Lithium and Beryllium isotopes with the PAMELA experiment

Abstract

The cosmic-ray lithium and beryllium (${}^6$Li, ${}^7$Li, ${}^7$Be, ${}^9$Be, ${}^{10}$Be) isotopic composition has been measured with the satellite-borne experiment PAMELA, which was launched into low-Earth orbit on-board the Resurs-DK1 satellite on June 15th 2006. The rare lithium and beryllium isotopes in cosmic rays are believed to originate mainly from the interaction of high energy carbon, nitrogen and oxygen nuclei with the interstellar medium (ISM), but also on "tertiary" interactions in the ISM (i.e. produced by further fragmentation of secondary beryllium and boron). In this paper the isotopic ratios ${}^7$Li/${}^6$Li and ${}^7$Be/(${}^9$Be + ${}^{10}$Be) measured between 150 and 1100 MeV/n using two different detector systems from July 2006 to September 2014 will be presented.

arXiv comment13 pages, 11 figures, accepted for publication in the Astrophysical Journal. arXiv admin note: text overlap with arXiv:1512.06535

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