Criteria for grasar action in astrophysical sourcesThe theory of gamma ray amplification through stimulated annihilation radiation (grasar) was developed by Ramaty, McKinley and Jones. For gamma ray bursts similar to the March 5, 1979 burst, an observed annihilation line of width 0.03 MeV would imply a grasar source. The minimum pair density needed for the onset of grasar action is approx. 10 to the 30th power/cu cm and the peak of the grasar line, without a gravitational redshift, is at 0.5 MeV.
Document ID
19850049172
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Mckinley, J. M. (NASA Goddard Space Flight Center Greenbelt; Maryland, University, College Park, MD, United States)
Ramaty, R. (NASA Goddard Space Flight Center Greenbelt, MD, United States)