Suggested modification of the fundamental parameter method: A Case study to calculate the optimum absolute intensity of 1001.03 keV gamma-ray transition
Ebaid, Ashraf E. M. Khater and Y. Y. . 2018
Due to the relative simplicity of gamma-ray spectrometry, it is an effective tool for 238U analysis using 1001.03 keV gamma-ray transition of 234mPa in various matrices. Nowadays, the commonly used absolute intensity (I %) value (0.847±0.008 %) could lead to an overestimation of 238U activity concentration. The most recent published values, 2017, are 1.037 ± 0.052 % and 1.067 ± 0.084 % using the absolute efficiency method (AEM) and fundamental parameter method (FPM), respectively. This work aims to suggest modification on fundamental parameter method (MFPM) and consequently to re-evaluate I% using certified uranium ore samples, 226Ra point source and gamma-ray spectrometers based on hyper pure germanium detector. The newly confirmed I % of 1001.03 keV is 1.0164±0.0636.
Keywords: 238U; modified fundamental parameter method; absolute intensity; 1001 keV gamma-ray transition; gamma-ray spectrometer
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