Cosmic Flux of Low Energy Gamma Rays

Details Cosmic Flux of Low Energy Gamma Rays Cosmic Flux of Low Energy Gamma Rays

Dec 1971

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1971ap%26ss..14..473d&link_type=abstract

Astrophysics and Space Science, Volume 14, Issue 2, pp.473-479

Astronomy and Astrophysics

Astrophysics

8

Scientific paper

Measurements have been made on the cosmic gamma rays of energy between 0.25 and 4.2 MeV from a balloon experiment made near the geomagnetic equator using a collimated 7.6 cm×7.6 cm NaI(T1) crystal assembly. The depth-intensity curves obtained were used to estimate the contribution due to the diffuse cosmic gamma rays in the above energy interval; an unfolding of the counting rates was then performed to obtain the energy spectrum. It is found that a power law fitted to the present data points has a spectral index of -1.8±0.2. A critical examination is then made of all the observational data between 1 keV and 100 MeV to deduce information on the spectral shape in this energy region. Upper limits on low energy gamma ray fluxes from Sco X-1 and the Galactic centre region are also reported.

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