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Gamma-producing radioactivities from supernovae

Conference · · AIP Conf. Proc.; (United States)
OSTI ID:7068574
The production of three isotopes critical to astronomical ..gamma..-ray spectroscopy, /sup 44/Ti, /sup 56/Co, and /sup 57/Co, is briefly reviewed along with the information each contains. Emphasis is placed on SN 1987A, the only Type II supernova likely to be seen in ..gamma..-lines for decases to come. The 847 keV line from /sup 56/Co decay in this supernova should peak approximately 400 days after its explosion with a flux of about 1 x 10/sup -3/ cm/sup -2/ s/sup -1/. For comparison, the second best candidate, a Type Ia in the Virgo cluster (20 Mpc) gives a peak flux 100 times smaller than this 100 days after the explosion. /sup 57/Co decay in SN 1987A will also present a potentially detectable signal approx.1 x 10/sup -4/ cm/sup -2/ s/sup -1/ in 1989 through 1991. /sup 44/Ti, chiefly from Type I supernovae, is a wild card, but may be responsible for the diffuse pair background.
Research Organization:
Board of Studies in Astronomy and Astrophysics, Lick Observatory, University of California at Santa Cruz, Santa Cruz, CA 95064
OSTI ID:
7068574
Report Number(s):
CONF-871245-
Conference Information:
Journal Name: AIP Conf. Proc.; (United States) Journal Volume: 170:1
Country of Publication:
United States
Language:
English