Chinese Physics C > 2007, Vol. 31 > Issue(8): 719-723

Research on Measurement of¹⁸²Hf with HI-13 AMS System

Chinese People's Armed Police Force Academy, Langfang 065000, China2 Department of Nuclear Physics, China Institute of Atomic Energy, Beijing 102413, China3 Department of Physics, Guangxi University, Nanning 530000, China

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Abstract：
¹⁸²Hf with half-life of about (8.90±0.09) Ma is an extinct radionuclide and can only be produced by a supernova explosion in nature. Therefore ¹⁸²Hf is an ideal candidate nuclide for the study on possible supernova explosions in the vicinity of the earth within the last 100 million years. In addition, ¹⁸²Hf is a long-lived radionuclide of particular interest for nuclear engineering. Accurate measurement of ultra-trace ¹⁸²Hf is very important for reactor design，studies on nuclear cosmo-physics and other fields. With an accelerator mass spectrometry (AMS), it is possible to detect the trace amounts of ¹⁸²Hf. In this paper, the detection method of ¹⁸²Hf with HI-13 AMS system at China Institute of Atomic Energy (CIAE) and the chemical procedures to reduce ¹⁸²W interference are presented. The energy and TOF two-dimension spectra of ¹⁸²Hf and ¹⁸³W for blank and a series of standard samples have been obtained, respectively. The ¹⁸²W contribution to the counts in ¹⁸²Hf peak was corrected by ¹⁸³W normalization. The detection sensitivity of this AMS facility for ¹⁸²Hf/ ¹⁸⁰Hf ratio measurement is about 4.15±10 ^－11at present.

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QIU Jiu-Zi, JIANG Shan, HE Ming, YIN Xin-Yi, DONG Ke-Jun, GUAN Yong-Jing and WU Shao-Yong. Research on Measurement of ¹⁸²Hf with HI-13 AMS System[J]. Chinese Physics C, 2007, 31(8): 719-723.

QIU Jiu-Zi, JIANG Shan, HE Ming, YIN Xin-Yi, DONG Ke-Jun, GUAN Yong-Jing and WU Shao-Yong. Research on Measurement of ¹⁸²Hf with HI-13 AMS System[J]. Chinese Physics C, 2007, 31(8): 719-723. shu

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Received: 2006-10-08
Revised: 2006-11-15

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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

Research on Measurement of¹⁸²Hf with HI-13 AMS System

Corresponding author:QIU Jiu-Zi,

Chinese People's Armed Police Force Academy, Langfang 065000, China2 Department of Nuclear Physics, China Institute of Atomic Energy, Beijing 102413, China3 Department of Physics, Guangxi University, Nanning 530000, China

Received Date:2006-10-08

Accepted Date:2006-11-15

Available Online:2007-08-05

Abstract:¹⁸²Hf with half-life of about (8.90±0.09) Ma is an extinct radionuclide and can only be produced by a supernova explosion in nature. Therefore¹⁸²Hf is an ideal candidate nuclide for the study on possible supernova explosions in the vicinity of the earth within the last 100 million years. In addition,¹⁸²Hf is a long-lived radionuclide of particular interest for nuclear engineering. Accurate measurement of ultra-trace¹⁸²Hf is very important for reactor design，studies on nuclear cosmo-physics and other fields. With an accelerator mass spectrometry (AMS), it is possible to detect the trace amounts of¹⁸²Hf. In this paper, the detection method of¹⁸²Hf with HI-13 AMS system at China Institute of Atomic Energy (CIAE) and the chemical procedures to reduce¹⁸²W interference are presented. The energy and TOF two-dimension spectra of¹⁸²Hf and¹⁸³W for blank and a series of standard samples have been obtained, respectively. The¹⁸²W contribution to the counts in¹⁸²Hf peak was corrected by¹⁸³W normalization. The detection sensitivity of this AMS facility for¹⁸²Hf/¹⁸⁰Hf ratio measurement is about 4.15±10^－11at present.

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Research on Measurement of¹⁸²Hf with HI-13 AMS System

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