Abstract:
The HPGe detector efficiency calibration of gas source was made by mixing the reference standard source, and the filling material is lightweight sponge and the small voxel partition method was used. The
88Kr of radiochemical purity from
235U fission products was quickly extracted using activated carbon cryogenic absorption method, and was made into a gas sealed source. The
88Kr of radiochemical purity was measured by the calibrated HPGe detector. Using the radioactive temporary balance principle, the
88Kr activity was deduced from the
88Rb activity, which is the decay daughter of
88Kr. The absolute branching ratios of
88Kr were gotten through calculation. Compared with the evaluation value, the uncertainty of data decreases significantly.
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