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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 | 2022/09 |
| 形態種別 | 学術雑誌 |
| 査読 | 査読あり |
| 標題 | Observation of Spectral Structures in the Flux of Cosmic-Ray Protons from 50 GeV to 60 TeV 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 | The American Physical Society |
| 巻・号・頁 | 129(101102),pp.1-8 |
| 著者・共著者 | PHYSICAL REVIEW LETTERS 129, 101102 (2022) |
| 概要 | A precise measurement of the cosmic-ray proton spectrum with CALET is presented in the energy interval from 50 GeV to 60 TeV, and the observation of a softening of the spectrum above 10 TeV is reported. Above a few hundred GeV we confirm our previous observation of a progressive spectral hardening with a higher significance. In the multi-TeV region we observe a second spectral feature with a softening around 10 TeV and a spectral index change from −2.6 to −2.9 consistently, within the errors, with the shape of the spectrum reported by DAMPE. We apply a simultaneous fit of the proton differential spectrum which well reproduces the gradual change of the spectral index encompassing the lower energy power-law regime and the two spectral features observed at higher energies. |
| DOI | 10.1103/PhysRevLett.129.101102 |
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