Performances of gamma ray measurement using bismuth germanate detector after thermal neutron bombardment

✍ Scribed by Cheng-Jong Lee; Chien Chung

• Publisher: Elsevier Science
• Year: 1991
• Weight: 354 KB
• Volume: 42
• Category: Article
• ISSN: 0883-2889
• DOI: 10.1016/0883-2889(91)90176-2

✦ Synopsis

Performance of a 3.8 x 3.8 cm BGO detector used as a gamma ray spectrometer was tested after thermal neutron bombardment. The drift of photopeak channel as well as change of absolute counting efficiency and photopeak energy resolution became severe as the BGO detector was bombarded with thermal neutrons to 1013 nth/cm 2. Irradiation with thermal neutrons beyond 10 ~5 nth/cm 2 disabled the BGO detector as a gamma ray spectrometer due to the intense interference from internal radioactivity induced by neutron reactions.