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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 | 2022/04 |
| 形態種別 | 学術雑誌 |
| 査読 | 査読あり |
| 標題 | Direct Measurement of the Nickel Spectrum in Cosmic Rays in the Energy Range from 8.8 GeV/n to 240 GeV/n with CALET 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 | 128(131103),pp.1-8 |
| 著者・共著者 | O. Adriani, et al. |
| 概要 | The relative abundance of cosmic ray nickel nuclei with respect to iron is by far larger than for all other transition elements; therefore it provides a favorable opportunity for a low background measurement of its spectrum. Since nickel, as well as iron, is one of the most stable nuclei, the nickel energy spectrum and its relative abundance with respect to iron provide important information to estimate the abundances at the cosmic ray source and to model the Galactic propagation of heavy nuclei. In this Letter, we present a measurement of the differential energy spectrum of nickel in the energy range from 8.8 to 240 GeV/n, carried out with unprecedented precision by the Calorimetric Electron Telescope (CALET) in operation on the International Space Station since 2015. |
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