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Appl Radiat Isot. 2013 Oct;80:56-60. doi: 10.1016/j.apradiso.2013.06.006. Epub 2013 Jun 15.

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

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  • 1Northwest Institute of Nuclear Technology, Xi'an 710024, China.


The fission gaseous (138)Xe 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 (138)Xe 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 (138)Xe-(138)Cs were prepared, the activity of (138)Xe was obtained by the decay relationship between (138)Xe and (138)Cs using a HPGe detector. The full-energy peak efficiencies of gamma-ray for (138)Xe and (138)Cs 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 1768.3 keV gamma-ray from decay of (138)Xe were determined to be 34.9(10)%, 22.2(6)% and 18.8(5)%, respectively.

Copyright © 2013 Elsevier Ltd. All rights reserved.


Activity; Decay relationship; Full-energy peak efficiency; Gamma-ray emission probabilities; HPGe detector; Xenon-138 and Cesium-138

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