Precision measurement of the lithium flux in cosmic rays with the AMS-02 detector

The Alpha Magnetic Spectrometer (AMS-02) is a magnetic spectrometer designed for the precision study of cosmic ray (CR) composition and energy spectrum from GeV to TeV. It was installed on May 2011 on the International Space Station and is continuously taking data since then. Using the high acceptance (0.45 m2sr) and long exposure time, AMS-02 is able to measure the flux of numerous CR species and to study their spectral index variation as a function of energy. In particular, lithium nuclei in cosmic rays are produced by the spallation of heavier ions that collide with interstellar nuclei. For this reason, the abundance of lithium in CRs is a useful tool to model the propagation of CRs in the Galaxy. In this contribution the precision measurement of the lithium flux from 1.9 GV to 3 TV, based on 1.9 million events collected by AMS-02 detector in five years is discusse