CSI(TL)-PHOTODIODE DETECTORS FOR SPECTROSCOPY AT LOW RADIATION-LEVELS

被引:14
作者
KOTTHAUS, R
机构
[1] Max-Planck-Institut für Physik, Werner-Heisenberg-Institut, Munich
关键词
D O I
10.1016/0168-9002(93)91278-U
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
Some aspects of CsI(Tl)-photodiode detectors relevant for applications in low level radiation spectroscopy in the MeV energy range have been studied with a view to a sensitive search for the lepton number violating neutrinoless double beta decay of Mo-100. Energy resolutions of slightly less than 100 keV (FWHM), limited by electronic noise, have been obtained for crystal masses up to more than 3 kg. The improved energy resolution facilitates a very sensitive investigation of crystal contaminations with nuclides of the Th and U chains by spectroscopic analysis of alpha-decays. The cleanest crystal was free of U and Th contaminations at the detection limit of 0.27 alpha-decays per kg and h, a radiopurity well sufficient for applications in low level spectroscopy.
引用
收藏
页码:433 / 439
页数:7
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