Научная группа: Лаборатория космических исследований (Кафедра №7 ИЯФиТ)
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Study of the 27-day variations in the GCR fluxes in 2007-2008 based on PAMELA and ARINA observations
(2019) Modzelewska, R.; Bazilevskaya, G. A.; Boezio, M.; Krainev, M. B.; Koldashov, S. V.; Mayorov, A. G.; Mayorov,A.G.; Mayorova, M. A.; Troitskaya, I. K.; Майоров, Андрей Георгиевич; Юлбарисов, Рустам Фаритович
© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0).We have investigated the energy and time dependences of the amplitude of the proton galactic cosmic ray intensity 27-days oscillations in 2007-2008 from the data of the PAMELA and ARIN? spectrometers on board the RESURS DK-1 satellite. We have used different types of harmonic analysis, such as Fourier and wavelet analysis. The time profiles and amplitude dependences for the rigidities of cosmic ray particles from ~300 MV to tens of GV were obtained. It is shown that the amplitude-rigidity dependence cannot be described by a power law at low energies, the amplitude decreases with decreasing rigidity starting from ~ 1 GV. For a physical interpretation, we have studied the relationship between the 27-day variations of GCR and heliospheric parameters: solar wind velocity and heliospheric magnetic field.
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Time Dependence of the Flux of Helium Nuclei in Cosmic Rays Measured by the PAMELA Experiment between 2006 July and 2009 December
(2020) Marcelli, N.; Boezio, M.; Lenni, A.; Menn, W.; Galper, A. M.; Koldashov, S. V.; Koldobskiy, S. A.; Leonov, A. A.; Malakhov, V. V.; Mayorov, A. G.; Mikhailov, V. V.; Spillantini, P.; Voronov, S. A.; Yurkin, Y. T.; Колдобский, Сергей Александрович; Леонов, Алексей Анатольевич; Малахов, Виталий Валерьевич; Майоров, Андрей Георгиевич; Михайлов, Владимир Владимирович; Воронов, Сергей Александрович; Юркин, Юрий Тихонович
Precise time-dependent measurements of the Z = 2 component in the cosmic radiation provide crucial information about the propagation of charged particles through the heliosphere. The PAMELA experiment, with its long flight duration (2006 June 15-2016 January 23) and the low energy threshold (80 MeV/n) is an ideal detector for cosmic-ray solar modulation studies. In this paper, the helium nuclei spectra measured by the PAMELA instrument from 2006 July to 2009 December over a Carrington rotation time basis are presented. A state-of-the-art three-dimensional model for cosmic-ray propagation inside the heliosphere was used to interpret the time-dependent measured fluxes. Proton-to-helium flux ratio time profiles at various rigidities are also presented in order to study any features that could result from the different masses and local interstellar spectra shapes.
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Numerical Modeling of the Interaction of Dark Atoms with Nuclei to Solve the Problem of Direct Dark Matter Search
(2023) Bikbaev, T.; Khlopov, M.; Mayorov, A.; Хлопов, Максим Юрьевич; Майоров, Андрей Георгиевич
The puzzle of the direct dark matter search can be resolved by examining the concept of «dark atoms», which consist of hypothetical stable lepton-like particles with a charge of −2n, where n is any natural number, bound to n nuclei of primordial helium. These «dark atoms», known as «XHe» (X-helium) atoms, remain undiscovered in experiments due to their neutral atom-like states. In this model, the positive results of the DAMA/NaI and DAMA/LIBRA experiments could be explained by the annual modulation of radiative capture of XHe atoms engaging in low-energy bound states with sodium nuclei. This specific phenomenon does not occur under the conditions of other underground experiments. The proposed solution to this puzzle involves establishing the existence of a low-energy bound state of «dark atoms» and nuclei while also considering the self-consistent influence of nuclear attraction and Coulomb repulsion. Resolving this complex issue, which has remained unsolved for the past 17 years, necessitates a systematic approach. To tackle this problem, numerical modeling is employed to uncover the fundamental processes behind the interaction of «dark atoms» with nuclei. To comprehend the essence of XHe’s interaction with baryonic matter nuclei, a classical model is employed wherein quantum physics and nuclear size effects are progressively incorporated. A numerical model describing the interaction between XHe «dark atoms» and nuclei is developed through the continuous inclusion of realistic features of quantum mechanics in the initial classical three-body problem involving the X-particle, the helium nucleus, and the target nucleus. This approach yields a comprehensive numerical model that encompasses nuclear attraction and electromagnetic interaction between the «dark atom» and nuclei. Finally, this model aids in supporting the interpretation of the results obtained from direct underground dark matter experiments through the lens of the «dark atom» hypothesis.
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Studies of cosmic-ray solar modulation with the PAMELA experiment
(2023) Lenni, A.; Boezio, M.; Munini, R.; Marcelli, N.; Galper, A. M.; Koldashov, S. V.; Koldobskiy, S. A.; Leonov, A. A.; Malakhov, V. V.; Mayorov, A. G.; Mikhailov, V. V.; Spillantini, P.; Voronov, S. A.; Yurkin, Y. T.; Колдобский, Сергей Александрович; Леонов, Алексей Анатольевич; Малахов, Виталий Валерьевич; Майоров, Андрей Георгиевич; Михайлов, Владимир Владимирович; Воронов, Сергей Александрович; Юркин, Юрий Тихонович
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Quantum Mechanical Numerical Model for Interaction of Dark Atom with Atomic Nucleus of Matter
(2025) Bikbaev, T.; Khlopov, M.; Mayorov, A.; Майоров, Андрей Георгиевич
Организационные подразделения
Организационная единица
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.
Описание
Направления исследований:
- Галактические и внегалактические объекты
Изучение экстремальных условий во Вселенной: окрестности сверхновых, пульсаров, ядер галактик, а также поиск следов гипотетических частиц темной материи
- Солнце и гелиосфера
Исследование Солнца и гелиосферы — области пространства вокруг нас, где основная плотность энергии связана с магнитными полями и плазмой, источником которых является наша звезда
- Магнитосфера
Анализ данных о космических лучах в околоземном пространстве, в т.ч. в радиационных поясах Земли, их взаимосвязь с космо- и геофизическими процессами
- Экспериментальная физика космических лучей
Обработки и/или анализ научных данных или результатов моделирования для экспериментов по регистрации космических лучей, таких как PAMELA, AMS-02 и JUNO