タムラ タダヒサ   Tamura Tadahisa
  田村 忠久
   所属   神奈川大学  工学部 物理学教室
    神奈川大学大学院  工学研究科 工学専攻(応用物理学領域)
   職種   教授
言語種別 英語
発行・発表の年月 2020/12
形態種別 学術雑誌
標題 Direct Measurement of the Cosmic-Ray Carbon and Oxygen Spectra from 10 GeV/n to 2.2 TeV/n with the Calorimetric Electron Telescope on the International Space Station
執筆形態 共著
掲載誌名 PHYSICAL REVIEW LETTERS
掲載区分国外
出版社・発行元 American Physical Society
巻・号・頁 125(251102),pp.1-7
著者・共著者 O. Adriani, et al.
概要 The energy spectra are measured in kinetic energy per nucleon from 10 GeV/n to
2.2 TeV/n with an all-calorimetric instrument with a total thickness corresponding to 1.3 nuclear
interaction length. The observed carbon and oxygen fluxes show a spectral index change of ∼0.15 around
200 GeV=n established with a significance > 3σ. They have the same energy dependence with a constant
C/O flux ratio 0.911 +- 0.006 above 25 GeV/n. The spectral hardening is consistent with that measured by
AMS-02, but the absolute normalization of the flux is about 27% lower, though in agreement with
observations from previous experiments including the PAMELA spectrometer and the calorimetric
balloon-borne experiment CREAM.