Determination of 239,240Pu in seawater
- 標題
- Determination of 239,240Pu in seawater
- 作者
- T. Nakanishi, M. Yajima, M. Senaga, M. Takei, A. Ishikawa, K. Sakamoto, M. Sakanoue
- 文件屬性
- 國外期刊
- 知識分類
- 基礎研究
- 刊名
- Nuclear Instruments and Methods in Physics Research
- 點閱數
- 2500
摘要
In order to be able to predict the fate and pathways of plutonium dispersed on the ocean, the concentration of239,240 Pu in surface and deep seawaters collected during cruises from 1976 to 1982 in areas suchas the Pacific Ocean were determined by the Japanese reference procedure. 236 Pu and 242 Pu, calibrated by reference to a standardized 241 Am solution, were used as yield tracers and in view of the correction necessary for 236 Pu decay, the half-life of 236 Pu was redetermined by preparing synthetic mixtures such as 236Pu + 239, 240Pu and measuring the decrease in the 236Pu/239,240Pu alpha-activity ratio by alpha-spectrometry.