Abstract

The half-life and specific activity of 99Tc were redetermined by measuring the activity of a known weight (determined coulometrically) of 99Tc by a liquid scintillation method and found to be 2·14(±0.·05) × 10 5 years and 3·75(±0·11) × 10 4 disintegration/min per μg respectively. These results are in excellent agreement with previous values.

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