Swedish Defence Research Agency (FOI), Gulfossgatan 12, SE-164 90 Stockholm, Sweden.
Swedish Defence Research Agency (FOI), Gulfossgatan 12, SE-164 90 Stockholm, Sweden.
J Environ Radioact. 2014 Feb;128:47-63. doi: 10.1016/j.jenvrad.2013.10.027. Epub 2013 Nov 30.
Observations made in April 2013 of the radioxenon isotopes (133)Xe and (131m)Xe at measurement stations in Japan and Russia, belonging to the International Monitoring System for verification of the Comprehensive Nuclear-Test-Ban Treaty, are unique with respect to the measurement history of these stations. Comparison of measured data with calculated isotopic ratios as well as analysis using atmospheric transport modeling indicate that it is likely that the xenon measured was created in the underground nuclear test conducted by North Korea on February 12, 2013, and released 7-8 weeks later. More than one release is required to explain all observations. The (131m)Xe source terms for each release were calculated to 0.7 TBq, corresponding to about 1-10% of the total xenon inventory for a 10 kt explosion, depending on fractionation and release scenario. The observed ratios could not be used to obtain any information regarding the fissile material that was used in the test.
2013 年 4 月，隶属于《全面禁止核试验条约》核查国际监测系统的日本和俄罗斯测量站对放射性氙同位素 (133)Xe 和 (131m)Xe 进行了观测，这些观测在这些测量站的历史上是独一无二的。将测量数据与计算的同位素比值进行比较，并利用大气传输模型进行分析，表明所测量的氙很可能是朝鲜于 2013 年 2 月 12 日进行的地下核试验产生的，并在 7-8 周后释放。需要不止一次释放才能解释所有观测结果。每次释放的 (131m)Xe 源项分别计算为 0.7 TBq，这相当于 10 kt 爆炸的总氙库存量的 1-10%，具体取决于分馏和释放情况。所观察到的比值无法用于获取关于用于试验的可裂变材料的任何信息。
