Research on Measurement of 182Hf with HI-13 AMS System

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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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Research on Measurement of 182Hf 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

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±10-11 at present.

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