Bonn 2020 – scientific programme

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T: Fachverband Teilchenphysik

T 102: Cosmic rays V

T 102.2: Talk

Friday, April 3, 2020, 11:15–11:30, L-3.001

Study of Lithium Isotopic Composition in Cosmic Rays with AMS-02 — •Manbing Li — I. Physikalisches Institut B, RWTH Aachen

AMS-02 is a multi-purpose magnetic spectrometer designed for precise measurements of cosmic ray fluxes above Earth's atmosphere. The isotopic compositions of cosmic ray nuclei are of great interest since they directly reflect processes related to cosmic ray propagation through the Galaxy. In seven years of data taking, AMS has collected the largest available dataset on fluxes of nuclei. The AMS Ring Imaging Cherenkov detector provides particle velocity measurements with a resolution better than 0.1%, and the silicon tracker measures the particle momentum inside the 0.14 Tesla field created by the AMS magnet. With these measurements, the mass of the selected events can be calculated, which allows the measurement of relative isotopic abundances. Here we present the study of lithium isotopic composition in the energy range from about 1 GeV/n to 10 GeV/n where no other precise measurements are currently available.