PARAMETRIC NORMALIZATION FOR FULL-ENERGY PEAK COUNT RATES OBTAINED AT DIFFERENT GEOMETRIES

被引:7
作者
TIAN, WZ
NI, BF
WANG, PS
PENG, LX
机构
来源
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY-ARTICLES | 1993年 / 170卷 / 01期
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中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
The ''Effective Interaction Depth (EID)'' law has been systematically studied and applied to parametric normalization for peak count rates obtained at different source-detector distances (S-D). The errors caused by EID normalization are less than 4% over the full range of S-D(from infinity to several mm) for true coincidence-free gamma-rays. Parametric corrections for the true coincidence (summing) effect are also established, based on simplified decay schemes and P/T ratio determinations. The total response of Ge detector for single-energy gamma-rays (T) is clearly defined with scattering contributions from surroundings included. Errors from summing effect corrections are also less than 4%. The combined EID normalization and summing effect corrections give an error no greater than 5.7% for the worst situations (several mm S-D and cascade-crossover decay scheme), acceptable for most practical K0 NAA.
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页码:27 / 42
页数:16
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