Radiation spectrum of optically thin relativistic electron-positron plasma

Details Radiation spectrum of optically thin relativistic electron-positron plasma Radiation spectrum of optically thin relativistic electron-positron plasma

Jun 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983ap%26ss..93..229a&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 93, no. 2, June 1983, p. 229-245.

Astronomy and Astrophysics

Astronomy

13

Electron Plasma, Electron-Positron Plasmas, Gamma Ray Astronomy, High Energy Interactions, Plasma Spectra, Positron Annihilation, Relativistic Plasmas, Bremsstrahlung, High Temperature Plasmas, Maxwell-Boltzmann Density Function, Optical Thickness

Scientific paper

An analysis is undertaken of the annihilation spectrum of isotopically distributed monoenergetic electrons and positrons, and convenient analytical expressions for the radiation spectra of a hot Maxwellian e(+)-e(-) plasma are established. Attention is given to the radiation spectrum at positron annihilations having energies greater than 1 keV. In light of the investigation of Crannel et al (1976), the consideration of the positrons in the free state only, while neglecting the formation of positronium prior to annihilation, is justified for the case of plasma temperatures lower than one million K. It is noted that the spectrum calculated corresponds to that of an optically thin plasma, in which transport effects are not significant.

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