Natural superheavy nuclei in astrophysical dataOPEN ACCESS 

Andrey Alexandrov, Victor Alexeev, Alexander Bagulya, Aigerim Dashkina, Mikhail Chernyavsky, Alexei Gippius, Lyudmila Goncharova, Sergei Gorbunov, Victor Grachev, Galina Kalinina, Nina Konovalova, Natalia Okateva, Tatiana Pavlova, Natalia Polukhina, Ruslan Rymzhanov, Nikolai Starkov, Than Naing Soe, Tatiana Shchedrina, Alexander Volkov

Prepared for submission to Journal of Cosmology and Astroparticle Physics (JCAP)


“The paper presents the summary data of the authors’ research within the frame-work of the OLIMPIYA project (the Russian acronym of OLIviny iz Meteoritov —Poisk tyazholykh I sverkhtyazholykh YAder / Olivines from meteorites: Search for heavy and superheavy nuclei) and results of track analysis for heavy cosmic ray nuclei (Z= 26–129) in olivine crystals from meteorites using an original processing technique. A total of 21,743 tracks of nuclei heavier than iron have been identified in meteoritic matter to date to form the largest database within this charge range. The database includes three tracks of superheavy nuclei with the lifetimes of about a few decades, which can be considered as direct experi-mental evidence for the existence of natural superheavy nuclei from the “island of stability”. Comprehensive comparative analysis of data from two meteorites with different cosmic ray exposure ages, Marjalahti (from 178 to 205 Myr) and Eagle Station (from 35 to 71 Myr), is presented for the first time. The results are discussed within the existing concepts of nuclei formation in astrophysical processes.”