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Proceedings Paper

Performance of advanced Ge-spectrometer for nuclear astrophysics
Author(s): Pierre Jean; Peter von Ballmoos; Gilbert Vedrenne; B. J. Teegarden; Juan E. Naya
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Paper Abstract

Model calculations for a next generation telescope for high resolution gamma-ray spectroscopy are presented: the sensitivity for narrow lines is based on estimates of the background level and the detection efficiency. The instrumental background rates (continuum and lines) are explained as a sum of various components that depend on cosmic-ray intensity and spectrometer characteristics (e.g. mass distribution around the Ge detectors, passive material, characteristics of the detection system and background reduction techniques). Extended background calculations have been performed both with Monte-Carlo simulations and using empirical, semi-empirical and calculated neutron and proton cross-sections. In order to improve the spectrometer sensitivity several design and background reduction techniques (shield thickness, passive material, active or passive coded mask, enriched or natural Ge detectors) have been compared for an instrument with a fixed detector volume.

Paper Details

Date Published: 18 October 1996
PDF: 15 pages
Proc. SPIE 2806, Gamma-Ray and Cosmic-Ray Detectors, Techniques, and Missions, (18 October 1996); doi: 10.1117/12.254018
Show Author Affiliations
Pierre Jean, Ctr. d'Etude Spatiale des Rayonnements (France)
Peter von Ballmoos, Ctr. d'Etude Spatiale des Rayonnements (France)
Gilbert Vedrenne, Ctr. d'Etude Spatiale des Rayonnements (France)
B. J. Teegarden, NASA Goddard Space Flight Ctr. (United States)
Juan E. Naya, NASA Goddard Space Flight Ctr. and Universities Space Research Association (United States)

Published in SPIE Proceedings Vol. 2806:
Gamma-Ray and Cosmic-Ray Detectors, Techniques, and Missions
Brian D. Ramsey; Thomas A. Parnell, Editor(s)

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