TEST AND PERFORMANCE OF A BGO COMPTON-SUPPRESSION SHIELD FOR GAMMASPHERE

被引:17
作者
CARPENTER, MP
KHOO, TL
AHMAD, I
JANSSENS, RVF
LAURITSEN, T
ANNAN, GA
BAXTER, AM
BLEICH, ME
HARFENIST, S
MOORE, EF
TORELLI, M
VISSER, DW
机构
[1] AUSTRALIAN NATL UNIV,CANBERRA,ACT,AUSTRALIA
[2] N CAROLINA STATE UNIV,RALEIGH,NC 27695
关键词
D O I
10.1016/0168-9002(94)91645-4
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
Bismuth germanate (BGO) Compton-suppresion shields have been constructed to surround the Ge detectors of the GAMMASPHERE array. A shield consists of six hexagonal tapered BGO elements, each coupled to two 1-in. X 1-in. photomultiplier tubes. In addition, a cylindrical BGO detector is placed behind the Ge detector to intercept the forward scattered gamma-rays. One hundred ten such shields are planned for the GAMMASPHERE array. Procedures for measuring the performance of these shields have been developed. Large (70%) Ge detectors when used with these shields give a peak-to-total ratio of better than 0.60. To date 85 shields have been tested and approved for use in GAMMASPHERE.
引用
收藏
页码:234 / 238
页数:5
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