania Farinon, J. Thurn, N. Pilipenko, M. Redchuk, E. V. Unzhakov, B. Vogelaar, V. V. Kobychev, M. Carlini, F. Lombardi, Aldo Ianni, Stefan Schönert, L. Papp, A. Vishneva, Tobias Lachenmaier, Marco Giammarchi, Lea Di noto, G. Zuzel, Olivier Cloué, Lothar Oberauer, B. Neumair, S. Weinz, C. Ghiano, G. Korga, K. Fomenko, I. S. Drachnev, Caren Hagner, G. Testera, Aldo Romani, S. Marcocci, M. S. Meyer, L.F.F. Stokes, A. Sotnikov, Matteo Agostini, M. Toropova, L. Collica, V. Fischer, P. Cavalcante, M. Misiaszek, D. Bravo, Paolo Lombardi, I. N. Machulin, N. Rossi, Marcin Wójcik, Jay Burton Benziger, Marco Pallavicini, A. Razeto, F. Gabriele, D. D'Angelo, Kai Zuber, J. Maricic, S. Appel, Franz von Feilitzsch, G. Lukyanchenko, Antonio Di Ludovico, M. Cribier, G. Manuzio, Alessandra Re, A. Pocar, B. Caccianiga, J. Martyn, E. Litvinovich, G. Mention, Mathieu Durero, B. Opitz, Xuefeng Ding, D. Basilico, Y. Suvorov, D. Kryn, K. Altenmueller, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, 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), CEA-Direction de l'Energie Nucléaire (CEA-DEN), 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)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), 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
Sterile neutrino, Position resolution, Physics::Instrumentation and Detectors, antineutrino/e: particle source, energy resolution, Physics::Geophysics, Nuclear physics, mass: scale, background: low, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Mass scale, Neutrino oscillation, spatial resolution, Borexino, Physics, Multidisciplinary, neutrino: sterile: mass, talk: Venice 20017/03/13, calibration, sensitivity, Short distance, Gran Sasso, praseodymium, radioactivity, cerium: nuclide, High Energy Physics::Experiment, proposed experiment, neutrino: oscillation, Large size
Abstract

International audience; The SOX (Short distance neutrino Oscillations with BoreXino) experiment aims to perform a resolutive measurement for testing the longstanding hypotesis of a sterile neutrino in the eV$^2$ mass scale. A very intense and well calibrated $^{144}Ce-^{144}Pr$ antineutrino source will be placed under the large size and very low background Borexino detector at Laboratori Nazionali del Gran Sasso in Italy. Borexino demonstrated a such energy and position resolution that the disappearance experiment can be performed and the short distance oscillations might be directly observed. In this paper an overview of the key elements of the experiment is given and the expected sensitivity to determine the sterile neutrino mass is shown.

42. Recent results from Borexino

Author

L. Papp, Fausto Ortica, Kai Zuber, K. Altenmüller, S. Davini, K. Choi, A.V. Etenko, D. Bravo, Lino Miramonti, Matthias Laubenstein, M. Carlini, K. Jedrzejczak, R. Tartaglia, B. Neumair, G. Korga, K. Fomenko, E. Litvinovich, N. Rossi, Caren Hagner, S. Appel, R. Roncin, F. Lombardi, G. Bonfini, E. Meroni, Frank Calaprice, P. Cavalcante, M. Misiaszek, Gioacchino Ranucci, A. Razeto, F. von Feilitzsch, S. Marcocci, W. Maneschg, M. Toropova, A. Vishneva, B. Caccianiga, G. Zuzel, B. Lehnert, M. Obolensky, Z. Yokley, A. V. Derbin, E. V. Hungerford, F. Gabriele, M. Goeger-Neff, V. Atroshchenko, I. N. Machulin, V. N. Muratova, M. D. Skorokhvatov, Michael Wurm, I. S. Drachnev, Marco Pallavicini, D. D'Angelo, J. Winter, A. Sotnikov, S. Weinz, G. Testera, Lothar Oberauer, D. Franco, Paolo Lombardi, Y. Suvorov, D. A. Semenov, Livia Ludhova, A. M. Goretti, A. S. Chepurnov, M. Gromov, A. Jany, Denis Korablev, S. V. Sukhotin, O. Zaimidoroga, H. Wang, V. V. Kobychev, A. Pocar, O. Smirnov, E. V. Unzhakov, Marcin Wójcik, A. Caminata, D. Kryn, Aldo Ianni, G. Manuzio, R. B. Vogelaar, S. Manecki, Alessandra Re, S. Schönert, G. Lukyanchenko, Andrea Ianni, D. Bick, Sandra Zavatarelli, Matteo Agostini, Marco Giammarchi, Jay Burton Benziger, C. Ghiano, P. J. Mosteiro, Michele Montuschi, Aldo Romani, L. Di Noto, Michael Meyer, D. Jeschke, G. Bellini, Cristiano Galbiati, J. Thurn, 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), Borexino, 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), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Jeschke, D., Agostini, M., Altenmueller, K., Appel, S., Atroshchenko, V., Bellini, G., Benziger, J., Bick, D., Bonfini, G., Bravo, D., Caccianiga, B., Calaprice, F., Caminata, A., Carlini, M., Cavalcante, P., Chepurnov, A., Choi, K., D'Angelo, D., Davini, S., Derbin, A., Di Noto, L., Drachnev, I., Etenko, A., Fomenko, K., Franco, D., Gabriele, F., Galbiati, C., Ghiano, C., Giammarchi, M., Goeger-Neff, M., Goretti, A., Gromov, M., Hagner, C., Hungerford, E., Ianni, Aldo, Ianni, Andrea, Jany, A., Jedrzejczak, K., Kobychev, V., Korablev, D., Korga, G., Kryn, D., Laubenstein, M., Lehnert, B., Litvinovich, E., Lombardi, F., Lombardi, P., Ludhova, L., Lukyanchenko, G., Machulin, I., Manecki, S., Maneschg, W., Manuzio, G., Marcocci, S., Meyer, M., Miramonti, L., Misiaszek, M., Montuschi, M., Mosteiro, P., Muratova, V., Neumair, B., Oberauer, L., Obolensky, M., Ortica, F., Pallavicini, M., Papp, L., Pocar, A., Ranucci, G., Razeto, A., Re, A., Romani, A., Roncin, R., Rossi, N., Schoeert, S., Semenov, D., Skorokhvatov, M., Smirnov, O., Sotnikov, A., Sukhotin, S., Suvorov, Y., Tartaglia, R., Testera, G., Thurn, J., Toropova, M., Unzhakov, E., Vishneva, A., Vogelaar, R. B., von Feilitzsch, F., Wang, H., Weinz, S., Winter, J., Wojcik, M., Wurm, M., Yokley, Z., Zaimidoroga, O., Zavatarelli, S., Zuber, K., Zuzel, 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, and PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)

