Preconcentration and separation of 99Tc in groundwater by using TEVA resin |
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| Authors: | Zi-lu Zhang Guo-qing Zhou Jian-feng Lin Yue Ma Xiao-wei Yi |
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| Affiliation: | 1.Department of Environmental Science,University of Calcutta,Kolkata,India;2.Saha Institute of Nuclear Physics,Kolkata,India;3.Chemistry Department,Panjab University,Chandigarh,India |
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| Abstract: | An effort has been made to optimize the counting time for low-level measurement of naturally occurring radioactive material (NORM) by considering the standard deviation between the activity values of different photopeaks and counting error. It is observed that at lower counting time, relative standard deviation (RSD) varies randomly, but attains a gradual trend with increasing time and also comes closure to the counting error. Therefore minimum counting time for low-level NORM measurement of 238U and 232Th would be the time required to stabilize the RSD values. |
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