BEXCO - Room F(201/202/203/204)
[CRD129] Precision Measurement of Lithium Flux in Cosmic Rays with the Alpha Magnetic Spectrometer on the International Space Station
Lithium nuclei in cosmic rays are believed to be produced exclusively by collisions of heavier cosmic rays such as Be,B,C,N,O with the interstellar matter. Data from the previous experiments are limited and inconsistent. A precise measurement of the lithium flux from 2 GV to 3 TV, based on 2 million events collected by AMS in the first five years of operation, is presented. The detailed variation with rigidity of the lithium flux spectral index is reported for the first time. Unexpectedly, the lithium flux spectral index hardens at high rigidities.