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173Lu和174gLu衰变数据的测量

师全林 白涛 刘杰 商建波 张小林 代义华

师全林, 白涛, 刘杰, 商建波, 张小林, 代义华. 173Lu和174gLu衰变数据的测量[J]. 原子核物理评论, 2016, 33(4): 518-523. doi: 10.11804/NuclPhysRev.33.04.518
引用本文: 师全林, 白涛, 刘杰, 商建波, 张小林, 代义华. 173Lu和174gLu衰变数据的测量[J]. 原子核物理评论, 2016, 33(4): 518-523. doi: 10.11804/NuclPhysRev.33.04.518
SHI Quanlin, BAI Tao, LIU Jie, SHANG Jianbo, ZHANG Xiaolin, DAI Yihua. Measurements of Decay Data of 173Lu and 174gLu[J]. Nuclear Physics Review, 2016, 33(4): 518-523. doi: 10.11804/NuclPhysRev.33.04.518
Citation: SHI Quanlin, BAI Tao, LIU Jie, SHANG Jianbo, ZHANG Xiaolin, DAI Yihua. Measurements of Decay Data of 173Lu and 174gLu[J]. Nuclear Physics Review, 2016, 33(4): 518-523. doi: 10.11804/NuclPhysRev.33.04.518

173Lu和174gLu衰变数据的测量

doi: 10.11804/NuclPhysRev.33.04.518
详细信息
    作者简介:

    师全林(1971-),男,甘肃临洮人,研究员,博士,从事核技术及应用研究;E-mail:Shiquanlin@nint.ac.cn

  • 中图分类号: O571.32

Measurements of Decay Data of 173Lu and 174gLu

  • 摘要: 175Lu(n;2n)174m,gLu(n;2n)173Lu反应在高能中子通量监测中具有重要作用,其产物的放射性活度通常用HPGe探测器测量,这就需要174m,gLu和173Lu的半衰期和γ射线发射率等衰变数据必须准确无误。在主要的评价核数据库中,只有ENDF/B 7.1和JEFF 3.1.1数据库给出了173Lu和174Lu的半衰期和γ射线的发射几率等衰变数据,其中173Lu的射线发射几率ENDF/B 7.1库比JEFF 3.1.1库总体偏高,其他评价数据两个数据库非常一致。在中国原子能研究院的串列加速器上用20 MeV质子辐照金属Yb靶生产了含有173Lu,174m,gLu的放射性溶液,用激光共振电离质谱(LRIMS)和热表面电离质谱(TIMS)两种同位素稀释法测定了该溶液中173Lu和174m,gLu核素浓度,然后制备测量源在HPGe探测器上进行了近7年的跟踪测量,发现173Lu的半衰期为1.45 a,比目前评价的数据1.37 a高6.1%,636.1 keV射线发射几率的偏差最大,比ENDF/B 7.1的评价数据偏高7%。174gLu半衰期的测量结果3.37 a175Lu(n;2n)174m,gLu(n;2n)173Lu反应在高能中子通量监测中具有重要作用,其产物的放射性活度通常用HPGe探测器测量,这就需要174m,gLu和173Lu的半衰期和γ射线发射率等衰变数据必须准确无误。在主要的评价核数据库中,只有ENDF/B 7.1和JEFF 3.1.1数据库给出了173Lu和174Lu的半衰期和射线的发射几率等衰变数据,其中173Lu的射线发射几率ENDF/B 7.1库比JEFF 3.1.1库总体偏高,其他评价数据两个数据库非常一致。在中国原子能研究院的串列加速器上用20 MeV质子辐照金属Yb靶生产了含有173Lu,174m,gLu的放射性溶液,用激光共振电离质谱(LRIMS)和热表面电离质谱(TIMS)两种同位素稀释法测定了该溶液中173Lu和174m,gLu核素浓度,然后制备测量源在HPGe探测器上进行了近7年的跟踪测量,发现173Lu的半衰期为1.45 a,比目前评价的数据1.37 a高6.1%,636.1 keV γ射线发射几率的偏差最大,比ENDF/B 7.1的评价数据偏高7%。174gLu半衰期的测量结果3.37 a,比评价数据3.31 a高约1.8%,174gLu 76.5 keV和1 241.8 keV γ射线的发射几率比ENDF/B 7.1的评价数据分别低1.87%和12.8%。


