The evaluation of the 1001.03 keV gamma emission absolute intensity using fundamental parameter method

Journal Article

Y.Y, Khater, A.E.M., Ebaid, . 2017

• المجلة \ الصحيفة: Journal of Environmental Radioactivity

مستخلص المنشور

The accurate evaluation of the absolute intensity (I%) of the gamma-ray transition 1001.03 keV of 234mPa is crucial for accurate determination of 238U in nuclear material and environmental samples. Over the last decades, a wide range of 1001.03 keV absolute intensity values were published by different researchers and ranged from 0.59 to 1.12 %. Nowadays, one of the most commonly used values is 0.847±0.008 % that seems not accurate and would eventually lead to an overestimation of 238U activity concentration. The absolute intensity of 1001.03 keV gamma transition was re-evaluated using different fundamental parameter method (FPM) modes, uranium ore and granite samples, samples’ geometries, sample-to-detectors’ geometries and gamma ray spectrometers. The mean ± standard deviation of newly optimized absolute intensity value is 1.067 ± 0.083 % with an average relative bias of - 20 % from the commonly used value.