标题： 高能宇宙射线 显示英文标题

标题： High-energy Cosmic Rays

摘要： 在对银河宇宙射线从GeV到TeV能量范围进行了简要回顾之后，我们描述了一些当前对于极高能粒子感兴趣的课题。 谱线的两个特征尤其引人注目：高于$10^{15}$eV 的“膝部”和高于$10^{18}$eV 的“踝部”。 一个重要的问题是最高能量的粒子是否为河外起源，如果是的话，这种转变发生在什么能量上。 所有能量范围内共同的主题是利用核丰度作为理解宇宙射线起源的工具。 显示英文摘要

摘要： After a brief review of galactic cosmic rays in the GeV to TeV energy range, we describe some current problems of interest for particles of very high energy. Particularly interesting are two features of the spectrum, the `knee' above $10^{15}$ eV and the `ankle' above $10^{18}$ eV. An important question is whether the highest energy particles are of extra-galactic origin and, if so, at what energy the transition occurs. A theme common to all energy ranges is use of nuclear abundances as a tool for understanding the origin of the cosmic radiation.