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
AMS collaboration
刊名PHYSICAL REVIEW LETTERS
2016
卷号117期号:23页码:231102
DOI10.1103/PhysRevLett.117.231102
文章类型Journal article (JA)
英文摘要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螖 with index 螖=-0.333卤0.014(fit)卤0.005(syst), in good agreement with the Kolmogorov theory of turbulence which predicts 螖=-1/3 asymptotically. 漏 2016 authors. Published by the American Physical Society.
语种英语
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文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/260709
专题中国科学院高能物理研究所_粒子天体物理中心_期刊论文
作者单位中国科学院高能物理研究所
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AMS collaboration. 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[J]. PHYSICAL REVIEW LETTERS,2016,117(23):231102.
APA AMS collaboration.(2016).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.PHYSICAL REVIEW LETTERS,117(23),231102.
MLA AMS collaboration."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".PHYSICAL REVIEW LETTERS 117.23(2016):231102.
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