Abstract:
Uncertainty of result for wall effect correction and efficiency calibration was bigger in our previous experiment about
87Kr. In order to solve the problem, the experiment equipment was improved, and wall effect was exactly corrected in present work. Radioactive concentration of
87Kr was measured by internal gas proportional counters, the result is 100.87（1±0.86%） Bq/mL. The source box which can exactly calibrated the efficiency of HPGe detector was designed again. Emission probability of
87Kr 402.6 keV
γ-ray was determined to be 49.46%（1±1.9%）.
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