WEKO3
アイテム
Characterization of Pu concentration and its isotopic composition in a reference fallout material
https://repo.qst.go.jp/records/69803
https://repo.qst.go.jp/records/6980371d011f6-e7e6-41a7-9dd6-c49d558983a4
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2009-07-21 | |||||
| タイトル | ||||||
| タイトル | Characterization of Pu concentration and its isotopic composition in a reference fallout material | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_c94f | |||||
| 資源タイプ | conference object | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Zhang, Yongsan
× Zhang, Yongsan× Zheng, Jian× Yamada, Masatoshi× Wu, Fengchang× Igarashi, Yasuto× Hirose, Katsumi× 張 永三× 鄭 建× 山田 正俊 |
|||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Since there is no reference material for fallout radioactivity monitoring, prepare such a reference material is necessary for quality control of fallout radionuclides analysis for atmospheric environmental studies. In this work, we report the characterization of Pu activity and its isotopic composition in a fallout reference material prepared by Meteorological Research Institute (MRI), Japan, which was collected at 14 stations throughout Japan in 1963-1979, with reference values of 137Cs, 90Sr and 239+240Pu activities. We analyzed the activities of 239+240Pu and 241Pu, and the atom ratios of 240Pu/239Pu and 241Pu/239Pu using an isotope dilution sector-field inductively coupled plasma mass spectrometry (SF-ICP-MS). The 239+240Pu activities in this fallout material using acid leaching and total digestion were 6.56 +/- 0.10 mBq/g and 6.79 +/- 0.08 mBq/g, respectively. Atom ratios of 240Pu/239Pu were 0.1915 +/- 0.0015 and 0.1922 +/- 0.0022, respectively. Both 240Pu/239Pu and 241Pu/239Pu atom ratios were slightly higher than those of global fallout, which could be attributed to the deposition of fallout radionuclides resulted from the Chinese nuclear weapons tests conducted in the 1970s. The dominant host phases of 239+240Pu were found to be organic matter-sulfides (70 %) with a relative high 240Pu/239Pu atom ratio, and Fe-Mn oxides (19 %) using a sequential extraction method. | |||||
| 会議概要（会議名, 開催地, 会期, 主催者等） | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | The Fifth International Symposium on Radiation Safety and Detection Technology (ISORD-5) | |||||
| 発表年月日 | ||||||
| 日付 | 2009-07-17 | |||||
| 日付タイプ | Issued | |||||
