The new AMS-02 precision measurement of the cosmic-ray Fluorine flux shows a possible difference in the propagation of light and heavy cosmic-ray species.
The article published on PRL and selected as Editor’s Suggestion, is available in open-access at the address:
https://journals.aps.org/prl/abstract/10.1103/PysRevLett.126.081102?ft=1
The AMS Bologna group, involved in the measurement of cosmic ray nuclei, contributed directly to this publication with a cross-check analysis.