当前位置: X-MOL 学术Phys. Rep. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Spallation processes and nuclear interaction products of cosmic rays
Physics Reports ( IF 30.0 ) Pub Date : 1990-08-01 , DOI: 10.1016/0370-1573(90)90109-f
R Silberberg 1 , C H Tsao
Affiliation  

Most cosmic-ray nuclei heavier than helium have suffered nuclear collisions in the interstellar gas, with transformation of nuclear composition. The isotopic and elemental composition at the sources has to be inferred from the observed composition near the Earth. The source composition permits tests of current ideas on sites of origin, nucleosynthesis in stars, evolution of stars, the mixing and composition of the interstellar medium and injection processes prior to acceleration. The effects of nuclear spallation, production of radioactive nuclides and the time dependence of their decay provide valuable information on the acceleration and propagation of cosmic rays, their nuclear transformations, and their confinement time in the Galaxy. The formation of spallation products that only decay by electron capture and are relatively long-lived permits an investigation of the nature and density fluctuations (like clouds) of the interstellar medium. Since nuclear collisions yield positrons, antiprotons, gamma rays and neutrinos, we shall discuss these topics briefly.

中文翻译:

宇宙射线散裂过程和核相互作用产物

大多数比氦重的宇宙射线核都在星际气体中发生了核碰撞,核成分发生了变化。源的同位素和元素组成必须从地球附近观察到的成分推断出来。源成分允许测试当前关于起源地点、恒星核合成、恒星演化、星际介质的混合和成分以及加速之前的注入过程的想法。核散裂的影响、放射性核素的产生及其衰变的时间依赖性为宇宙射线的加速和传播、它们的核转换以及它们在银河系中的限制时间提供了宝贵的信息。散裂产物的形成仅通过电子捕获而衰减并且寿命相对较长,因此可以研究星际介质的性质和密度波动(如云)。由于核碰撞产生正电子、反质子、伽马射线和中微子,我们将简要讨论这些主题。
更新日期:1990-08-01
down
wechat
bug