Mathematics – Logic
Scientific paper
May 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aipc..410.1559d&link_type=abstract
The fourth compton symposium. AIP Conference Proceedings, Volume 410, pp. 1559-1566 (1997).
Mathematics
Logic
X- And Gamma-Ray Telescopes And Instrumentation, Gamma-Ray Sources, Gamma-Ray Bursts, Cosmic Rays, Gamma-Ray
Scientific paper
The passive materials inside the SPI BGO shield represent a non negligible fraction of the SPI detection unit total mass, containing many iron-rich materials, if we except the berrylium. The bombardment of the passive materials by the cosmic rays and by their secondaries in the BGO shield produce radioactive unstable nuclei which in turn decay and possibly emit a γ-ray. In this paper we will compute the contribution of various passive materials inside the shield to the SPI background lines. This study will able us then to determinate for each line of astrophysical interest which passive materials should be avoided while conceiving a γ-ray spectrometer, as a potential emitter of this line. It has also enabled us to deduce the less noisy material to be choosen when technological trade off occur.
Albernhe Francis
Collin Michel
Cordier Bertand
Diallo Nene
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