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Measurement of absolute gamma-ray emission probabilities from decay of 138Xe

机译：138Xe衰减引起的绝对伽马射线发射概率的测量

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The fission gaseous 138Xe products play an important role in the research of nuclear-reaction products and radioisotope applications. Therefore, precise data for emission probabilities of gamma-ray from decay of 138Xe are highly desired. However, a high precision is not achievable with a sufficient accuracy due to the limitations of the usual experimental techniques. In this paper, after the homogeneous sources of 138Xe-138Cs were prepared, the activity of 138Xe was obtained by the decay relationship between 138Xe and 138Cs using a HPGe detector. The full-energy peak efficiencies of gamma-ray for 138Xe and 138Cs were accurately calibrated using many activity standard sources and self-absorption was corrected. As a result, the absolute emission probabilities of the 258.4, 434.6 and 1768.3keV gamma-ray from decay of 138Xe were determined to be 34.9(10)%, 22.2(6)% and 18.8(5)%, respectively.
机译：裂变气态138Xe产物在核反应产物和放射性同位素应用的研究中起着重要作用。因此，非常需要用于138Xe衰减的伽马射线发射概率的精确数据。但是，由于常规实验技术的局限性，无法以足够的精度获得高精度。本文制备了138Xe-138Cs的同质源后，使用HPGe检测器通过138Xe和138Cs之间的衰减关系获得138Xe的活性。 138Xe和138Cs的伽马射线全能峰值效率已使用许多活动标准源进行了精确校准，并校正了自吸收。结果，由138Xe衰减引起的258.4、434.6和1768.3keV伽马射线的绝对发射概率分别确定为34.9（10）％，22.2（6）％和18.8（5）％。

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