Feasibility of using 236U to reconstruct close-in fallout deposition from the Hiroshima atomic bomb.

Sakaguchi, A ; Kawai, K ; et al.

In: The Science of the total environment, Jg. 408 (2010-10-15), Heft 22, S. 5392

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The first results on the feasibility of using (236)U to reconstruct the level and spatial distribution of close-in fallout deposition from the Hiroshima A-bomb are reported, coupled with the use of global fallout (137)Cs and (239+240)Pu. The results for global fallout (236)U in soil samples (0-30cm) from Ishikawa prefecture showed that the deposition density of (236)U from the global fallout can be accurately evaluated using AMS. All deposited (236)U, (137)Cs and (239+240)Pu appeared to have been recovered using 30-cm cores. It was also noted from the depth profiles for (236)U/(239+240)Pu and (236)U/(137)Cs ratios that the downward behavior of (236)U in the soil was apparently similar to that of (239+240)Pu, while the (137)Cs was liable to be retained in upper layers compared with (236)U and (239+240)Pu. The accumulated levels were 1.78×10(13)atomsm(-2) for (236)U, 4340Bqm(-2) for (137)Cs and 141Bqm(-2) for (239+240)Pu. The ratios of (236)U/(137)Cs and (236)U/(239+240)Pu were (4.10±0.12)×10(9) and (1.26±0.04)×10(11)atomsBq(-1), respectively. Results of (236)U, (137)Cs and (239+240)Pu measurements for the seven soil cores (0-30cm) from Hiroshima were discussed on the basis of ratios of (236)U/(137)Cs and (236)U/(239+240)Pu by comparing with those from the background area in Ishikawa, indicating that the global fallout dominates the current level of (236)U accumulation in soil in the Black-rain area around Hiroshima after the Hiroshima bomb, and the contribution of the close-in fallout (236)U produced by the Hiroshima A-bomb seems difficult to observe.

Titel:	Feasibility of using 236U to reconstruct close-in fallout deposition from the Hiroshima atomic bomb.
Autor/in / Beteiligte Person:	Sakaguchi, A ; Kawai, K ; Steier, P ; Imanaka, T ; Hoshi, M ; Endo, S ; Zhumadilov, K ; Yamamoto, M
Link:	Zum Volltext
Zeitschrift:	The Science of the total environment, Jg. 408 (2010-10-15), Heft 22, S. 5392
Veröffentlichung:	Amsterdam, Elsevier., 2010
Medientyp:	academicJournal
ISSN:	1879-1026 (electronic)
DOI:	10.1016/j.scitotenv.2010.07.073
Schlagwort:	Cesium Radioisotopes analysis Feasibility Studies Japan Plutonium analysis World War II Nuclear Weapons Radiation Monitoring methods Radioactive Fallout analysis Soil Pollutants, Radioactive analysis Uranium analysis
Sonstiges:	Nachgewiesen in: MEDLINE Sprachen: English Publication Type: Journal Article; Research Support, Non-U.S. Gov't Language: English [Sci Total Environ] 2010 Oct 15; Vol. 408 (22), pp. 5392-8. <i>Date of Electronic Publication: </i>2010 Aug 24. MeSH Terms: Nuclear Weapons* ; Radiation Monitoring / methods ; Radioactive Fallout / analysis ; Soil Pollutants, Radioactive / analysis ; Uranium / analysis ; Cesium Radioisotopes / analysis ; Feasibility Studies ; Japan ; Plutonium / analysis ; World War II Substance Nomenclature: 0 (Cesium Radioisotopes) ; 0 (Radioactive Fallout) ; 0 (Soil Pollutants, Radioactive) ; 4OC371KSTK (Uranium) ; 53023GN24M (Plutonium) Entry Date(s): Date Created: 20100828 Date Completed: 20101029 Latest Revision: 20131121 Update Code: 20240513

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