Measurement of 101Tc Half-Life
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Graphical Abstract
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Abstract
75 mg (NH4)6Mo7O24 •4H2O solution was irradiated for 20 min in miniature neutron source reactor (MNSR) and cooled for 12 min. In the conditions of 0.8 mol/L HNO3, phase ratio 1∶1, the solution of 101Tc sample was extracted twice with α-benzoin oxime/ethyl acetate phase to remove 101Mo and a radiochemically pure and carrier-free 101Tc product was obtained. The half-life of 101Tc was accurately measured with a HPGe γ-detector by following 306.8 keV γ-ray about 150 min, and processed the data by three methods, R-value method, iterative method and translation method. Five parallel measurments gave a half-life (14.02± 0.01) min (n=5) for 101Tc.
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