热电离质谱法测定国际比对氧化铀芯块中的铀同位素比值
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摘要
采用全蒸发-热电离质谱技术测量了国际比对二氧化铀样品中的铀同位素比值。比对结果表明,本实验室提交的~(234)U/~(238)U、~(235)U/~(238)U和~(236)U/~(238)U值与IAEA公布的参考值偏差分别为0.02%、-0. 003%和0. 97%,在实验室间分析测试能力评价中, Z (或ζ)分数分别是0.03(或0.05)、-0.05(或-0.07)和0.15(或0.25),均被评价为满意。
This work deployed Total Evaporation method of Thermal Ionization Mass Spectrometry for measuring the uranium isotopic ratios in an uranium dioxide fuel pellet, which was a part of an internationalnuclear material round robin held by International Atomic Energy Agency(IAEA). The results indicated that the ~(234)U/~(238) U,~(235)U/~(238)U and ~(236)U/~(238)U ratios submitted by our laboratory had deviations of 0.02%,-0.003%,and 0.97% from the published reference values by IAEA respectively.In laboratory analytical capabilityassessment, Z(ζ) scores are 0.03(0.05),-0.05(-0.07) and 0.15(0.25) respectively, showed that all datawere assessed as satisfactory.
This work deployed Total Evaporation method of Thermal Ionization Mass Spectrometry for measuring the uranium isotopic ratios in an uranium dioxide fuel pellet, which was a part of an internationalnuclear material round robin held by International Atomic Energy Agency(IAEA). The results indicated that the ~(234)U/~(238) U,~(235)U/~(238)U and ~(236)U/~(238)U ratios submitted by our laboratory had deviations of 0.02%,-0.003%,and 0.97% from the published reference values by IAEA respectively.In laboratory analytical capabilityassessment, Z(ζ) scores are 0.03(0.05),-0.05(-0.07) and 0.15(0.25) respectively, showed that all datawere assessed as satisfactory.
引文
[1]M Romkowski,S Franzini,L Koch.Mass￣spectrometric analysis of sub-nanocurie samples of uranium and plutonium[A].Proceedings to Eight Annual ESARDA Symposium.London.1987.
[2]魏兴俭,徐新冕,张海路,等,蒸发技术在铀同位素丰度测量上的应用[J].质谱学报,2001,22(1):7-14.
[3]K J Mathew,G O’Connor,A.Hasozbek,et al.Total evaporation method for uranium isotope-amount ratio measurements[J].J.Anal.At.Spectrom.,2013,28(6):866-876.
[4]S Richter,S A Goldberg.Improved techniques for high accuracy isotope ratio measurements of nuclear materials using thermal ionization mass spectrometry[J].Int.J.of Mass Spectrometry,2003,229(3):181-197.
[5]S Richter,H Kühn,Y Aregbe,et al.Improvements in routine uranium isotope ratio measurements using the modified total evaporation method for multi￣collector thermal ionization mass spectrum[J].J.of Analytical Atomic Spectroscopy,2011,26(3):550-564.
[6]IAEA.The IAEA 2017 Nuclear Material Round Robin Report:SG￣RP￣14523[R].Austria:International Atomic Energy Agency,2017.
[2]魏兴俭,徐新冕,张海路,等,蒸发技术在铀同位素丰度测量上的应用[J].质谱学报,2001,22(1):7-14.
[3]K J Mathew,G O’Connor,A.Hasozbek,et al.Total evaporation method for uranium isotope-amount ratio measurements[J].J.Anal.At.Spectrom.,2013,28(6):866-876.
[4]S Richter,S A Goldberg.Improved techniques for high accuracy isotope ratio measurements of nuclear materials using thermal ionization mass spectrometry[J].Int.J.of Mass Spectrometry,2003,229(3):181-197.
[5]S Richter,H Kühn,Y Aregbe,et al.Improvements in routine uranium isotope ratio measurements using the modified total evaporation method for multi￣collector thermal ionization mass spectrum[J].J.of Analytical Atomic Spectroscopy,2011,26(3):550-564.
[6]IAEA.The IAEA 2017 Nuclear Material Round Robin Report:SG￣RP￣14523[R].Austria:International Atomic Energy Agency,2017.