Precision Measurement of Cosmic-Ray Nitrogen and its Primary and Secondary Components with the Alpha Magnetic Spectrometer on the International Space Station
文献类型：期刊论文
| 作者 | AMS Collaboration |
| 刊名 | PHYSICAL REVIEW LETTERS
 |
| 出版日期 | 2018 |
| 卷号 | 121期号:5页码:51103 |
| ISSN号 | 0031-9007 |
| DOI | 10.1103/PhysRevLett.121.051103 |
| 文献子类 | Article |
| 英文摘要 | A precision measurement of the nitrogen flux with rigidity (momentum per unit charge) from 2.2 GV to 3.3 TV based on 2.2 x 10(6) events is presented. The detailed rigidity dependence of the nitrogen flux spectral index is presented for the first time. The spectral index rapidly hardens at high rigidities and becomes identical to the spectral indices of primary He, C, and O cosmic rays above similar to 700 GV. We observed that the nitrogen flux Phi(N) can be presented as the sum of its primary component Phi(P)(N) and secondary component Phi(S)(N), Phi(N) = Phi(P)(N) + Phi(S)(N), and we found Phi(N) is well described by the weighted sum of the oxygen flux Phi(O) (primary cosmic rays) and the boron flux Phi(B) (secondary cosmic rays), with Phi(P)(N) = (0.090 +/- 0.002) x Phi(O) and Phi(S)(N) = (0.62 +/- 0.02) x Phi(B) over the entire rigidity range. This corresponds to a change of the contribution of the secondary cosmic ray component in the nitrogen flux from 70% at a few GV to < 30% above 1 TV. |
| 电子版国际标准刊号 | 1079-7114 |
| WOS关键词 | GEOMAGNETIC REFERENCE FIELD ; ENERGY-SPECTRA ; CHARGE COMPOSITION ; NUCLEI ; AMS-02 ; GENERATION ; ABUNDANCES ; DETECTOR ; CARBON ; FLIGHT |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000440386100003 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/286176]  |
| 专题 | 高能物理研究所_实验物理中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | AMS Collaboration. Precision Measurement of Cosmic-Ray Nitrogen and its Primary and Secondary Components with the Alpha Magnetic Spectrometer on the International Space Station[J]. PHYSICAL REVIEW LETTERS,2018,121(5):51103. |
| APA | AMS Collaboration.(2018).Precision Measurement of Cosmic-Ray Nitrogen and its Primary and Secondary Components with the Alpha Magnetic Spectrometer on the International Space Station.PHYSICAL REVIEW LETTERS,121(5),51103. |
| MLA | AMS Collaboration."Precision Measurement of Cosmic-Ray Nitrogen and its Primary and Secondary Components with the Alpha Magnetic Spectrometer on the International Space Station".PHYSICAL REVIEW LETTERS 121.5(2018):51103. |
入库方式： OAI收割
来源：高能物理研究所
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