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

  • AMS Collaboration
  • University of Geneva
  • CAS - Institute of High Energy Physics
  • CIEMAT
  • RWTH Aachen University
  • National Institute for Nuclear Physics
  • Laboratório de Instrumentação e Física Experimental de Partículas
  • Jülich Research Centre
  • CERN
  • University of Groningen
  • University of Trento
  • Massachusetts Institute of Technology
  • University of Perugia
  • University of Hawai'i at Mānoa
  • NASA Johnson Space Center
  • University of Rome La Sapienza
  • Kiel University
  • National Research Council of Italy
  • Academia Sinica - Institute of Physics
  • University of Chinese Academy of Sciences
  • National Central University
  • Université Grenoble Alpes
  • University of Bologna
  • Shandong University
  • Middle East Technical University
  • ASI Space Science Data Center (SSDC)
  • Southeast University, Nanjing
  • Instituto de Astrofísica de Canarias
  • University of La Laguna
  • University of Milan - Bicocca
  • Universidad Nacional Autónoma de México
  • National Chung–Shan Institute of Science and Technology (NCSIST)
  • Sun Yat-Sen University
  • Kyungpook National University
  • Academia Sinica Taiwan HQ
  • CAS - Institute of Electrical Engineering
  • Moscow Engineering Physics Institute
  • University of Oulu
  • University of Maryland, College Park
  • Shandong Institute of Advanced Technology
  • University of Turku
  • Italian Space Agency
  • National Cheng Kung University
  • Beihang University

Research output: Contribution to journalConference articlepeer-review

Abstract

We report the properties of aluminum (Al) nuclei in cosmic rays measured 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 spectrum is well described by the weighted sum of the silicon spectrum (primary cosmic rays) and the fluorine spectrum (secondary cosmic rays). The fraction of the 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.

Original languageEnglish
Article number110
JournalProceedings of Science
Volume395
StatePublished - 18 Mar 2022
Event37th International Cosmic Ray Conference, ICRC 2021 - Virtual, Berlin, Germany
Duration: 12 Jul 202123 Jul 2021

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