Production and measurement of fission product noble gases

被引：3

作者：

Goodwin, Matthew A. ^{[1
,2
]}

Bell, Steven J. ^{[3
]}

Britton, Richard ^{[4
]}

Davies, Ashley, V ^{[1
]}

Abilama, Marc ^{[3
]}

Collins, Sean M. ^{[2
,3
]}

Shearman, Robert ^{[3
]}

Regan, Patrick H. ^{[2
,3
]}

机构：

[1] AWE Aldermaston, Reading RG7 4PR, Berks, England

[2] Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England

[3] Natl Phys Lab, Teddington TW11 0LW, Middx, England

[4] CTBTO, Provis Tech Secretariat, Vienna, Austria

来源：

JOURNAL OF ENVIRONMENTAL RADIOACTIVITY | 2021年 / 238卷

关键词：

Gaseous; Fission; Products; Radioxenon; Radiokrypton; NUCLEAR-DATA SHEETS; SYSTEM; BREAKTHROUGH; DETECTORS;

D O I：

10.1016/j.jenvrad.2021.106733

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Gaseous fission products have been produced via thermal neutron irradiation of a highly-enriched uranium target and extracted using a custom gas processing system for measurement on a prototype, high-resolution beta - gamma coincidence detection system. The gas was extracted and measured in two stages in order to measure the prompt and beta(-) delayed fission products. This paper presents an overview of the system used to produce gaseous fission products, and the results of the advanced coincidence spectrometry techniques used to identify and quantify decays from the radionuclides produced, including the noble gases Kr-85, Kr-85m, Kr-88, Xe-133, Xe-135, Xe-133m and Xe-135m, as well as I-133 and Rb-88. The measurements were validated by determination of the nuclear decay half-lives, specifically for the ground state decay of Xe-135, which was found to be 9.15(49) hours and consistent with the literature value. This work demonstrates the UK capability to produce gaseous radionuclides for quality assurance and calibration purposes in Radionuclide Laboratories supporting the Comprehensive Nuclear-Test-Ban Treaty (CTBT).

引用

页数：8

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