宇宙射线产生的正电子

IF 1.4 4区物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY

JETP Letters Pub Date : 2024-09-03 DOI:10.1134/S0021364024601970

I. M. Dremin, D. O. Chernyshov

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引用次数: 0

摘要

研究表明，宇宙射线质子的电磁相互作用为正电子的产生做出了显著贡献。这是由于电子-正电子对产生的能量阈值与强相互作用中先驱产生的阈值相比较低，以及宇宙射线能谱的迅速降低。此外，电磁产生的正电子非常软，因此它们与背景电子的湮灭直接产生了观测到的 511 千伏伽马射线。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Production of Positrons by Cosmic Rays

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Production of Positrons by Cosmic Rays

It is shown that electromagnetic interactions of cosmic ray protons provide a noticeable contribution to positrons production. This is due to a combination of low energy threshold of electron–positron pair creation compared to the thresholds of pion creation in strong interactions and rapid decrease of the cosmic rays energy spectrum. Moreover, the electromagnetically produced positrons are very soft, therefore their annihilation with background electrons directly produces the observed 511 keV gamma-line.

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来源期刊

JETP Letters 物理-物理：综合

CiteScore

2.40

自引率

30.80%

发文量

164

审稿时长

3-6 weeks

期刊介绍： All topics of experimental and theoretical physics including gravitation, field theory, elementary particles and nuclei, plasma, nonlinear phenomena, condensed matter, superconductivity, superfluidity, lasers, and surfaces.