Assessment of background radiation effects in low energy gamma-ray astronomy

Details Assessment of background radiation effects in low energy gamma-ray astronomy Assessment of background radiation effects in low energy gamma-ray astronomy

Jul 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977esasp.124..327d&link_type=abstract

In ESA Recent Advan. in Gamma-Ray Astronomy p 327-338 (SEE N78-11899 02-88)

Astronomy and Astrophysics

Astronomy

Astronomy, Background Radiation, Gamma Rays, Radiation Effects, Cosmic Rays, Crystals, Germanium, Radioactivity, Scintillation Counters, Spacecraft Construction Materials, Spallation, Trapped Particles

Scientific paper

Background radiation produced in detector and spacecraft materials by the interactions of cosmic rays and trapped protons must be understood and minimized in the full potential of gamm-ray astronomy in the photon energy range 20 keV to 20 MeV MeV. Calculation schemes for assessing radioactivity induced in detector crystals have been developed and are being improved by comparisons with monoenergetic irradiation results at 600 MeV, 800 MeV, and 6 GeV. Application of these calculations to results from the OSO satellites shows that the induced activity can be well explained by spallation interactions of primary protons. Results from Apollos 15 to 17 and Apollo-Soyuz show that for heavy spacecraft, secondary neutrons can significantly enhance the background. Results from these missions also provide important information concerning gamma-ray lines and continuum produced in the spacecraft and detector housing. Spallation calculations are also being performed for germanium.

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