1991
DOI: 10.1007/bf02039578
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Distribution of global fallout237Np, Pu isotopes, and241Am in lake and sea sediments

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Cited by 20 publications
(10 citation statements)
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“…4. These Pu inventories, like the 239+240 Pu activities, were significantly lower than those of Lake Tamogi, Takahoko, Ichiyanagi, Kugushi,Mikata, Bq/m 2 ) (Yamamoto et al, 1991;Ueda et al, 2004;Ueda et al, 2009). A possible explanation for this difference was that the previously investigated lakes mentioned above were located at 40-50 ºN and they received greater amount of Pu isotopes from global fallout (ca.…”
Section: Geochemical Behaviors and Source Identification Of Pu Isotopmentioning
confidence: 78%
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“…4. These Pu inventories, like the 239+240 Pu activities, were significantly lower than those of Lake Tamogi, Takahoko, Ichiyanagi, Kugushi,Mikata, Bq/m 2 ) (Yamamoto et al, 1991;Ueda et al, 2004;Ueda et al, 2009). A possible explanation for this difference was that the previously investigated lakes mentioned above were located at 40-50 ºN and they received greater amount of Pu isotopes from global fallout (ca.…”
Section: Geochemical Behaviors and Source Identification Of Pu Isotopmentioning
confidence: 78%
“…The activities of 239+240 Pu in Japanese lakes (Lake Obuchi, Kizaki, Kugushi, Ichiyanagi, Towada, Tamogi, and Takahoko) have been investigated and overall ranged from 0.02 to 7.00 Bq/kg before the FDNPP accident (Yamamoto et al, 1991;Nagao et al, 1999;Ueda et al, 2004Ueda et al, , 2009Zheng and Yamada, 2005). Clearly, the analytical results for 239+240 Pu activities (0.001-0.307 Bq/kg) in Lake Inba were within the range of the expected preexisting level.…”
Section: Geochemical Behaviors and Source Identification Of Pu Isotopmentioning
confidence: 83%
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“…The 239,240 Pu/ 137 Cs activity ratio of 0.018 and 238 Pu/ 137 Cs activity ratio of 0.00068 the representative value of global fallout in soil were determined by Bunzl and Kracke in 1988 [21]. The 239,240 Pu/ 137 Cs activity ratio of 0.12 to 0.28 was found in the marine and lake sediments as the source of global fallout [17]. The 239,240 Pu/ 137 Cs activity ratio for the Chernobyl accident releases was observed to be 6.8 in the mushroom sampled in the 30km zone of the Chernobyl NPP [18].…”
Section: Introductionmentioning
confidence: 99%
“…The half-life of cesium-137 is relatively short (30.1y), nevertheless it is still possible to use this radionuclide for identification of source of the contamination. The main source of this isotope in the environment were the Chernobyl accident and nuclear weapon testing [17]- [20]. The 239,240 Pu/ 137 Cs activity ratio of 0.018 and 238 Pu/ 137 Cs activity ratio of 0.00068 the representative value of global fallout in soil were determined by Bunzl and Kracke in 1988 [21].…”
Section: Introductionmentioning
confidence: 99%