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| 題名: | Precision Measurement of the Helium Flux in Primary Cosmic Rays of Rigidities 1.9 GV to 3 TV with the Alpha Magnetic Spectrometer on the International Space Station |
| 作者: | 張元翰;Vitale, V;Nelson, T;Beischer, B;Bizzaglia, S;Barrau, A;Demirkoz, M B;Shan, Y H;Yu, Y J;Consolandi, C;Nozzoli, F;Schmidt, S M;Battarbee, M;Egorov, A;Lee, H T;Lee, S C;Vecchi, M;Wang, Z X;Bachlechner, A;He, Z H;Mana, C;Chen, H;Berdugo, J;Yan, Q;Hsieh, T H;Battiston, R;Yi, H;Zhang, C;Corti, C;Cui, Z;Luo, J Z;Rancoita, P G;Chou, H Y;Heil, M;Tang, X W;Gargiulo, C;Fiasson, A;Grandi, D;Li, H L;Qu, Z Y;Paniccia, M;Choumilov, E;Aisa, D;Qin, X;Spinella, F;Zhuang, H L;Guo, K H;Ionica, M;von Doetinchem, P;Shi, Y M;Diaz, C;Huang, Z C;Xu, W;Bizzarri, M;Lim, S;Di Masso, L;Lv, S S;Xu, N S;Zhang, M T;Crispoltoni, M;Pereira, R;Willenbrock, M;Zichichi, A;Kim, G N;Song, J W;Mo, D C;Li, Z H;Lin, C H;Quadrani, L;Eronen, T;Sagdeev, R;Rosier-Lees, S;Eline, A;Bartoloni, A;Fan, Y Y;Vitillo, S;Garcia, B;Galaktionov, Y;C, Turko\capitalbreve g;Putze, A;Gebauer, I;Li, W;Velasco, M;Li, Q;Lippert, T;Bollweg, K;Nunes, P;Wu, X;Menchaca-Rocha, A;Jang, W Y;Poireau, V;Wang, N H;Lu, Y S;Chen, G M;Tao, L;Alpat, B;Li, T X;Tang, C P;Rozza, D;Finch, E;Lebedev, A |
| 貢獻者: | 理學院物理學系 |
| 關鍵詞: | Astrophysics;Astrophysics and Astronomy;Constants;Cosmic rays;Cosmology and Extra-Galactic Astrophysics;Flux;Helium;Physics;Primary cosmic rays;Rigidity;Spectra;Television |
| 日期: | 2015-11-17 |
| 上傳時間: | 2026-04-23 12:40:27 (UTC+8) |
| 出版者: | American Physical Society;United States: American Physical Society |
| 摘要: | 摘要： Knowledge of the precise rigidity dependence of the helium flux is important in understanding the origin, acceleration, and propagation of cosmic rays. A precise measurement of the helium flux in primary cosmic rays with rigidity (momentum/charge) from 1.9 GV to 3 TV based on 50 million events is presented and compared to the proton flux. The detailed variation with rigidity of the helium flux spectral index is presented for the first time. The spectral index progressively hardens at rigidities larger than 100 GV. The rigidity dependence of the helium flux spectral index is similar to that of the proton spectral index though the magnitudes are different. Remarkably, the spectral index of the proton to helium flux ratio increases with rigidity up to 45 GV and then becomes constant; the flux ratio above 45 GV is well described by a single power law.
其他題名： Phys Rev Lett
出版者： United States: American Physical Society
出版日期： 2015-11-17
出處： Physical review letters, 2015-11, Vol.115 (21), p.211101, Article 211101
資源來源： American Physical Society Journals
版權： licence_http://creativecommons.org/publicdomain/zero
識別號： ISSN: 0031-9007
識別號： ISSN: 1079-7114
識別號： ISSN: 1092-0145
識別號： EISSN: 1079-7114
識別號： DOI: 10.1103/PhysRevLett.115.211101
識別號： PMID: 26636836 |
| 顯示於類別: | [物理學系] 期刊論文
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