USE OF A TOTAL ABSORPTION GAMMA-RAY SPECTROMETER TO MEASURE GROUND-STATE BETA-BRANCHING INTENSITIES

被引：29
|
作者：
GREENWOOD, RC
STRUTTMANN, DA
WATTS, KD
机构：
[1] Idaho National Engineering Laboratory, EG and G Idaho, Inc., Idaho Falls
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 1992年 / 317卷 / 1-2期
关键词：
D O I：
10.1016/0168-9002(92)90607-6
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
A method has been developed to measure ground-state beta--branching intensities with the total absorption gamma-ray spectrometer at the INEL ISOL facility. This spectrometer, which is used to measure beta-feeding (or beta-strength) distributions to excited states in neutron-rich fission-product nuclei, consists of a 25.4 cm diameter x 30.5 cm long well-type NaI(Tl) scintillation detector together with a Si beta- detector located in the collection-tape transport line in the well. With this spectrometer operating in the beta-gamma coincidence mode as a 4-pi-gamma-beta detector, ground-state beta--branching intensities are obtained from simple ratios of beta-gamma coincidence to beta-singles count rates together with additional, generally small, correction terms. Results obtained for Rh-106, Cs-138-141, Ba-141-142, La-142-145 and Ce-145 are presented and compared with existing data obtained with conventional nuclear spectroscopic methods.
引用
收藏
页码：175 / 184
页数：10
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