Chinese Physics C > 2007, Vol. 31 > Issue(10): 978-981

Preparation of¹⁸²Hf AMS Standard Sample and Test on HI-13 Tandem AMS

Department of Nuclear Physics, China Institute of Atomic Energy, Beijing 102413, China2 Nuclear Power Institute of China, Sichuan, Jiajiang 610005, China

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The preparation and accelerator mass spectrometry (AMS) measurements of a series of ¹⁸²Hf AMS calibration standards are described in this paper. The preparation consists of five processes, the synthesis of the initial ¹⁸²Hf/ ¹⁸⁰Hf standard sample by double neutron capture reaction of ¹⁸⁰Hf, the accurate measurement of this standard for isotopic ratio with thermal ionization mass spectrometry (TIMS), the chemical separation of isobaric interference ¹⁸²W, the sequential dilution of the initial standard, and the preparation of HfF ₄. The value of ¹⁸²Hf/ ¹⁸⁰Hf in the initial ¹⁸²Hf/ ¹⁸⁰Hf standard was obtained with TIMS to be (1.63±0.01)×10 ^－6. Chemical separation and purification procedures were developed and applied in the preparation of all ¹⁸²Hf/ ¹⁸⁰Hf standards for the removal of major isobaric interference nuclide ¹⁸²W. As a result, three ¹⁸²Hf AMS standards with ¹⁸²Hf/ ¹⁸⁰Hf ratios of (1.63±0.01)×10 ^－6, (3.22±0.26)×10 ^－8, (3.45±0.32)×10 ^－10were obtained. AMS measurements of these standard samples were performed and good linearity was obtained in a plot of AMS results vs nominal values for ¹⁸²Hf/ ¹⁸⁰Hf ranging from 1.63×10 ^－6to 3.45×10 ^－10.

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YIN Xin-Yi, HE Ming, DONG Ke-Jun, QIU Jiu-Zi, WU Shao-Yong, ZHANG Jin-Song, ZHANG Chun-Hua, ZHENG Yun, GUAN Yong-Jing and JIANG Shan. Preparation of ¹⁸²Hf AMS Standard Sample and Test on HI-13 Tandem AMS[J]. Chinese Physics C, 2007, 31(10): 978-981.

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Received: 2006-11-28
Revised: 2007-03-19

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通讯作者:陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Preparation of¹⁸²Hf AMS Standard Sample and Test on HI-13 Tandem AMS

Corresponding author:YIN Xin-Yi,

Department of Nuclear Physics, China Institute of Atomic Energy, Beijing 102413, China2 Nuclear Power Institute of China, Sichuan, Jiajiang 610005, China

Received Date:2006-11-28

Accepted Date:2007-03-19

Available Online:2007-10-05

Abstract:The preparation and accelerator mass spectrometry (AMS) measurements of a series of¹⁸²Hf AMS calibration standards are described in this paper. The preparation consists of five processes, the synthesis of the initial¹⁸²Hf/¹⁸⁰Hf standard sample by double neutron capture reaction of¹⁸⁰Hf, the accurate measurement of this standard for isotopic ratio with thermal ionization mass spectrometry (TIMS), the chemical separation of isobaric interference¹⁸²W, the sequential dilution of the initial standard, and the preparation of HfF₄. The value of¹⁸²Hf/¹⁸⁰Hf in the initial¹⁸²Hf/¹⁸⁰Hf standard was obtained with TIMS to be (1.63±0.01)×10^－6. Chemical separation and purification procedures were developed and applied in the preparation of all¹⁸²Hf/¹⁸⁰Hf standards for the removal of major isobaric interference nuclide¹⁸²W. As a result, three¹⁸²Hf AMS standards with¹⁸²Hf/¹⁸⁰Hf ratios of (1.63±0.01)×10^－6, (3.22±0.26)×10^－8, (3.45±0.32)×10^－10were obtained. AMS measurements of these standard samples were performed and good linearity was obtained in a plot of AMS results vs nominal values for¹⁸²Hf/¹⁸⁰Hf ranging from 1.63×10^－6to 3.45×10^－10.

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Preparation of¹⁸²Hf AMS Standard Sample and Test on HI-13 Tandem AMS

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