Insight into History of GCR Heavy Nuclei Fluxes by Their Tracks in Meteorites

Alexandrov A.B. Bagulya A.V. Babaev P.A. Chernyavsky M.M. Gippius A.A. Gorbunov S.A. Grachev V.M. Kalinina G.V. Konovalova N.S. Okateva N.M. Polukhina N.G. Rymzhanov R.A. Starkov N.I. Soe T.N. Shchedrina T.V. Volkov A.E. Voronkov R.A.
October 2022 Pleiades Publishing

Physics of Atomic Nuclei
2022 #85 Issue 5 446 - 458 pp.

Abstract: The OLIMPIYA project investigates tracks of galactic cosmic rays (GCR) in olivine crystals from two meteorites-pallasites of different exposure ages. Extended statistics (up to 21 743 processed tracks) enabled to reveal a difference between the charge spectra of heaviest nuclei registered in these pallasites versus those from detectors mounted on near-Earth orbit satellites, as well as a difference between the GCR spectra registered in the meteorites themselves. Comparison of the r-element abundances in these spectra points that GCR fluxes from at least two rare cosmic nucleosynthesis events with enhanced production of these elements reached the Solar System during the exposition age of the older meteorite. Correlations of the experimental results with parameters of supernovae, asymptotic giant branches stars and neutron star mergers (NSM) are also discussed.

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Lebedev Physical Institute, Russian Academy of Sciences, Moscow, Russian Federation
National University of Science and Technology ‘‘MISiS’’, Moscow, Russian Federation
National Research Nuclear University MEPhI, Moscow, Russian Federation
Flerov Laboratory of Nuclear Reactions, Joint Institute for Nuclear Research, Dubna, Russian Federation
Institute of Nuclear Physics, Almaty, Kazakhstan
National Research Centre ‘‘Kurchatov Institute’’, Moscow, Russian Federation

Lebedev Physical Institute
National University of Science and Technology ‘‘MISiS’’
National Research Nuclear University MEPhI
Flerov Laboratory of Nuclear Reactions
Institute of Nuclear Physics
National Research Centre ‘‘Kurchatov Institute’’

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