Precision Measurement of the Proton Flux in Primary Cosmic Rays from Rigidity 1 GV to 1.8 TV with the Alpha Magnetic Spectrometer on the International Space Station
Precision Measurement of the Proton Flux in Primary Cosmic Rays from Rigidity 1 GV to 1.8 TV with the Alpha Magnetic Spectrometer on the International Space Station
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DOI：
10.1103/physrevlett.114.171103
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发表时间：
2015-04-30
影响因子：
8.6
通讯作者：
Zurbach, C.
中科院分区：
文献类型：
--
作者：
Aguilar, M.;Aisa, D.;Zurbach, C.
基于3亿个事件，给出了刚性（动量/电荷）从1 GV到1.8 TV的初级宇宙线中质子通量的精确测量。质子通量的刚性依赖性的知识对于理解宇宙射线的起源、加速和传播是很重要的。本文首次给出了通量谱指数随刚度的详细变化。光谱指数在高刚度下逐渐变硬。
A precise measurement of the proton flux in primary cosmic rays with rigidity (momentum/charge) from 1 GV to 1.8 TV is presented based on 300 million events. Knowledge of the rigidity dependence of the proton flux is important in understanding the origin, acceleration, and propagation of cosmic rays. We present the detailed variation with rigidity of the flux spectral index for the first time. The spectral index progressively hardens at high rigidities.