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

被引：319

作者：

Aguilar, M. ^{[31
]}

Aisa, D. ^{[37
,38
]}

Alpat, B. ^{[37
]}

Alvino, A. ^{[37
]}

Ambrosi, G. ^{[37
]}

Andeen, K. ^{[26
]}

Arruda, L. ^{[29
]}

Attig, N. ^{[24
,25
]}

Azzarello, P. ^{[18
]}

Bachlechner, A. ^{[1
,2
,11
]}

Barao, F. ^{[29
]}

Barrau, A. ^{[19
]}

Barrin, L. ^{[17
]}

Bartoloni, A. ^{[43
]}

Basara, L. ^{[41
]}

Battarbee, M. ^{[52
]}

Battiston, R. ^{[41
,42
,53
]}

Bazo, J. ^{[37
]}

Becker, U. ^{[11
]}

Behlmann, M. ^{[11
]}

Beischer, B. ^{[1
,2
]}

Berdugo, J. ^{[31
]}

Bertucci, B. ^{[37
,38
]}

Bindi, V. ^{[21
]}

Bizzaglia, S. ^{[37
]}

Bizzarri, M. ^{[37
,38
]}

Boella, G. ^{[33
,34
]}

de Boer, W. ^{[26
]}

Bollweg, K. ^{[22
,23
]}

Bonnivard, V. ^{[19
]}

Borgia, B. ^{[43
,44
]}

Borsini, S. ^{[37
]}

Boschini, M. J. ^{[33
]}

Bourquin, M. ^{[18
]}

Burger, J. ^{[11
]}

Cadoux, F. ^{[18
]}

Cai, X. D. ^{[11
]}

Capell, M. ^{[11
]}

Caroff, S. ^{[4
,5
]}

Casaus, J. ^{[31
]}

Castellini, G. ^{[16
]}

Cernuda, I. ^{[31
]}

Cerreta, D. ^{[37
,38
]}

Cervelli, F. ^{[39
]}

Chae, M. J. ^{[46
]}

Chang, Y. H. ^{[12
]}

Chen, A. I. ^{[11
]}

Chen, G. M. ^{[8
]}

Chen, H. ^{[11
]}

Chen, H. S. ^{[8
]}

机构：

[1] Rhein Westfal TH Aachen, Inst Phys, D-52056 Aachen, Germany

[2] Rhein Westfal TH Aachen, JARA FAME, D-52056 Aachen, Germany

[3] METU, Dept Phys, TR-06800 Ankara, Turkey

[4] CNRS, IN2P3, Lab Annecy Le Vieux Phys Particules, F-74941 Annecy Le Vieux, France

[5] Univ Savoie Mont Blanc, F-74941 Annecy Le Vieux, France

[6] Beihang Univ BUAA, Beijing 100191, Peoples R China

[7] Chinese Acad Sci, Inst Elect Engn, Beijing 100190, Peoples R China

[8] Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China

[9] INFN Sez Bologna, I-40126 Bologna, Italy

[10] Univ Bologna, I-40126 Bologna, Italy

[11] MIT, Cambridge, MA 02139 USA

[12] Natl Cent Univ, Chungli 32054, Tao Yuan, Taiwan

[13] Univ Maryland, East West Ctr Space Sci, College Pk, MD 20742 USA

[14] Univ Maryland, IPST, College Pk, MD 20742 USA

[15] Kyungpook Natl Univ, CHEP, Taegu 702701, South Korea

[16] CNR IROE, I-50125 Florence, Italy

[17] European Org Nucl Res CERN, CH-1211 Geneva 23, Switzerland

[18] Univ Geneva, DPNC, CH-1211 Geneva 4, Switzerland

[19] Univ Grenoble Alpes, CNRS, IN2P3, LPSC, F-38026 Grenoble, France

[20] Sun Yat Sen Univ, Guangzhou 510275, Guangdong, Peoples R China

[21] Univ Hawaii, Dept Phys & Astron, Honolulu, HI 96822 USA

[22] NASA, Lyndon B Johnson Space Ctr, Houston, TX 77058 USA

[23] Jacobs Sverdrup, Houston, TX 77058 USA

[24] Julich Supercomp Ctr, D-52425 Julich, Germany

[25] Res Ctr Julich, JARA FAME, D-52425 Julich, Germany

[26] Karlsruhe Inst Technol, Inst Expt Kernphys, D-76128 Karlsruhe, Germany

[27] Inst Astrofis Canarias, E-38205 San Cristobal la Laguna, Spain

[28] Univ La Laguna, Dept Astrofis, E-38206 San Cristobal la Laguna, Tenerife, Spain

[29] LIP, Lab Instrumentacao Fis Expt Particulas, P-1000 Lisbon, Portugal

[30] NCSIST, Taoyuan 325, Taiwan

[31] CIEMAT, E-28040 Madrid, Spain

[32] Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, Mexico

[33] INFN Sez Milano Bicocca, I-20126 Milan, Italy

[34] Univ Milano Bicocca, I-20126 Milan, Italy

[35] Southeast Univ, Nanjing 210096, Jiangsu, Peoples R China

[36] Yale Univ, Dept Phys, New Haven, CT 06520 USA

[37] INFN Sez Perugia, I-06100 Perugia, Italy

[38] Univ Perugia, I-06100 Perugia, Italy

[39] INFN Sez Pisa, I-56100 Pisa, Italy

[40] Univ Pisa, I-56100 Pisa, Italy

[41] INFN TIFPA, I-38123 Trento, Italy

[42] Univ Trent, I-38123 Trento, Italy

[43] INFN Sez Roma, I-100185 Rome, Italy

[44] Univ Roma La Sapienza, I-00185 Rome, Italy

[45] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13560970 Sao Carlos, SP, Brazil

[46] Ewha Womans Univ, Dept Phys, Seoul 120750, South Korea

[47] Shandong Univ SDU, Jinan 250100, Shandong, Peoples R China

[48] Shanghai Jiao Tong Univ, Shanghai 200030, Peoples R China

[49] Natl Cheng Kung Univ, Tainan 701, Taiwan

[50] ASGC, Taipei 11529, Taiwan

来源：

PHYSICAL REVIEW LETTERS | 2015年 / 115卷 / 21期

基金：

瑞士国家科学基金会; 芬兰科学院; 美国国家科学基金会; 巴西圣保罗研究基金会;

关键词：

INTERACTION CROSS-SECTIONS; ISOTOPIC COMPOSITION; LIGHT-NUCLEI; GEV-C; SPECTRA; PROTON; AMS-02; TEV; ORIGIN; MULTIPLICITIES;

D O I：

10.1103/PhysRevLett.115.211101

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

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.

引用

页数：9

共 76 条

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