| 南海东北部表层沉积物天然放射性核素与137Cs |
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| 引用本文： | 刘广山,黄奕普,陈敏,邱雨生,蔡毅华,高众勇. 南海东北部表层沉积物天然放射性核素与137Cs[J]. 海洋学报, 2001, 23(6): 76-84 |
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| 作者姓名： | 刘广山 黄奕普 陈敏 邱雨生 蔡毅华 高众勇 |
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| 作者单位： | 厦门大学海洋系, 福建, 厦门, 361005 |
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| 基金项目： | 中国大洋矿产资源开发协会"九五"国家专项资助项目(DY95-02-15) |
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| 摘 要： | 用HPGeγ谱仪测定了南海东北部表层沉积物中的放射性核素.结果给出7种核素的平均比活度分别为40K:538Bq/kg,210Pb:116Bq/kg,226Ra:27.7Bq/kg,228Ra:4.49Bq/kg,228Th:42.0Bq/kg,238U:35.4Bq/kg和137Cs:1.16Bq/kg,210Pb的比活度随离岸距离增大,226Ra比活度随离岸距离没有明显变化,其余核素比活度随离岸距离减小.与对我国近海其他海域报道的沉积物放射性核素含量相比,40K和137Cs稍低于其他海域,其余核素为中等水平.
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| 关 键 词： | 南海东北部 沉积物 天然放射性核素 137Cs |
| 文章编号： | 0253-4193(2001)06-0076-09 |
| 收稿时间： | 2000-08-13 |
| 修稿时间： | 2000-08-13 |
Specific activity and distribution of natural radionuclides and 137Cs in surface sediments of the northeastern South China Sea |
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| LIU Guang-shan,HUANG Yi-pu,CHEN Min,QIU Yu-sheng,CAI Yi-hua and GAO Zhong-yong. Specific activity and distribution of natural radionuclides and 137Cs in surface sediments of the northeastern South China Sea[J]. Acta Oceanologica Sinica (in Chinese), 2001, 23(6): 76-84 |
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| Authors: | LIU Guang-shan HUANG Yi-pu CHEN Min QIU Yu-sheng CAI Yi-hua GAO Zhong-yong |
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| Affiliation: | Department of Oceanography, Xiamen University, Xiamen 361005, China |
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| Abstract: | Natural radio nuclides 40K,210,226,228Ra,228Th,238U and 137Cs in surface sediments from the northeastern South China Sea are measured by HPGe γ spectrometer.The mean specific activities of above 7 nuclides are respectively 538,116,27.7,44.9,4210,35.4 and 11.6 Bq/kg.The results show that 210Pb in sediments increases and 226Ra is no variance and others nuclides decrease with distance from coast.By comparison with other China coastal sea areas,the specific activities of 40K and 137Cs are lower and other nuclides are mid-level. |
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| Keywords: | northeastern South China Sea sediment natural radionuclide 137Cs |
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