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Полухина, Наталья Геннадьевна

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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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Полухина

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Наталья Геннадьевна

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Теперь показываю 1 - 10 из 33

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Muon Radiography of Large Natural and Industrial Objects—A New Stage in the Nuclear Emulsion Technique
(2022) Aleksandrov, A. B.; Vasina, S. G.; Galkin, V. I.; Grachev, V. M.; Konovalov, A. S.; Konovalova, N. S.; Korolev, P. S.; Larionov, A. A.; Managadze, A. K.; Melnichenko, I. A.; Okateva, N. M.; Polukhina, N. G.; Roganova, T. M.; Sadykov, Zh. T.; Starkov, N. I.; Starkova, E. N.; Tioukov, V. E.; Chernyavskiy, M. M.; Shevchenko, V. I.; Shchedrina, T. V.; Полухина, Наталья Геннадьевна; Шевченко, Владимир Игоревич; Грачев, Виктор Михайлович
A new study of a historical object on the territory of the Russian Federation, the Holy Trinity Danilov Monastery, implemented by the muon radiography is presented. The method is based on the registration of changes in the cosmic muon fluxes during their passage through the object under study. Nuclear photoemulsions with unique spatial and angular resolution having the widest range of applications in experimental nuclear physics were used as experimental equipment. The experiment demonstrates a high efficiency of the method in the search for hidden objects, the presence of which on the territory of the monastery is confirmed by the results obtained. Acknowledgement: В статье нет раздела Acknowledgement
Только метаданные
Investigation of Dynamics of Heat Propagation in Meteorite Matter and Its Influence on Geometric Features of Tracks of Nuclei in Olivine Crystals from Meteorites
(2021) Soe, T. N.; Starkov, N. I.; Polukhina, N. G.; Полухина, Наталья Геннадьевна
© 2021, Pleiades Publishing, Ltd.Abstract: The dynamics of heating of a meteorite that travels through the Earth’s atmosphere is studied. The heating of its matter over the meteorite fall time is estimated by solving the heat-propagation equation. It is shown that the temperature of olivine crystals situated at a distance of 3 to 5 mm from the meteorite edge may reach 1200 to 1300C, and this may lead to the track-annealing effect. As a result, some tracks disappear, while some of them change their geometric features. This may explain an unusual shape of the charge distribution of nuclei found in olivine crystals situated near the meteorite edge.
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Algorithm for Determining the Thickness of the Cut Olivine Layer when Determining Charges of Galactic Nuclei
(2021) Soe, T. N.; Starkov, N. I.; Polukhina, N. G.; Полухина, Наталья Геннадьевна
© 2021, Allerton Press, Inc.Abstract: An algorithm for determining the thickness of the olivine layer cut when determining charges of galactic nuclei from meteorites is presented. The calculation results related to the intersection points of nuclei trajectory projections on the crystal surface at different stages are presented. It is shown that the mechanism is valid to control cut operations when searching for traces of galactic nuclei in olivines from meteorites with good accuracy.
