Optimum shields for spaceborne gamma-ray spectrometers

Fan Lei; P. J. Knight; Anthony J. Dean; Philippe Durouchoux; Pierre Wallyn

doi:10.1117/12.23279

1 November 1990 Optimum shields for spaceborne gamma-ray spectrometers

Fan Lei, P. J. Knight, Anthony J. Dean, Philippe Durouchoux, Pierre Wallyn

Proceedings Volume 1344, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy; (1990) https://doi.org/10.1117/12.23279
Event: 34th Annual International Technical Symposium on Optical and Optoelectronic Applied Science and Engineering, 1990, San Diego, CA, United States

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.

Citation Download Citation

Fan Lei, P. J. Knight, Anthony J. Dean, Philippe Durouchoux, and Pierre Wallyn "Optimum shields for spaceborne gamma-ray spectrometers", Proc. SPIE 1344, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy, (1 November 1990); https://doi.org/10.1117/12.23279

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