| 加速器质谱测量岩石样品中41Ca的初步研 |
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| 引用本文： | 窦亮,何明,董克君,武绍勇,李振宇,谢林波,林德雨,王晓波,沈洪涛,姜山.加速器质谱测量岩石样品中41Ca的初步研[J].原子能科学技术,2013,47(12):2322-2326. |
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| 作者姓名： | 窦亮 何明 董克君 武绍勇 李振宇 谢林波 林德雨 王晓波 沈洪涛 姜山 |
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| 作者单位： | 1.中国原子能科学研究院 核物理研究所，北京102413；2.厦门大学 海洋与地球学院，福建 厦门361005；3.广西大学 物理科学与技术学院，广西 南宁530004；4.广西师范大学 物理科学与技术学院，广西 桂林541004 |
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| 摘 要： | 41Ca在核天体物理及地质年代学方面可能具有较高的应用价值。为测量天然岩石样品中41Ca的本底水平，探讨了41Ca-AMS测量中岩石样品的CaF2制备，提出了二次氟化的制备方法。在此基础上，通过对导电介质与靶锥的改进，设计了一种提高CaF-3束流引出强度的方案。该方案可有效提高CaF-3束流引出强度。实验结果表明，天然岩石样品中41Ca/40Ca（41Ca、40Ca原子个数比）的本底水平低于8×10-14。
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| 关 键 词： | 岩石 CaF2" target="_blank">2')">CaF2 束流强度 41Ca-AMS测量" target="_blank">41Ca-AMS测量')">41Ca-AMS测量 |
Preliminary Study of 41Ca-AMS Measurement in Rock Samples |
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| DOU Liang,HE Ming,DONG Ke-jun,WU Shao-yong,LI Zhen-yu,XIE Lin-bo,LIN De-yu,WANG Xiao-bo,SHEN Hong-tao,JIANG Shan.Preliminary Study of 41Ca-AMS Measurement in Rock Samples[J].Atomic Energy Science and Technology,2013,47(12):2322-2326. |
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| Authors: | DOU Liang HE Ming DONG Ke-jun WU Shao-yong LI Zhen-yu XIE Lin-bo LIN De-yu WANG Xiao-bo SHEN Hong-tao JIANG Shan |
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| Affiliation: | 1.China Institute of Atomic Energy, P. O. Box 275-50, Beijing 102413, China;2.College of Ocean and Earth Sciences, Xiamen University, Xiamen 361005, China; 3.College of Physics Science and Technology, Guangxi University, Nanning 530004, China;4.College of Physics Science and Technology, Guangxi Normal University, Guilin 541004, China |
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| Abstract: | Perhaps the value of 41Ca applications in nuclear astrophysics and geochronology is high. The CaF2 preparation of rock samples was investigated to measure the background level of 41Ca in the natural rock samples by AMS. A preparation method of secondary fluorination was proposed by some physical and chemical processes. On this basis, a program to improve CaF-3 beam intensity was designed by improving conductive medium and target cone. This sample preparation program can effectively improve the beam intensity of CaF-3. The experimental results show that with these settings the 41Ca/40Ca background level of rock samples is less than 8×10-14. |
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| Keywords: | rock CaF2 beam intensity 41Ca-AMS measurement |
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