title: Measurement of absolute gamma-ray emission probabilities from decay of 138Xe.
abstract: 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.
authors.affiliation: Northwest Institute of Nuclear Technology, Xi'an 710024, China. 13572916923@163.com
authors.forename: Feng
authors.initials: F
authors.lastname: Xie
authors.forename: Wengang
authors.initials: W
authors.lastname: Jiang
authors.forename: Xiaobing
authors.initials: X
authors.lastname: He
authors.forename: Xuesong
authors.initials: X
authors.lastname: Li
authors.forename: Zhanyin
authors.initials: Z
authors.lastname: Cheng
authors.forename: Shilian
authors.initials: S
authors.lastname: Wang
authors.forename: Qi
authors.initials: Q
authors.lastname: Li
authors.forename: Quanlin
authors.initials: Q
authors.lastname: Shi
authors.forename: Yongfu
authors.initials: Y
authors.lastname: Chang
keywords: Activity; Decay relationship; Full-energy peak efficiency; Gamma-ray emission probabilities; HPGe detector; Xenon-138 and Cesium-138