Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...248.1194l&link_type=abstract
Astrophysical Journal, Part 1, vol. 248, Sept. 15, 1981, p. 1194-1201.
Astronomy and Astrophysics
Astrophysics
13
Atmospheric Radiation, Balloon-Borne Instruments, Cosmic Rays, Diffuse Radiation, Gamma Rays, Particle Telescopes, Background Radiation, Energy Spectra, Gamma Ray Spectra, Radiation Detectors, Texas, Upper Atmosphere
Scientific paper
Balloon-borne measurements of the atmospheric and diffuse gamma-ray flux in the energy range 0.4-7.0 MeV with a Compton telescope, which included pulse-shape discrimination of the first scattering detector and a time-of-flight system between the first and second detector elements, are reported. Comparison of the diffuse cosmic gamma-ray flux to the atmospheric gamma rays indicates that 0.2-5.0 MeV is the optimum energy range for measurements made at the top of the earth's atmosphere. The measured total atmospheric gamma-ray flux between zero and 40 deg has an energy spectrum that agrees with the calculations of Ling (1975). Observations indicate that the ratio of the diffuse to atmospheric gamma ray fluxes at 3.5 g/sq cm is a maximum, about 1.0, between 0.7 and 3.0 MeV.
Friling L. A.
Hsieh L.
Lockwood John A.
Macri John
Webber William R.
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