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On the theory of Gamma Ray Amplification through Stimulated Annihilation Radiation (GRASAR).

Author
Mckinley, J. M.
Published
Nov 1, 1981.
Physical Description
1 electronic document
Additional Creators
Jones, F. C. and Ramaty, R.
Online Version

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Unclassified, Unlimited, Publicly available.
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Summary
The theory of photon emission, absorption, and scattering in a relativistic plasma of positrons, electrons, and photon was studied. Expressions for the emissivities and absorption coefficients of pair annihilation, pair production, and Compton scattering are given and evaluated numerically. The conditions for negative absorption were investigated. In a system of photons and e(+) - e(-) pairs, an emission line at at approximately 0.43 MeV can be produced by grasar action provided that the pair chemical potential exceeds approximately 1 MeV. At a temperature of approximately 10 to the 9th power. This requires a pair density approximately 10 to the 30th power cm to the (-3) power a value much larger than the thermodynamic equilbrium pair density at this temperature. This emission line could account without a gravitational redshift for the observed lines at this energy from gamma ray bursts.
Other Subject(s)
Collection
NASA Technical Reports Server (NTRS) Collection.
Note
Document ID: 19820012237.
Accession ID: 82N20111.
NASA-TM-83857.
Terms of Use and Reproduction
No Copyright.
View MARC record | catkey: 15716720