Isotopically enriched germanium detectors for astrophysical gamma-ray spectroscopy

Details Isotopically enriched germanium detectors for astrophysical gamma-ray spectroscopy Isotopically enriched germanium detectors for astrophysical gamma-ray spectroscopy

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990nimpa.292..505g&link_type=abstract

Nuclear Instruments and Methods in Physics Research Section A, Volume 292, Issue 2, p. 505-516.

Physics

13

Scientific paper

A study is presented of the instrumental background in astrophysical gamma-ray spectrometers using isotopically enriched germanium detectors. Calculations show that the beta-decay background, which is the largest component between ~ 0.1 and 1.0 MeV in balloon-borne and satellite spectrometers, is dominated by the activation of 74Ge. This component can be reduced by an order of magnitude using detectors enriched to > 80% in 70Ge. The predicted reduction in the total background for current balloon-borne instruments is more than a factor of 1.7 between 0.2 and 1.0 MeV. For future satellite instruments, the reduction in this energy range is by more than a factor of 5.

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