Positrons from accelerated particle interactions
1987; IOP Publishing; Volume: 316; Linguagem: Inglês
10.1086/165244
ISSN1538-4357
AutoresB. Kozlovsky, R. E. Lingenfelter, R. Ramaty,
Tópico(s)Solar and Space Plasma Dynamics
Resumoview Abstract Citations (64) References (74) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Positrons from Accelerated Particle Interactions Kozlovsky, B. ; Lingenfelter, R. E. ; Ramaty, R. Abstract Positron production from the decay of radioactive nuclei produced in nuclear interactions of accelerated particles is treated in detail. Laboratory data as well as theoretical considerations are used to construct energy-dependent cross sections for the production of a large number of radioactive positron emitters resulting from proton and alpha-particle interactions with ambient cosmic matter. Using these cross sections, positron production rates are calculated for a variety of energetic particle spectra, assuming solar abundances for both the energetic particles and the ambient medium. These results can be used for the study of astrophysical sites which emit annihilation radiation. In particular, the results have been applied to solar flares, where the observed 0.511 MeV line is shown to be due to positrons resulting from accelerated particle reactions. Publication: The Astrophysical Journal Pub Date: May 1987 DOI: 10.1086/165244 Bibcode: 1987ApJ...316..801K Keywords: Gamma Rays; Particle Acceleration; Particle Interactions; Particle Production; Positrons; Solar Flares; Calcium; Carbon; Chromium; Iron; Neon; Nickel; Nitrogen; Nuclear Reactions; Oxygen; Radioactive Decay; Nuclear and High-Energy Physics; GAMMA RAYS: GENERAL; NUCLEAR REACTIONS; SUN: FLARES full text sources ADS |
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