RADIOACTIVITY MEASUREMENTS OF GD-153 PELLET SOURCES BY CALORIMETRIC METHODS

被引：2
|
作者：
GENKA, T
IMAHASHI, T
机构：
[1] Japan Atomic Energy Research Institute, Tokai, Ibaraki
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 1992年 / 312卷 / 1-2期
关键词：
D O I：
10.1016/0168-9002(92)90152-T
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
The thermal power generation per 37 MBq (1 mCi) of Gd-153 is 0.839-mu-W. The activity of a sealed Gd-153 source can be determined by absorbing all radiations within a calorimeter to be converted into the thermal power. Sources are sintered pellets (3 mm diameter, 2 mm thickness) of Gd2O3.Al2O3 which are encapsulated in titanium capsules of 7 mm diameter and 10 mm length. A cylindrical radiation absorber made of solid copper having a space in the center for the Gd-153 source is used and the temperature rise of the absorber is measured. Uncertainties are added up to +/- 2.9% for a 3-sigma confidence interval in the final result for the measurement of the activity of an approximately 1.5 GBq (40 mCi) pellet source of Gd-153 in a fully nondestructive way.
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页码：193 / 197
页数：5
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