    175Lu(n,2n)174m,gLu(n,2n)173Lu are important neutron reactions to monitor the high energy neutron fluxes and the residual nuclei, 174m,gLu and 173Lu, are usually measured by a HPGe spectrometer conveniently so that the decay data such as half lives and gamma-ray emission probabilities of 174m,gLu and 173Lu must be accurate. There are evaluated decay data only in ENDF/B 7.1 and JEFF 3.1.1 among the major evaluated nuclear data libraries, where the most data are almost same besides the gamma-ray emission probabilities of 173Lu are higher in ENDF/B 7.1 than that in JEFF 3.1.1. Yb metal as a target was irradiated by 20 MeV proton beams on a tandem accelerator in CIAE to produce 174m,gLu and 173Lu, and 176Lu isotopic dilution methods based upon a laser resonance ionization mass spectrometer (LRIMS) and a thermal surface ionization mass spectrometer (TIMS) were employed to determine the numbers of nuclides of 174Lu and 173Lu in a solution containing the irradiated target. Several radioactive sources made from the solution had been measured by a HPGe detector during the past 7 years and the peak intensities of the characteristic gamma-rays from 174gLu and 173Lu were analyzed to determine the half lives and gamma-ray emission probabilities. According to the measurements, the half life of 173Lu is 1.45 a, which is about 6.1% longer than the evaluated 1.37 a, and the gamma-ray emission probabilities of 173Lu is also different from the evaluated data, especially the emission probability of 636.1 keV gamma-ray of 173Lu is 7% higher than the value in ENDF/B 7.1. The half life of 174gLu is 3.37 a, about 1.8% longer than the evaluated 3.31 a, and the emission probabilities of 76.5 keV and 1 241.8 keV gamma-rays of 174Lu are 1.87% and 12.8% lower than the evaluated data in ENDF/B 7.1, respectively.
  • [1] OECD Nuclear Energy Agency.[DB/OL].[2013-11-01]. http://www.oecd-nea.org/janis.
    [2] LI Zhiming, Deng Hu, Zhu Fengrong, et al. Journal of Chinese Mass Spectrometry Society, 2002, 23:158. (in Chinese) (李志明, 邓虎, 朱凤蓉, 等. 质谱学报, 2002, 23:158)
    [3] LI Zh-ming, Zhu Fengrong, Zhang Zibin, et al. Journal of Chinese Mass Spectrometry Society, 2005, 26(suppl.):45. (in Chinese) (李志明, 朱凤蓉, 张子斌, 等. 质谱学报, 2005, 26(增刊):45.)
    [4] LI Zhiming, REN Xiangjun, Deng Hu, et al. Journal of Chinese Mass Spectrometry Society, 2007, 28(suppl.):90. (in Chinese) (李志明, 任向军, 邓虎, 等. 质谱学报, 2007, 28(增刊):90)
    [5] XU Jiang, ZHU Fengrong, LI Zhiming, et al. Journal of Nuclear and Radiochemistry, 2007, 29(1):27. (in Chinese) (徐江, 朱凤蓉, 李志明, 等. 核化学与放射化学, 2007, 29(1):27.)
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出版历程
  • 收稿日期:  2016-06-02
  • 修回日期:  2016-08-24
  • 刊出日期:  2016-12-20

173Lu和174gLu衰变数据的测量

doi: 10.11804/NuclPhysRev.33.04.518
    作者简介:

