| 海洋沉积物岩心放射性核素的γ谱测定 |
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| 引用本文： | 刘广山,陈敏,黄奕普,夏小明,李炎. 海洋沉积物岩心放射性核素的γ谱测定[J]. 厦门大学学报(自然科学版), 2001, 40(3): 669-674 |
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| 作者姓名： | 刘广山 陈敏 黄奕普 夏小明 李炎 |
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| 作者单位： | 1. 厦门大学海洋学系,
2. 国家海洋局第二海洋研究所, |
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| 基金项目： | 国家自然科学基金资助项目(49976023) |
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| 摘 要： | 用HPGeγ谱仪测定了海洋沉积物岩心的天然放射性核素^40K、^210Pb、^226rA、^228tH、^238U和人工放射性核素^137Cs，进行了不同体积样品的效率刻度，对所用直径75mm、高度5－45mm柱形样品几何条件，14种能量的γ射线，用2次多项式拟合效率随样品高度变化的相关系数R^2好于0．98，用内插的不同样品高度的效率值，进行了46．5－1460．5keV能区5－45mm高度样品的效率刻度，测量了一些沉积物岩心并就其中的一个柱样中^40K、^210Pb、^226Ra、^228Ra、^228Th、^238U和^137Cs的深度分布及其所揭示的海洋学意义进行了分析、讨论。
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| 关 键 词： | 沉积物岩心 天然放射性核素 效率制度 γ谱测定 海洋沉积物 |
| 文章编号： | 0438-0479(2001)03-0669-06 |
| 修稿时间： | 2000-12-06 |
Measurement ofRadionuclides in Sediments Core by HPGe |
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| LIU Guang-shan,CHEN min,HUNG Yi-pu,XIA Xiao-ming,LI Yan. Measurement ofRadionuclides in Sediments Core by HPGe[J]. Journal of Xiamen University(Natural Science), 2001, 40(3): 669-674 |
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| Authors: | LIU Guang-shan CHEN min HUNG Yi-pu XIA Xiao-ming LI Yan |
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| Affiliation: | LIU Guang shan 1,CHEN min 1,HUNG Yi pu 1,XIA Xiao ming 2,LI Yan 2 |
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| Abstract: | Natural radionuclides 40K, 210Pb, 226Ra, 228Ra, 228Th, 238U and article 137Cs in sediments core were determined with HPGe γ spectroscopy. The efficiency of diameter 75mm and high 5～45 mm was measured for 14 energy γ-rays. The efficiency versus thickness of sample are fitted using quadratic equation and the correlation coefficients R2 are better 0.98. The efficiency calibration was done for sample geometry of 5～45 mm high by efficiency values that was derived by interpolating. Several sediment cores were measured and the depth profiles of 40K, 210Pb, 226Ra, 228Ra, 228Th, 238U and 137Cs of one of them were disscussed. |
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| Keywords: | sediment core natural radionuclide 137 Cs efficiency calibration |
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