@inproceedings{oai:repo.qst.go.jp:00054437,
 author = {鄭, 建 and 田上, 恵子 and 内田, 滋夫 and 鄭 建 and 田上 恵子 and 内田 滋夫},
 book = {Proceedings of the 14th Workshop on Environmental Radiactivity},
 month = {Dec},
 note = {Radioactive Cs isotopes are high yield fission products up to 6.535% and 6.236% for 135Cs and 137Cs, respectively, from thermal neutron fission of 235U. They can be released into the environment in nuclear events like the detonation of a nuclear weapon or nuclear reactor accident. In the fission chains for 135Cs and 137Cs, a shielding of 135Cs occurs due to neutron capture of its precursor, 135Xe, to form 136Xe, whereas production of 137Cs is unaffected. This process causes a high degree of variance of 135Cs/137Cs isotope ratio with source. Thus, the ratio of 135Cs/137Cs will be characteristic of the reactor operation and shutdown conditions. In addition, the isotope ratio of 135Cs/137Cs is very important in many aspects in radioecological studies, including source identification of radioactive contamination, dispersion modeling of fission products in the environment after a nuclear accident, long-term estimation of environmental behavior of Cs, and development of accurate sediment geochronology.},
 pages = {359--364},
 title = {Exploring analytical potential of ICP-MS for the determination of radioactive Cs isotopes},
 volume = {13},
 year = {2013}
}