The Production of Cosmic Gamma Rays in Cosmic-ray Collisions PDF Download

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The Production of Cosmic Gamma Rays in Cosmic-ray Collisions

The Production of Cosmic Gamma Rays in Cosmic-ray Collisions PDF Author: Floyd William Stecker
Publisher:
ISBN:
Category : Gamma ray sources
Languages : en
Pages : 23

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Book Description
The annihilations of free electrons and positrons and of positronium are discussed and cross sections are given. Positronium formation under astrophysical conditions is then discussed. A general formula is then derived that gives the gamma-ray spectrum from the annihilation of cosmic-ray positions in terms of the positron source spectrum, energy loss rate, and annihilation cross section gives as functions of energy. The gamma-ray spectrum from the annihilation of thermal positions is calculated, and the gamma-ray intensity from secondary positrons is determined.