Subjects
History, Particle physics, neutrino: solar, Physics::Instrumentation and Detectors, Solar neutrino, Context (language use), 01 natural sciences, neutrino: flux, Education, Physics::Geophysics, Nuclear physics, Physics and Astronomy (all), Low energy, energy: solar, 0103 physical sciences, Energy spectrum, ddc:530, 010306 general physics, Borexino, scintillation counter, Physics, Charge conservation, Multidisciplinary, 010308 nuclear & particles physics, stability, Computer Science Applications, Gran Sasso, energy: production, Physics::Space Physics, High Energy Physics::Experiment, neutrino: geophysics, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

Journal of Physics Conference Series. - 798, International Conference on Particle Physics and Astrophysics : 10-14 October 2016, Moscow, Russian Federation / proceedings editors: 1. issue: cosmic rays: Arkady Galper (MEPhI, Moscow, Russia) [und 7 andere] 2nd International Conference on Particle Physics and Astrophysics, ICPPA 2016, Moscow, Russia, 11 Oct 2016 - 14 Oct 2016; Bristol : IOP Publ., Journal of Physics Conference Series, 798, 012114 pp. (2017). doi:10.1088/1742-6596/798/1/012114, Published by IOP Publ., Bristol

43. Comprehensive measurement of pp-chain solar neutrinos with Borexino

Author

S. Davini, Attilio Di Giacinto, D. Bravo, C. Ghiano, Caren Hagner, D. Basilico, Matthias Laubenstein, G. Raikov, Z. Bagdasarian, M. D. Skorokhvatov, Michael Wurm, Kai Zuber, P. Cavalcante, S. Kumaran, E. V. Unzhakov, Y. Suvorov, M. Misiaszek, K. Choi, M. Gromov, A. V. Derbin, E. Meroni, Andrey Formozov, D. A. Semenov, Lea Di noto, A. Caminata, L. Pietrofaccia, Livia Ludhova, Andrea Ianni, V. Atroshchenko, D. Jeschke, Valentino Di Marcello, O. Zaimidoroga, G. Bellini, A. Razeto, A. S. Chepurnov, B. Vogelaar, V. N. Muratova, Franz von Feilitzsch, M. Redchuk, Luigi Cappelli, A. M. Goretti, G. Manuzio, G. Lukyanchenko, G. Zuzel, S. Marcocci, I. S. Drachnev, S. Rottenanger, L. Papp, Lothar Oberauer, Michael Nieslony, V. Orekhov, A. Pocar, V. V. Kobychev, A. Sotnikov, Aldo Ianni, K. Altenmueller, Stefan Schönert, F. Cavanna, G. Bonfini, A. Vishneva, F. Gabriele, E. Hungerford, D. Franco, D. Bick, Sandra Zavatarelli, Frank Calaprice, Irina Lomskaya, B. Neumair, Jay Burton Benziger, G. Korga, M. S. Meyer, Maria Teresa Ranalli, Marcin Wójcik, K. Fomenko, J. Martyn, Ö. Penek, E. Litvinovich, M. Gschwender, Cristiano Galbiati, A. Jany, Oleg Smirnov, L. Lukyanchenko, Fausto Ortica, D. Guffanti, Xuefeng Ding, G. Testera, Lino Miramonti, Paolo Lombardi, Gioacchino Ranucci, Matteo Agostini, I. N. Machulin, N. Rossi, Tobias Lachenmaier, Marco Giammarchi, Marco Pallavicini, D. D'Angelo, J. Maricic, S. Appel, N. Pilipenko, Aldo Romani, B. Caccianiga, Roberto Tartaglia, Antonio Di Ludovico, Alessandra Re, and J. Thurn

Subjects
Proton–proton chain reaction, Physics, Particle physics, Survival probability, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Metallicity, Solar neutrino, High Energy Physics::Phenomenology, High Energy Physics::Experiment, Neutrino, Borexino
Abstract

A comprehensive measurement of solar neutrino fluxes has been completed using the Borexino Phase-II data in an extended energy range. The measurement reports pp, 7Be and pep neutrino fluxes with the highest precision ever achieved, 8B with the lowest energy threshold, the first Borexino limit on hep neutrinos, as well as the best limit on CNO neutrinos. These results and their physics interpretations concerning the so-called solar metallicity puzzle and the electron-neutrino survival probability, as well as other highlights of the analysis, have been summarized in this talk.

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