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The SHiP experiment at the proposed CERN SPS Beam Dump Facility
(2022) Ahdida, C.; Akmete, A.; Albanese, R.; Alt, J.; Atkin, E.; Dmitrenko, V.; Etenko, A.; Fillipov, K.; Grachev, V.; Kudenko, Y.; Polukhina, N.; Samsonov, V.; Shustov, A.; Skorokhvatov, M.; Smirnov, S.; Teterin, P.; Ulin, S.; Uteshev, Z.; Vlasik, K.; Аткин, Эдуард Викторович; Дмитренко, Валерий Васильевич; Этенко, Александр Владимирович; Грачев, Виктор Михайлович; Куденко, Юрий Григорьевич; Полухина, Наталья Геннадьевна; Шустов, Александр Евгеньевич; Скорохватов, Михаил Дмитриевич; Смирнов, Сергей Юрьевич; Тетерин, Пётр Евгеньевич; Улин, Сергей Евгеньевич; Утешев, Зияэтдин Мухамедович; Власик, Константин Федорович
© 2022, The Author(s).The Search for Hidden Particles (SHiP) Collaboration has proposed a general-purpose experimental facility operating in beam-dump mode at the CERN SPS accelerator to search for light, feebly interacting particles. In the baseline configuration, the SHiP experiment incorporates two complementary detectors. The upstream detector is designed for recoil signatures of light dark matter (LDM) scattering and for neutrino physics, in particular with tau neutrinos. It consists of a spectrometer magnet housing a layered detector system with high-density LDM/neutrino target plates, emulsion-film technology and electronic high-precision tracking. The total detector target mass amounts to about eight tonnes. The downstream detector system aims at measuring visible decays of feebly interacting particles to both fully reconstructed final states and to partially reconstructed final states with neutrinos, in a nearly background-free environment. The detector consists of a 50m long decay volume under vacuum followed by a spectrometer and particle identification system with a rectangular acceptance of 5 m in width and 10 m in height. Using the high-intensity beam of 400GeV protons, the experiment aims at profiting from the 4 × 10 19 protons per year that are currently unexploited at the SPS, over a period of 5–10 years. This allows probing dark photons, dark scalars and pseudo-scalars, and heavy neutral leptons with GeV-scale masses in the direct searches at sensitivities that largely exceed those of existing and projected experiments. The sensitivity to light dark matter through scattering reaches well below the dark matter relic density limits in the range from a few MeV/c2 up to 100 MeV-scale masses, and it will be possible to study tau neutrino interactions with unprecedented statistics. This paper describes the SHiP experiment baseline setup and the detector systems, together with performance results from prototypes in test beams, as it was prepared for the 2020 Update of the European Strategy for Particle Physics. The expected detector performance from simulation is summarised at the end.
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Muon radiography method for non-invasive probing an archaeological site in the Naryn-Kala citadel
(2019) Abiev, A.; Bagulya, A.; Chernyavskiy, M.; Dashkina, A.; Grachev, V.; Polukhina, N.; Грачев, Виктор Михайлович; Полухина, Наталья Геннадьевна
© 2019 by the authors.The paper presents the test experiment to investigate one of UNESCO's (United Nations Educational, Scientific and Cultural Organization) world heritage objects, an archaeological site in the Naryn-Kala citadel (Derbent, Republic of Dagestan, Russian Federation) hidden under the ground's surface. The function of the site could be revealed by the muon radiography studies. Several nuclear emulsion detectors were exposed for two months inside the site at a depth about 10 m from the modern surface. The use of nuclear emulsions as probing radiation detectors combined with the potential of modern image analysis methods provides for a uniquely high resolution capacity of recording instrumentation and 3D reconstruction of the internal structure of the investigated object. Here we present the experiment and data analysis details and the first results.
Только метаданные
Search for weakly interacting massive dark matter particles: state of the art and prospects
(2021) Aleksandrov, A. B.; Dashkina, A. B.; Konovalova, N. S.; Okat'eva, N. M.; Polukhina, N. G.; Полухина, Наталья Геннадьевна
Determining the nature of dark matter (DM) is one of the most important challenges of modern experimental physics. This article overviews the major arguments confirming the existence of DM, gives the latest classifications of DM particles, identifies possible candidates for their role, and discusses the most significant DM particle search experiments conducted and under development. The article mainly aims to give an idea of diverse experimental methods of and approaches to registering DM particles, as well as of the currently available results of the search for them, which open new prospects in DM studies and contribute to solving topical problems in New Physics.
