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

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/105594

Title:	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
Authors:	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
Contributors:	理學院物理學系
Keywords:	Astrophysics;Astrophysics and Astronomy;Constants;Cosmic rays;Cosmology and Extra-Galactic Astrophysics;Flux;Helium;Physics;Primary cosmic rays;Rigidity;Spectra;Television
Date:	2015-11-17
Issue Date:	2026-04-23 12:40:27 (UTC+8)
Publisher:	American Physical Society;United States: American Physical Society
Abstract:	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
Appears in Collections:	[Department of Physics] journal & Dissertation

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