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METHODOLOGY FOR THE MEASUREMENT OF BETA-DECAY INTENSITY DISTRIBUTIONS FROM THE ANALYSIS OF TOTAL ABSORPTION GAMMA-RAY SPECTRA

被引：12
作者：
HELMER, RG [1 ]
PUTNAM, MH [1 ]
GREENWOOD, RC [1 ]
WILLMES, H [1 ]
机构：
[1] UNIV IDAHO,DEPT PHYS,MOSCOW,ID 83844
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 1994年 / 351卷 / 2-3期
关键词：
D O I：
10.1016/0168-9002(94)91370-6
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
A total absorption gamma-ray spectrometer (TAGS), based on a 25.4-cm diameter X 30.5-cm long NaI(Tl) well detector, has been developed at the INEL on-line isotope separator facility. A Si detector in the well of the NaI(Tl) detector allows one to collect beta-particle-gated coincidence gamma spectra in addition to singles gamma spectra. From the analysis of these total absorption gamma-ray spectra, beta(-)-decay intensity distributions are obtained. The analysis methodology is based on response functions that simulate the response of the NaI(Tl) detector to the gamma-rays and electrons (including external bremsstrahlung) from a radioactive source in the detector well. These response functions are computed with a Monte Carlo photon and electron transport code. This methodology has been completely upgraded since it was first developed and now provides very good simulations of both singles and coincidence spectra. As an example of the application of this methodology, the I-beta distribution for the decay of Cs-141 is determined from the TAGS spectra.
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页码：406 / 422
页数：17
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