Atmospheric gamma ray angle and energy distributions from 2 to 25 MeV

Details Atmospheric gamma ray angle and energy distributions from 2 to 25 MeV Atmospheric gamma ray angle and energy distributions from 2 to 25 MeV

Sep 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977jgr....82.3593r&link_type=abstract

Journal of Geophysical Research, vol. 82, Sept. 1, 1977, p. 3593-3601.

Physics

11

Atmospheric Radiation, Energy Spectra, Gamma Rays, Spectral Energy Distribution, Balloon-Borne Instruments, Compton Effect, Spectroscopic Telescopes

Scientific paper

Results are given for gamma ray fluxes in six energy intervals from 2-25 MeV and five zenith angle intervals from 0-50 deg (downward moving) and five from 130-180 deg (upward moving). Observations were obtained with the University of California, Riverside double Compton scatter gamma ray telescope flown on a balloon to a 3.0 g/sq cm residual atmosphere at a geomagnetic cuttoff of 4.5 GV. It was found that the angular distribution of downward moving gamma rays is relatively flat, increasing slowly from 10-40 deg. The angular distribution of the upward moving gamma rays at 4.2 g/sq cm increases with angle from the vertical. Energy distributions of upward and downward moving gamma rays are in good agreement with the results of previous studies.

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