Properties of Cosmic Lithium Isotopes Measured by the Alpha Magnetic Spectrometer


Aguilar M., Ambrosi G., Anderson H., Arruda L., Attig N., Bagwell C., ...Daha Fazla

PHYSICAL REVIEW LETTERS, cilt.134, sa.20, 2025 (SCI-Expanded, Scopus) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 134 Sayı: 20
  • Basım Tarihi: 2025
  • Doi Numarası: 10.1103/physrevlett.134.201001
  • Dergi Adı: PHYSICAL REVIEW LETTERS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Compendex, INSPEC, MathSciNet, zbMATH, DIALNET, Nature Index
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

We present the first measurement of cosmic-ray fluxes of Li-6 and Li-7 isotopes in the rigidity range from 1.9 to 25 GV. The measurements are based on 9.7 x 10(5) 6Li and 1.04 x 10(6) 7Li nuclei collected by the Alpha Magnetic Spectrometer on the International Space Station from May 2011 to October 2023. We observe that over the entire rigidity range the Li-6 and Li-7 fluxes exhibit nearly identical time variations and, above similar to 4 GV, the time variations of Li-6, Li-7, He, Be, B, C, N, and O fluxes are identical. Above similar to 7 GV, we find an identical rigidity dependence of the Li-6 and Li-7 fluxes. This shows that they are both produced by collisions of heavier cosmic-ray nuclei with the interstellar medium and, in particular, excludes the existence of a sizable primary component in the Li-7 flux.