Персона: Мачулин, Игорь Николаевич
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Институт ядерной физики и технологий
Цель ИЯФиТ и стратегия развития - создание и развитие научно-образовательного центра мирового уровня в области ядерной физики и технологий, радиационного материаловедения, физики элементарных частиц, астрофизики и космофизики.
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Игорь Николаевич
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- ПубликацияТолько метаданныеSearch for low-energy signals from fast radio bursts with the Borexino detector(2022) Appel, S.; Bagdasarian, Z.; Basilico, D.; Bellini, G.; Litvinovich, E.; Machulin, I.; Nugmanov, R.; Skorokhvatov, M.; Zhutikov, I.; Литвинович, Евгений Александрович; Мачулин, Игорь Николаевич; Скорохватов, Михаил Дмитриевич; Жутиков, Иван Николаевич© 2022, The Author(s).The search for neutrino events in correlation with 42 most intense fast radio bursts (FRBs) has been performed using the Borexino dataset from 05/2007 to 06/2021. We have searched for signals with visible energies above 250 keV within a time window of ±1000 s corresponding to detection time of a particular FRB. We also applied an alternative approach based on searching for specific shapes of neutrino-electron scattering spectra in the full exposure data of the Borexino detector. In particular, two incoming neutrino spectra were considered: the monoenergetic line and the spectrum expected from supernovae. The same spectra were considered for electron antineutrinos detected through inverse beta-decay reaction. No statistically significant excess over the background was observed. As a result, the strongest upper limits on FRB-associated neutrino fluences of all flavors have been obtained in the 0.5–50 MeV neutrino energy range.
- ПубликацияТолько метаданныеThe study of neutrinos and antineutrinos from astrophysical sources by Borexino(2024) Zavatarelli, S.; Basilico, D.; Bellini, G.; Benziger, J.; Litvinovich, E.; Machulin, I.; Skorokhvatov, M.; Литвинович, Евгений Александрович; Мачулин, Игорь Николаевич; Скорохватов, Михаил Дмитриевич
- ПубликацияТолько метаданныеBorexinos search for low-energy neutrinos associated with gravitational wave events from GWTC-3 database(2023) Basilico, D.; Bellini, G.; Benziger, J.; Biondi, R.; Machulin, I.; Nugmanov, R.; Skorokhvatov, M.; Litvinovich E.; Мачулин, Игорь Николаевич; Скорохватов, Михаил Дмитриевич; Литвинович, Евгений АлександровичThe search for neutrino events in correlation with gravitational wave (GW) events for three observing runs (O1, O2 and O3) from 09/2015 to 03/2020 has been performed using the Borexino data-set of the same period. We have searched for signals of neutrino-electron scattering and inverse beta-decay (IBD) within a time window of +/- 1000 s centered at the detection moment of a particular GW event. The search was done with three visible energy thresholds of 0.25, 0.8 and 3.0 MeV. Two types of incoming neutrino spectra were considered: the mono-energetic line and the supernova-like spectrum. GW candidates originated by merging binaries of black holes (BHBH), neutron stars (NSNS) and neutron star and black hole (NSBH) were analyzed separately. Additionally, the subset of most intensive BHBH mergers at closer distances and with larger radiative mass than the rest was considered. In total, follow-ups of 74 out of 93 gravitational waves reported in the GWTC-3 catalog were analyzed and no statistically significant excess over the background was observed. As a result, the strongest upper limits on GW-associated neutrino and antineutrino fluences for all flavors (nu(e),nu(mu),nu(tau)) at the level 10(9)-10(15) cm(-2) GW(-1) have been obtained in the 0.5-5 MeV neutrino energy range.
- ПубликацияТолько метаданныеDirectionality measurement of CNO neutrinos with Borexino detector(2024) Basilico, D.; Bellini, G.; Biondi, R.; Benziger, J.; Litvinovich, E.; Machulin, I.; Skorokhvatov, M.; Литвинович, Евгений Александрович; Мачулин, Игорь Николаевич; Скорохватов, Михаил Дмитриевич
- ПубликацияТолько метаданныеUltra-low background physics: lessons from Borexino and future steps(2025) Zavatarelli, S.; Basilico, D.; Bellini, G.; Benziger, J.; Litvinovich, E.; Machulin, I.; Skorokhvatov, M.; Литвинович, Евгений Александрович; Мачулин, Игорь Николаевич; Скорохватов, Михаил Дмитриевич
- ПубликацияТолько метаданныеOptimized α/β pulse shape discrimination in Borexino(2024) Basilico, D.; Bellini, G.; Benziger, J.; Biondi, R.; Litvinovich, E.; Machulin, I.; Skorokhvatov, M.; Литвинович, Евгений Александрович; Мачулин, Игорь Николаевич; Скорохватов, Михаил Дмитриевич
- ПубликацияОткрытый доступCombined directional and spectral analysis of solar neutrinos from Carbon-Nitrogen-Oxygen fusion cycle with Borexino Experiment(2024) Singhal, A.; Basilico, D.; Bellini, G.; Benziger, J.; Litvinovich, E.; Machulin, I.; Skorokhvatov, M.; Литвинович, Евгений Александрович; Мачулин, Игорь Николаевич; Скорохватов, Михаил ДмитриевичBorexino, placed at LNGS in Italy, was a 280-ton liquid scintillator detector that took data from May 2007 to October 2021. Thanks to its unprecedented radio-purity, the real time spectroscopic measurement of solar neutrinos from both the \textit{pp}-chain and Carbon-Nitrogen-Oxygen (CNO) fusion cycle of the Sun has been performed. Borexino also reported the first directional measurement of sub-MeV $
- ПубликацияОткрытый доступFinal results of Borexino on CNO solar neutrinos(2023) Basilico, D.; Bellini, G.; Benziger, J.; Biondi, R.; Litvinovich, E.; Machulin, I.; Skorokhvatov, M.; Литвинович, Евгений Александрович; Мачулин, Игорь Николаевич; Скорохватов, Михаил Дмитриевич