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SAS-2 observations of celestial diffuse gamma radiation above 30 MeVThe small astronomy satellite, SAS-2, used a 32-deck magnetic core digitized spark chamber to study gamma rays with energies above 30 MeV. Data for four regions of the sky away from the galactic plane were analyzed. These regions show a finite, diffuse flux of gamma rays with a steep energy spectrum, and the flux is uniform over all the regions. Represented by a power law, the differential energy spectrum shows an index of 2.5 + or - 0.4. The steep SAS-2 spectrum and the lower energy data are reasonably consistent with a neutral pion gamma-ray spectrum which was red-shifted (such as that proposed by some cosmological theories). It is concluded that the diffuse celestial gamma ray spectrum observed presents the possibility of cosmological studies and possible evidence for a residual cosmic ray density, and supports the galactic superclusters of matter and antimatter remaining from baryon-symmetric big bang.
Document ID
19750017753
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Thompson, D. J.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Fichtel, C. E.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Kniffen, D. A.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Hartman, R. C.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 8, 2013
Publication Date
November 1, 1974
Publication Information
Publication: ESRO The Context and Status of Gamma Ray Astronomy
Subject Category
Space Radiation
Accession Number
75N25825
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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