Precision Measurement of the Boron to Carbon Flux Ratio in Cosmic Rays from 1.9 GV to 2.6 TV with the Alpha Magnetic Spectrometer on the International Space Station

Date

2016-11-28

Author

AGUILAR, M.
CAVASONZA, L. Ali
AMBROSI, G.
ARRUDA, L.
ATTIG, N.
AUPETIT, S.
AZZARELLO, P.
BACHLECHNER, A.
BARAO, F.
BARRAU, A.
BARRIN, L.
BARTOLONI, A.
BASARA, L.
PREE, S. Basegmez-du
Battarbee, M.
BATTISTON, R.
BECKER, U.
BEHLMANN, M.
BEISCHER, B.
BERDUGO, J.
BERTUCCI, B.
BINDEL, K. F.
BINDI, V.
BOELLA, G.
DE BOER, W.
BOLLWEG, K.
BONNIVARD, V.
BORGIA, B.
BOSCHINI, M. J.
BOURQUIN, M.
Bueno, E. F.
BURGER, J.
CADOUX, F.
CAI, X. D.
CAPELL, M.
CAROFF, S.
CASAUS, J.
CASTELLINI, G.
CERVELLI, F.
CHAE, M. J.
CHANG, Y. H.
CHEN, A. I.
CHEN, G. M.
CHEN, H. S.
CHENG, L.
CHOU, H. Y.
CHOUMILOV, E.
CHOUTKO, V.
CHUNG, C. H.
CLARK, C.
CLAVERO, R.
COIGNET, G.
CONSOLANDI, C.
CONTIN, A.
CORTI, C.
CREUS, W.
CRISPOLTONI, M.
CUI, Z.
DAI, Y. M.
DELGADO, C.
DELLA TORRE, S.
DEMAKOV, O.
Demirköz, Melahat Bilge
DEROME, L.
DI FALCO, S.
DIMICCOLI, F.
DIAZ, C.
VON DOETINCHEM, P.
DONG, F.
DONNINI, F.
DURANTI, M.
D'URSO, D.
EGOROV, A.
ELINE, A.
Eronen, T.
FENG, J.
FIANDRINI, E.
FINCH, E.
FISHER, P.
FORMATO, V.
GALAKTIONOV, Y.
GALLUCCI, G.
GARCIA, B.
GARCIA-LOPEZ, R. J.
GARGIULO, C.
GAST, H.
GEBAUER, I.
GERVASI, M.
GHELFI, A.
GIOVACCHINI, F.
GOGLOV, P.
GOMEZ-CORAL, D. M.
GONG, J.
GOY, C.
GRABSKI, V.
GRANDI, D.
GRAZIANI, M.
GUO, K. H.
HAINO, S.
Han, K. C.
He, Z. H.
Heil, M.
Hoffman, J.
Hsieh, T. H.
Huang, H.
Huang, Z. C.
Huh, C.
Incagli, M.
Ionica, M.
Jang, W. Y.
Jinchi, H.
Kang, S. C.
Kanishev, K.
Kim, G. N.
Kim, K. S.
Kirn, Th.
Konak, C.
Kounina, O.
Kounine, A.
Koutsenko, V.
Krafczyk, M. S.
La Vacca, G.
Laudi, E.
Laurenti, G.
Lazzizzera, I.
Lebedev, A.
Lee, H. T.
Lee, S. C.
Leluc, C.
Li, H. S.
Li, J. Q.
Li, J. Q.
Li, Q.
Li, T. X.
Li, W.
Li, Y.
Li, Z. H.
Li, Z. Y.
Lim, S.
Lin, C. H.
Lipari, P.
Lippert, T.
Liu, D.
Liu, Hu
Lordello, V. D.
Lu, S. Q.
Lu, Y. S.
Luebelsmeyer, K.
Luo, F.
Luo, J. Z.
Lv, S. S.
Machate, F.
Majka, R.
Mana, C.
Marin, J.
Martin, T.
Martinez, G.
Masi, N.
Maurin, D.
Menchaca-Rocha, A.
Meng, Q.
Mikuni, V. M.
Mo, D. C.
Morescalchi, L.
Mott, P.
Nelson, T.
Ni, J. Q.
Nikonov, N.
Nozzoli, F.
Oliva, A.
Orcinha, M.
Palmonari, F.
Palomares, C.
Paniccia, M.
Pauluzzi, M.
Pensotti, S.
Pereira, R.
Picot-Clemente, N.
Pilo, F.
Pizzolotto, C.
Plyaskin, V.
Pohl, M.
Poireau, V.
Putze, A.
Quadrani, L.
Qi, X. M.
Qin, X.
Qu, Z. Y.
Raeihae, T.
Rancoita, P. G.
Rapin, D.
Ricol, J. S.
Rosier-Lees, S.
Rozhkov, A.
Rozza, D.
Sagdeev, R.
Sandweiss, J.
Saouter, P.
Schael, S.
Schmidt, S. M.
von Dratzig, A. Schulz
Schwering, G.
Seo, E. S.
Shan, B. S.
Shi, J. Y.
Siedenburg, T.
Son, D.
Song, J. W.
Sun, W. H.
Tacconi, M.
Tang, X. W.
Tang, Z. C.
Tao, L.
Tescaro, D.
Ting, Samuel C. C.
Ting, S. M.
Tomassetti, N.
Torsti, J.
Turkoglu, C.
Urban, T.
Vagelli, V.
Valente, E.
Vannini, C.
Valtonen, E.
Acosta, M. Vazquez
Vecchi, M.
Velasco, M.
Vialle, J. P.
Vitale, V.
Vitillo, S.
Wang, L. Q.
Wang, N. H.
Wang, Q. L.
Wang, X.
Wang, X. Q.
Wang, Z. X.
Wei, C. C.
Weng, Z. L.
Whitman, K.
Wienkenhoever, J.
Wu, H.
Wu, X.
Xia, X.
Xiong, R. Q.
Xu, W.
Yan, Q.
Yang, J.
Yang, M.
Yang, Y.
Yi, H.
Yu, Y. J.
Yu, Z. Q.
Zeissler, S.
Zhang, C.
Zhang, J.
Zhang, J. H.
Zhang, S. D.
Zhang, S. W.
Zhang, Z.
Zheng, Z. M.
Zhu, Z. Q.
Zhuang, H. L.
Zhukov, V.
Zichichi, A.
Zimmermann, N.
Zuccon, P.

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Knowledge of the rigidity dependence of the boron to carbon flux ratio (B/C) is important in understanding the propagation of cosmic rays. The precise measurement of the B/C ratio from 1.9 GV to 2.6 TV, based on 2.3 million boron and 8.3 million carbon nuclei collected by AMS during the first 5 years of operation, is presented. The detailed variation with rigidity of the B/C spectral index is reported for the first time. The B/C ratio does not show any significant structures in contrast to many cosmic ray models that require such structures at high rigidities. Remarkably, above 65 GV, the B/C ratio is well described by a single power law R. with index. Delta = -0.333 +/- 0.014(fit) +/- 0.005(syst), in good agreement with the Kolmogorov theory of turbulence which predicts. Delta = -1/3 asymptotically.

Subject Keywords

General Physics and Astronomy

URI

https://hdl.handle.net/11511/54408

Collections

Department of Physics, Article