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Optimization of Counting Time for Measurement of Ultra-low-level 238U and 232Th by 80% Relative Efficiency HPGe Detector |
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PP: 201-204 |
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doi:10.18576/jrna/050306
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Author(s) |
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Nabanita Naskar,
Susanta Lahiri,
Simran Jandu,
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Abstract |
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| It has been observed that for quantitative measurement of ultra-low-level 238U and 232Th in natural samples, the relative standard deviation (RSD) between the activity values of different photopeaks of the daughter nuclides in the corresponding series is random and large in low counting time and after a certain counting time, the randomness of RSD is minimized. Depending on RSD and relative counting error (RCE), it was observed that the minimum counting time for measurement of ultra-low-level 238U and 232Th by a HPGe detector of 80% relative efficiency is ~60000 s. Different IAEA standards were used for this experiment. |
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