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Updated constraints on sterile neutrino mixing in the OPERA experiment using a new ν e identification method
(2023) Agafonova, N.; Aleksandrov, A.; Anokhina, A.; Aoki, S.; Polukhina, N.; Полухина, Наталья Геннадьевна
This paper describes a new $ОЅ_e$ identification method specifically designed to improve the low-energy ($andlt; 30\,\mathrm{GeV}$) $ОЅ_e$ identification efficiency attained by enlarging the emulsion film scanning volume with the next generation emulsion readout system. A relative increase of 25-70% in the $ОЅ_e$ low-energy region is expected, leading to improvements in the OPERA sensitivity to neutrino oscillations in the framework of the 3 + 1 model. The method is applied to a subset of data where the detection efficiency increase is expected to be more relevant, and one additional $ОЅ_e$ candidate is found. The analysis combined with the $ОЅ_П„$ appearance results improves the upper limit on $\sin
Только метаданные
Anomaly of the Charge Spectrum of Galactic Cosmic Ray Nuclei in Olivines as Evidence of Meteorite Radiation History
(2020) Alexandrov, A. B.; Bagulya, A. V.; Volkov, A. E.; Gippius, A. A.; Grachev, V. M.; Polukhina, N. G.; Грачев, Виктор Михайлович; Полухина, Наталья Геннадьевна
© 2020, Allerton Press, Inc.Abstract: A new additional aspect of the analysis of the data of the OLYMPIA experiment on the search for nuclei of heavy cosmic ray components in olivine crystals from stony—iron meteorites is presented. Two groups of crystals with different charge spectra of recorded nuclei are detected. Possible causes of this phenomenon and its effect on the final spectrum are discussed.
Только метаданные
The magnet of the scattering and neutrino detector for the SHiP experiment at CERN
(2020) Ahdida, C.; Albanese, R.; Alexandrov, A.; Anokhina, A.; Atkin, E.; Dmitrenko, V.; Etenko, A.; Filippov, K.; Gavrilov, G.; Grachev, V.; Kudenko, Y.; Novikov, A.; Polukhina, N.; Samsonov, V.; Shustov, A.; Skorokhvatov, M.; Smirnov, S.; Teterin, P.; Ulin, S.; Uteshev, Z.; Vlasik, K.; Аткин, Эдуард Викторович; Дмитренко, Валерий Васильевич; Этенко, Александр Владимирович; Грачев, Виктор Михайлович; Куденко, Юрий Григорьевич; Полухина, Наталья Геннадьевна; Шустов, Александр Евгеньевич; Скорохватов, Михаил Дмитриевич; Смирнов, Сергей Юрьевич; Тетерин, Пётр Евгеньевич; Улин, Сергей Евгеньевич; Утешев, Зияэтдин Мухамедович; Власик, Константин Федорович
© 2020 CERN. Published by IOP Publishing Ltd on behalf of Sissa Medialab. Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.The Search for Hidden Particles (SHiP) experiment proposal at CERN demands a dedicated dipole magnet for its scattering and neutrino detector. This requires a very large volume to be uniformly magnetized at B > 1.2 T, with constraints regarding the inner instrumented volume as well as the external region, where no massive structures are allowed and only an extremely low stray field is admitted. In this paper we report the main technical challenges and the relevant design options providing a comprehensive design for the magnet of the SHiP Scattering and Neutrino Detector.
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Muography of the Cave Church of the Holy Dormition Pskovo-Pechersky Monastery
(2023) Alexandrov, A. B.; Anokhina, A. M.; Vasina, S. G.; Gippius, A. A.; Gorbunov, V. A.; Grachev, V. M.; Konovalova, N. S.; Krasilnikova, Yu. O.; Larionov, A. A.; Managadze, A. K.; Melnichenko, I. A.; Okateva, N. M.; Paramonov, S. S.; Petrukhin, A. A.; Polukhina, N. G.; Roganova, T. M.; Sadykov, Zh. T.; Starkov, N. I.; Starkova, E. N.; Tioukov, V. E.; Chernyavskii, M. M.; Shevchenko, V. I.; Shchedrina, T. V.; Полухина, Наталья Геннадьевна; Шевченко, Владимир Игоревич; Ларионов, Алексей Александрович; Петрухин, Анатолий Афанасьевич
The method for visualizing the internal structure of objects (muography method) based on the analysis of the features of passages of atmospheric muons generated in cosmic ray interactions, is based on the spatial distributions of trajectories of penetrating muons recorded by detectors. The method is at the junction of elementary particle physics with many other areas of natural science, e.g., with archaeology. The article presents the results of a muographic study of two objects in the cave complex of a unique historical and archaeological monument, i.e., the Holy Dormition Pskovo-Pechersky Monastery. The experimental technique is based on nuclear emulsion detectors.