Optimum shields for space borne gamma-ray spectrometers

Details Optimum shields for space borne gamma-ray spectrometers Optimum shields for space borne gamma-ray spectrometers

Nov 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990spie.1344...40l&link_type=abstract

IN: EUV, X-ray, and Gamma-ray instrumentation for astronomy; Proceedings of the Meeting, San Diego, CA, July 11-13, 1990 (A92-20

Astronomy and Astrophysics

Astronomy

Gamma Ray Astronomy, Gamma Ray Spectrometers, Radiation Shielding, Spaceborne Telescopes, Astronomical Spectroscopy, Background Radiation, Earth Orbital Environments, Electron Radiation

Scientific paper

The optimum choice of a shield for space-borne gamma-ray spectrometers is investigated using Monte Carlo simulations. The results demonstrate that, for a given spectrometer configuration, a 'best' shield thickness exists which optimizes the spectrometer's background noise and increases its sensitivity. Such an optimization is achieved by a good understanding of the background sources of the spectrometer, and it varies from detector to detector and orbit to orbit. In general, a highly eccentric orbit is consistently better than LEO with regard to the leakage photon background. BGO seems to be a better shield material than CsI if multiple site events selection is applied.

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