U-238 SPONTANEOUS FISSION-INDUCED BACKGROUND IN NAI SCINTILLATORS

被引：5

作者：

OMORI, M ^{[1
]}

BRAOUDAKIS, G ^{[1
]}

PEAK, LS ^{[1
]}

机构：

[1] UNIV SYDNEY,SCH PHYS,FALKINER HIGH ENERGY DEPT,SYDNEY,NSW 2006,AUSTRALIA

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 1993年 / 329卷 / 1-2期

关键词：

D O I：

10.1016/0168-9002(93)90934-A

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

U-238 spontaneous fission in NaI could be a cause of significant internal background. The observed possible fission event rate is 0.1391+/-0.009/day/10(3) cm3 which appears between 15 MeV and 23 MeV in the gamma energy scale with a large NaI crystal. The direct assay of the U-238 contamination in the NaI crystal, based on the fission rate, is approximately 64 ppb. This estimate is significantly higher than that by alpha counting assuming equilibrium in U-238. The discrepancy may suggest the inadequacy of the assumption.

引用

页码：183 / 187

页数：5

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