Jul 12 – 23, 2021
Europe/Berlin timezone

Properties of Cosmic Aluminum Nuclei: Results from the Alpha Magnetic Spectrometer

Jul 14, 2021, 6:00 PM
1h 30m


Poster CRD | Cosmic Ray Direct Discussion


Zhen Liu (University of Geneva)


We report the properties of aluminum (Al) cosmic rays in the rigidity range 2.15 GV to 3.0 TV with 0.51 million nuclei collected by the Alpha Magnetic Spectrometer experiment on the International Space Station. We observed that above 6 GV the Al flux is well described by the weighted sum of the silicon flux (primary cosmic rays) and the fluorine flux (secondary cosmic rays). The fraction of primary component increases with rigidity and becomes dominant at highest rigidities. Al/Si abundance ratio at the source is determined independent of cosmic ray propagation models.

Subcategory Experimental Results
Collaboration AMS

Primary authors

Zhen Liu (University of Geneva) cheng zhang (Institute of high energy physics, Chinese Academy of Sciences) Mercedes Paniccia (University of Geneva)

Presentation materials