ISOTOPICALLY ENRICHED GERMANIUM DETECTORS FOR ASTROPHYSICAL GAMMA-RAY SPECTROSCOPY

被引：20

作者：

GEHRELS, N

机构：

[1] Laboratory for High Energy Astrophysics, NASA/Goddard Space Flight Center, Greenbelt

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 1990年 / 292卷 / 02期

关键词：

D O I：

10.1016/0168-9002(90)90408-X

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

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. © 1990.

引用

页码：505 / 516

页数：12

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