@article{86c3277ba6684d94ad4b94c31cc8b59b,
title = "Precision Measurement of Cosmic-Ray Nitrogen and its Primary and Secondary Components with the Alpha Magnetic Spectrometer on the International Space Station",
abstract = "A precision measurement of the nitrogen flux with rigidity (momentum per unit charge) from 2.2 GV to 3.3 TV based on 2.2×106 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 ∼700 GV. We observed that the nitrogen flux ΦN can be presented as the sum of its primary component ΦNP and secondary component ΦNS, ΦN=ΦNP+ΦNS, and we found ΦN is well described by the weighted sum of the oxygen flux ΦO (primary cosmic rays) and the boron flux ΦB (secondary cosmic rays), with ΦNP=(0.090±0.002)×ΦO and ΦNS=(0.62±0.02)×ΦB 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.",
author = "\{(AMS Collaboration)\} and M. Aguilar and \{Ali Cavasonza\}, L. and B. Alpat and G. Ambrosi and L. Arruda and N. Attig and S. Aupetit and P. Azzarello and A. Bachlechner and F. Barao and A. Barrau and L. Barrin and A. Bartoloni and L. Basara and \{Ba{\c s}eǧmez-Du Pree\}, S. and M. Battarbee and R. Battiston and U. Becker and M. Behlmann and B. Beischer and J. Berdugo and B. Bertucci and Bindel, \{K. F.\} and V. Bindi and \{De Boer\}, W. and K. Bollweg and V. Bonnivard and B. Borgia and Boschini, \{M. J.\} and M. Bourquin and Bueno, \{E. F.\} and J. Burger and Burger, \{W. J.\} and Cai, \{X. D.\} and M. Capell and S. Caroff and J. Casaus and G. Castellini and F. Cervelli and Chang, \{Y. H.\} and Chen, \{A. I.\} and Chen, \{G. M.\} and Chen, \{H. S.\} and Y. Chen and L. Cheng and Chou, \{H. Y.\} and E. Choumilov and V. Choutko and Chung, \{C. H.\} and Wang, \{Q. L.\}",
note = "Publisher Copyright: {\textcopyright} 2018 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the «https://creativecommons.org/licenses/by/4.0/» Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.",
year = "2018",
month = jul,
day = "31",
doi = "10.1103/PhysRevLett.121.051103",
language = "英语",
volume = "121",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "5",
}