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Proceedings Paper

Optimum shields for spaceborne gamma-ray spectrometers
Author(s): Fan Lei; P. J. Knight; Anthony J. Dean; Philippe Durouchoux; Pierre Wallyn
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Paper Abstract

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.

Paper Details

Date Published: 1 November 1990
PDF: 7 pages
Proc. SPIE 1344, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy, (1 November 1990); doi: 10.1117/12.23279
Show Author Affiliations
Fan Lei, Univ. of Southampton (United Kingdom)
P. J. Knight, Univ. of Southampton (United Kingdom)
Anthony J. Dean, Univ. of Southampton (United Kingdom)
Philippe Durouchoux, CEN Saclay (France)
Pierre Wallyn, CEN Saclay (France)

Published in SPIE Proceedings Vol. 1344:
EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy
Oswald H. W. Siegmund; Hugh S. Hudson, Editor(s)

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