| Liu Guangshan,Huang Yipu,Cai Yihua,Chen Min. 2002. Non-destructive γ spectrum analysis of polymetallic nodules from the eastern Pacific. Acta Oceanologica Sinica, (3):373－384 |
| Non-destructive γ spectrum analysis of polymetallic nodules from the eastern Pacific |
| Non-destructive γ spectrum analysis of polymetallic nodules from the eastern Pacific |
| Received:March 26, 2002 Revised:April 15, 2002 |
| DOI： |
| Key words:The eastern Pacific polymetallic nodule radionuclide γ-spectrometry |
| 中文关键词: The eastern Pacific polymetallic nodule radionuclide γ-spectrometry |
| 基金项目:This study was supported by the National Scientific; Technological Project of China in the "Ninth-Five Year Plan" under contract No. DY95-02-15. |
| Author Name | Affiliation | | Liu Guangshan | Department of Oceanography, Xiamen University, Xiamen 361005, China | | Huang Yipu | Department of Oceanography, Xiamen University, Xiamen 361005, China | | Cai Yihua | Department of Oceanography, Xiamen University, Xiamen 361005, China | | Chen Min | Department of Oceanography, Xiamen University, Xiamen 361005, China |
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| Abstract: |
| Non-destructive γ spectrum analyses of 20 polymetallic nodules from the eastern Pacific were carried out. Numerous nuclides, such as 238U, 230Th, 226Ra, 210Pb, 208Ra, 228Th, 235U, 227Ac (or 231Pa) and 40K were detected. The count rates of the nuclides in the top or bottom side of nodules facing detector were measured and the ratio R of the count rates of nuclides in the top and the bottom sides was obtained. From counts and ratios, some useful information relating to the growth and movement of the nodules, the source of nuclide and relationship between those and environment can be gotten. A new method for clear distinction between the top and bottom sides of the nodule based on the R value of 226Ra or 210Pb was developed. In addition, one can infer the turnover of nodules according to the R value of 230Th. |
| 中文摘要: |
| Non-destructive γ spectrum analyses of 20 polymetallic nodules from the eastern Pacific were carried out. Numerous nuclides, such as 238U, 230Th, 226Ra, 210Pb, 208Ra, 228Th, 235U, 227Ac (or 231Pa) and 40K were detected. The count rates of the nuclides in the top or bottom side of nodules facing detector were measured and the ratio R of the count rates of nuclides in the top and the bottom sides was obtained. From counts and ratios, some useful information relating to the growth and movement of the nodules, the source of nuclide and relationship between those and environment can be gotten. A new method for clear distinction between the top and bottom sides of the nodule based on the R value of 226Ra or 210Pb was developed. In addition, one can infer the turnover of nodules according to the R value of 230Th. |
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