Performance of advanced Ge-spectrometer for nuclear astrophysics

Pierre Jean; Peter von Ballmoos; Gilbert Vedrenne; B. J. Teegarden; Juan E. Naya

doi:10.1117/12.254018

18 October 1996 Performance of advanced Ge spectrometer for nuclear astrophysics

Pierre Jean, Peter von Ballmoos, Gilbert Vedrenne, B. J. Teegarden, Juan E. Naya

Proceedings Volume 2806, Gamma-Ray and Cosmic-Ray Detectors, Techniques, and Missions; (1996) https://doi.org/10.1117/12.254018
Event: SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, 1996, Denver, CO, United States

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.

Citation Download Citation

Pierre Jean, Peter von Ballmoos, Gilbert Vedrenne, B. J. Teegarden, and Juan E. Naya "Performance of advanced Ge spectrometer for nuclear astrophysics", Proc. SPIE 2806, Gamma-Ray and Cosmic-Ray Detectors, Techniques, and Missions, (18 October 1996); https://doi.org/10.1117/12.254018

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