标题： 反质子的光谱强度以及宇宙射线在银河系中的寿命 显示英文标题

标题： Spectral Intensities of Antiprotons and the lifetime of Cosmic Rays in the Galaxy

摘要： 本文指出，由BESS、PAMELA和AMS仪器观测到的银河宇宙射线中反质子的能谱强度，在~1-100 GeV的能量范围内，显示出与初级宇宙射线通过与星系际介质中的物质相互作用产生的能谱形状几乎相同，且未见显著修改。 更重要的是，宇宙射线在银河体积内约2.5±0.7百万年的恒定滞留时间（与宇宙射线能量无关）与观测到的强度相符。 在低于10 GeV的能量范围内，似乎存在一个较小的次级反质子附加成分，这些成分生成于宇宙射线源周围的类似茧状区域。 我们在此背景下讨论了其他次级组分（如正电子和硼）的观测结果，并以关于宇宙射线起源和传播的一般性评论作为结论。 显示英文摘要

摘要： In this paper we note that the spectral intensities of antiprotons observed in Galactic cosmic rays in the energy range ~ 1-100 GeV by BESS, PAMELA and AMS instruments display nearly the same spectral shape as that generated by primary cosmic rays through their interaction with matter in the interstellar medium, without any significant modifications. More importantly, a constant residence time of ~ 2.5 +/-0.7 million years in the Galactic volume, independent of the energy of cosmic rays, matches the observed intensities. A small additional component of secondary antiprotons in the energy below 10 GeV, generated in cocoon-like regions surrounding the cosmic-ray sources, seems to be present. We discuss this result in the context of observations of other secondary components like positrons and Boron, and conclude with general remarks about the origins and propagation of cosmic rays.