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

Preparation of 182Hf 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

  • 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 HfF4. 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)×10－10 were 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 1.63×10－6 to 3.45×10－10.
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    [1] . Vockenhuber C, Oberli F, Bichler M et al. Phys. Rev. Lett.,2004, 93: 172501-1-42. Vockenhuber C, Bichler M, Golser R et al. Nucl. Instrum.Methods Phys. Res., Sect., 2004, B223-224: 823-8283. Norman E B, Schramm D N. Nature, 1983, 304: 515-5174. Lee D-C, Halliday A N. Nature, 1995, 378: 771-7785. WING J, Swartz B A, Huizenga J R. Phys. Rev., 1961,123: 1354-13556. YANG X J, Pin C. Analytica Chimica Acta, 2002, 458(2):375-3867. QIU Jiu-Zi, YIN Xin-Yi, HE Ming et al. HEP NP, 2005,29(7): 648-650(in Chinese) (仇九子，寅新艺，何明等.高能物理与核物理，2005, 29(7):648-650)8. JIANG Song-Sheng. Physics, 1985, 14(8): 481(in Chinese)(蒋菘生.物理，1985, 14(8): 481)9. ZHANG Chun-Hua, DENG Hui, ZHANG Ge et al. J. Chin.Mass Spectr. Soc., 2004, 25(z1): 169-170(in Chinese)(张春华，邓辉，张舸等.质谱学报，2004, 25(z1): 169-170)10. YIN Xin-Yi, JIANG Shan, HE Ming et al. Nucl. Technol.,2006, 29(1): 15-18(in Chinese)(寅新艺，姜山，何明等.核技术，2006, 29(1): 15-18)11. Bowman J D, He ner R H. Nucl. Instrum. Methods, 1978,148: 50312. HE Ming. The Time of Flight for the Mass Identi cationof Heavy Nuclides in AMS, Master thesis, China Institute of Atomic Energy, 1995.(in Chinese) (何明.加速器质谱学中鉴别重离子质量的飞行时间法建立.硕士研究生论文，中国原广能科学研究院，1995)13. HE Ming, JIANG Shan, JIANG Song-Sheng et al. Atom.Energy Sci. and Tech., 1997, 31(4): 301(in Chinese)(何明，姜山，蒋菘生等.原子能科学技术，1997, 31(4): 301)14. QIU Jiu-Zi, JIANG Shan, HE Ming et al. Nucl. Instrum.Methods, 2007, B259(1): 246-24915. QIU Jiu-Zi. Research on Detection Method of 182Hf with Accelerator Mass Spectrometry, Doctor thesis, China Institute of Atomic Energy, 2006(in Chinese)(仇九子.用加速器质谱测量182Hf的方法研究.博士研究生论文，中国原子能科学研究院，2006)

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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.
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. shu
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Received: 2006-11-28
Revised: 2007-03-19
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Preparation of 182Hf 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 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 HfF4. 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)×10－10 were 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 1.63×10－6 to 3.45×10－10.

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