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Ali Cavasonza, L; Attig, N; Bachlechner, A; Barrau, A; Barrin, L; Bartoloni, A; Başeğmez-du Pree, S; Battarbee, M; Becker, U; Bertucci, B; Cadoux, F; Cai, X D; Chae, M J; Chang, Y H; Chen, G M; Choutko, V; Consolandi, C; Cui, Z; Della Torre, S; Di Falco, S; Díaz, C; von Doetinchem, P; Egorov, A; Eronen, T; Fiandrini, E; Finch, E; Gallucci, G; Gargiulo, C; Gast, H; Gervasi, M; Gong, J; Goy, C; Grabski, V; He, Z H; Huang, Z C; Huh, C; Ionica, M; Jang, W Y; Kang, S C; Kanishev, K; Kirn, Th; Kounina, O; Kounine, A; Koutsenko, V; Krafczyk, M S; Laudi, E; Laurenti, G; Lazzizzera, I; Lebedev, A; Lee, S C; Li, H S; Lim, S; Lin, C H; Liu, D; Lu, S Q; Luebelsmeyer, K; Luo, F; Lv, S S; Masi, N; Mikuni, V M; Morescalchi, L; Orcinha, M; Pauluzzi, M; Pensotti, S; Pereira, R; Pilo, F; Plyaskin, V; Pohl, M; Putze, A; Qi, X M; Rozza, D; Saouter, P; Schael, S; Shan, B S; Shi, J Y; Son, D; Sun, W H; Tang, X W; Tao, L; Vannini, C; Valtonen, E; Vecchi, M; Vitale, V; Vitillo, S; Wang, N H; Wang, X; Wang, X Q; Weng, Z L; Wienkenhöver, J; Wu, H; Wu, X; Xiong, R Q; Yan, Q; Yang, Y; Zhang, S D; Zhang, S W; Zhuang, H L; Zhukov, V; Zichichi, A; Zimmermann, N
Physical review letters, 2016-Dec-02, Letnik: 117, Številka: 23Journal Article
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^{Δ} with index Δ=-0.333±0.014(fit)±0.005(syst), in good agreement with the Kolmogorov theory of turbulence which predicts Δ=-1/3 asymptotically.
