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

Authors
CARPENTER MP KHOO TL AHMAD I JANSSENS RVF LAURITSEN T ANNAN GA BAXTER AM BLEICH ME HARFENIST S MOORE EF TORELLI M VISSER DW
Citation
Mp. Carpenter et al., TEST AND PERFORMANCE OF A BGO COMPTON-SUPPRESSION SHIELD FOR GAMMASPHERE, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 353(1-3), 1994, pp. 234-238
Citations number
6
Categorie Soggetti
Nuclear Sciences & Tecnology","Physics, Particles & Fields","Instument & Instrumentation",Spectroscopy
Journal title
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment → ACNP
ISSN journal
01689002
Volume
353
Issue
1-3
Year of publication
1994
Pages
234 - 238
Database
ISI
SICI code
0168-9002(1994)353:1-3<234:TAPOAB>2.0.ZU;2-5
Abstract
Bismuth germanate (BGO) Compton-suppresion shields have been construct ed to surround the Ge detectors of the GAMMASPHERE array. A shield con sists of six hexagonal tapered BGO elements, each coupled to two 1-in. X 1-in. photomultiplier tubes. In addition, a cylindrical BGO detecto r is placed behind the Ge detector to intercept the forward scattered gamma-rays. One hundred ten such shields are planned for the GAMMASPHE RE array. Procedures for measuring the performance of these shields ha ve been developed. Large (70%) Ge detectors when used with these shiel ds give a peak-to-total ratio of better than 0.60. To date 85 shields have been tested and approved for use in GAMMASPHERE.