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タムラ タダヒサ
Tamura Tadahisa 田村 忠久 所属 神奈川大学 工学部 応用物理学科 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 |
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| 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. |
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