Preliminary evaluation of 135Cs/137Cs as a forensic tool for identifying source of radioactive contamination

Analysis of cesium isotope compositions in environmental samples by thermal ionization mass spectrometry – 1. A preliminary study for source analysis of radioactive contamination in Fukushima prefecture

“…When studying Cs isotopes by mass spectrometry of Cs, isobaric interferences with Ba must be considered [5][6][7][8][9]. Although a higher filament current would enhance the sensitivity of Cs isotope analysis, the typical filament current both of this study and other reports [5][6][7][8][9] was set to approximately 1 A to avoid the isobaric interference of Ba. The mass spectrum obtained in this study shows no peak at atomic mass of 138 (Figure 1), which indicated that no Ba ion was detected during our measurement.…”

“…Because the generation of radioactive 135 Cs depends on the neutron flux, the isotopic ratio of 135 Cs (T 1/2 = 2.3 × 10 6 ) and 137 Cs is used for analyzing the operations of nuclear facilities [5][6][7][8][9]. This suggests that the isotope ratio analysis of the 135 …”

Application of Mass Spectrometry for Analysis of Cesium and Strontium in Environmental Samples Obtained in Fukushima Prefecture

“…3 10 6 ) is also generated during the operation of reactors. Because of the difference in the generation process and the half-life of radioactive Cs, the isotopic ratios of 134 Cs/ 137 Cs and 135 Cs/ 137 Cs have been used for analyzing the operations of nuclear facilities [2][3][4][5][6]. Naturally occurring Sr has four stable isotopes ( 84 Sr, 86 Sr, 87 Sr, and 88 Sr), on the other hand, and the isotopic composition of Sr generated in reactors [1] are totally different from the natural abundance [7].…”

Ultra-trace determination of 90Sr, 137Cs, 238Pu, 239Pu, and 240Pu by triple quadruple collision/reaction cell-ICP-MS/MS: Establishing a baseline for global fallout in Qatar soil and sediments

“…Mass spectrometry techniques ICP-MS, AMS, RIMS, TIMS, and SIMS have been used for the determination of 135 Cs and 137 Cs (Taylor et al, 2008;Eliades et al, 2013;H€ olgye et al, 2004;Ohno and Muramatsu, 2014;Chao and Tseng, 1996;Zheng et al, 2014a,b;Russell et al, 2014;Suseno and Prihatiningsih, 2014;Hancock et al, 2014;Pibida et al, 2001Pibida et al, , 2004Moreno et al, 1999;Lee et al, 1993;Edgington et al, 1991;Thakur et al, 2013). 137 Cs is a short-lived radionuclide (30.07 years).…”