Precision measurement of cosmic-ray antiproton spectrum
Precision measurement of cosmic-ray antiproton spectrum
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DOI：
10.1103/physrevlett.84.1078
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发表时间：
2000-02-07
影响因子：
8.6
通讯作者：
Yoshimura, K
中科院分区：
文献类型：
--
作者：
Orito, S;Maeno, T;Yoshimura, K
根据BESS在最近一次太阳活动极小期收集的458（p）超棒反质子，测量了0.18- 3.56GeV范围内的宇宙线反质子能谱。我们首次探测到了来自宇宙射线与星际气体相互作用的2 GeV（p）的特征峰。理论计算再现了峰值谱，表明传播模型基本正确，不同种类的宇宙线经历了普遍的传播。未来的BESS数据与更高的统计将使我们能够研究太阳调制和传播的细节，并寻找主要的（p）杆组件。
The energy spectrum of cosmic-ray antiprotons ((p) over bar's) has been measured in the range 0.18-3.56 GeV, based on 458 (p) over bar's collected by BESS in a recent solar-minimum period. We have detected for the first time a characteristic peak at 2 GeV of (p) over bar's originating from cosmic-ray interactions with the interstellar gas. The peak spectrum is reproduced by theoretical calculations, implying that the propagation models are basically correct and that different cosmic-ray species undergo a universal propagation. Future BESS data with still higher statistics will allow us to study the solar modulation and the propagation in detail and to search for primary (p) over bar components.