    师全林(1971-),男,甘肃临洮人,研究员,博士,从事核技术及应用研究;E-mail:Shiquanlin@nint.ac.cn

  • 中图分类号: O571.32

摘要: 175Lu(n;2n)174m,gLu(n;2n)173Lu反应在高能中子通量监测中具有重要作用,其产物的放射性活度通常用HPGe探测器测量,这就需要174m,gLu和173Lu的半衰期和γ射线发射率等衰变数据必须准确无误。在主要的评价核数据库中,只有ENDF/B 7.1和JEFF 3.1.1数据库给出了173Lu和174Lu的半衰期和γ射线的发射几率等衰变数据,其中173Lu的射线发射几率ENDF/B 7.1库比JEFF 3.1.1库总体偏高,其他评价数据两个数据库非常一致。在中国原子能研究院的串列加速器上用20 MeV质子辐照金属Yb靶生产了含有173Lu,174m,gLu的放射性溶液,用激光共振电离质谱(LRIMS)和热表面电离质谱(TIMS)两种同位素稀释法测定了该溶液中173Lu和174m,gLu核素浓度,然后制备测量源在HPGe探测器上进行了近7年的跟踪测量,发现173Lu的半衰期为1.45 a,比目前评价的数据1.37 a高6.1%,636.1 keV射线发射几率的偏差最大,比ENDF/B 7.1的评价数据偏高7%。174gLu半衰期的测量结果3.37 a175Lu(n;2n)174m,gLu(n;2n)173Lu反应在高能中子通量监测中具有重要作用,其产物的放射性活度通常用HPGe探测器测量,这就需要174m,gLu和173Lu的半衰期和γ射线发射率等衰变数据必须准确无误。在主要的评价核数据库中,只有ENDF/B 7.1和JEFF 3.1.1数据库给出了173Lu和174Lu的半衰期和射线的发射几率等衰变数据,其中173Lu的射线发射几率ENDF/B 7.1库比JEFF 3.1.1库总体偏高,其他评价数据两个数据库非常一致。在中国原子能研究院的串列加速器上用20 MeV质子辐照金属Yb靶生产了含有173Lu,174m,gLu的放射性溶液,用激光共振电离质谱(LRIMS)和热表面电离质谱(TIMS)两种同位素稀释法测定了该溶液中173Lu和174m,gLu核素浓度,然后制备测量源在HPGe探测器上进行了近7年的跟踪测量,发现173Lu的半衰期为1.45 a,比目前评价的数据1.37 a高6.1%,636.1 keV γ射线发射几率的偏差最大,比ENDF/B 7.1的评价数据偏高7%。174gLu半衰期的测量结果3.37 a,比评价数据3.31 a高约1.8%,174gLu 76.5 keV和1 241.8 keV γ射线的发射几率比ENDF/B 7.1的评价数据分别低1.87%和12.8%。


175Lu(n,2n)174m,gLu(n,2n)173Lu are important neutron reactions to monitor the high energy neutron fluxes and the residual nuclei, 174m,gLu and 173Lu, are usually measured by a HPGe spectrometer conveniently so that the decay data such as half lives and gamma-ray emission probabilities of 174m,gLu and 173Lu must be accurate. There are evaluated decay data only in ENDF/B 7.1 and JEFF 3.1.1 among the major evaluated nuclear data libraries, where the most data are almost same besides the gamma-ray emission probabilities of 173Lu are higher in ENDF/B 7.1 than that in JEFF 3.1.1. Yb metal as a target was irradiated by 20 MeV proton beams on a tandem accelerator in CIAE to produce 174m,gLu and 173Lu, and 176Lu isotopic dilution methods based upon a laser resonance ionization mass spectrometer (LRIMS) and a thermal surface ionization mass spectrometer (TIMS) were employed to determine the numbers of nuclides of 174Lu and 173Lu in a solution containing the irradiated target. Several radioactive sources made from the solution had been measured by a HPGe detector during the past 7 years and the peak intensities of the characteristic gamma-rays from 174gLu and 173Lu were analyzed to determine the half lives and gamma-ray emission probabilities. According to the measurements, the half life of 173Lu is 1.45 a, which is about 6.1% longer than the evaluated 1.37 a, and the gamma-ray emission probabilities of 173Lu is also different from the evaluated data, especially the emission probability of 636.1 keV gamma-ray of 173Lu is 7% higher than the value in ENDF/B 7.1. The half life of 174gLu is 3.37 a, about 1.8% longer than the evaluated 3.31 a, and the emission probabilities of 76.5 keV and 1 241.8 keV gamma-rays of 174Lu are 1.87% and 12.8% lower than the evaluated data in ENDF/B 7.1, respectively.

English Abstract

师全林, 白涛, 刘杰, 商建波, 张小林, 代义华. 173Lu和174gLu衰变数据的测量[J]. 原子核物理评论, 2016, 33(4): 518-523. doi: 10.11804/NuclPhysRev.33.04.518
引用本文: 师全林, 白涛, 刘杰, 商建波, 张小林, 代义华. 173Lu和174gLu衰变数据的测量[J]. 原子核物理评论, 2016, 33(4): 518-523. doi: 10.11804/NuclPhysRev.33.04.518
SHI Quanlin, BAI Tao, LIU Jie, SHANG Jianbo, ZHANG Xiaolin, DAI Yihua. Measurements of Decay Data of 173Lu and 174gLu[J]. Nuclear Physics Review, 2016, 33(4): 518-523. doi: 10.11804/NuclPhysRev.33.04.518
Citation: SHI Quanlin, BAI Tao, LIU Jie, SHANG Jianbo, ZHANG Xiaolin, DAI Yihua. Measurements of Decay Data of 173Lu and 174gLu[J]. Nuclear Physics Review, 2016, 33(4): 518-523. doi: 10.11804/NuclPhysRev.33.04.518
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