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首页> 外文期刊>Talanta: The International Journal of Pure and Applied Analytical Chemistry >Bk and Cf chromatographic separation and ~(249)Bk/~(248)Cm and ~(249)Cf/~(248)Cm elemental ratios determination by inductively coupled plasma quadrupole mass spectrometry
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Bk and Cf chromatographic separation and ~(249)Bk/~(248)Cm and ~(249)Cf/~(248)Cm elemental ratios determination by inductively coupled plasma quadrupole mass spectrometry

机译：Bk和Cf色谱分离以及〜（249）Bk /〜（248）Cm和〜（249）Cf /〜（248）Cm元素比的电感耦合等离子体四极杆质谱法测定

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摘要

The French Atomic Energy Commission has carried out several experiments for the study of minor-actinide transmutation processes in high intensity thermal neutron flux. In this context a Cm sample enriched in ~(248)Cm (～97%) was irradiated in a thermal neutron flux at the High Flux Reactor (HFR) of the Laue-Langevin Institute (ILL). The precise and accurate determination of Cf isotope ratios and of ~(249)Bk/~(248)Cm and ~(249)Cf/~(248)Cm elemental ratios in the ~(248)Cm irradiated sample is crucial for the calculation of actinide neutron capture cross-sections. This work describes an analytical procedure for the separation and the isotope ratio measurement of Bk and Cf in the irradiated sample. The Bk and Cf separation is based on a lanthanides separation protocol previously developed by the laboratory. Well-defined retention times for Bk and Cf were obtained by coupling the Ionic Chromatography (IC) with an ICP-QMS. All conditions of element separation by IC and the different steps of the analytical protocol in order to obtain the isotopic and elemental ratios are presented. Relative uncertainties of Cf isotopic ratios range from 0.3% to 0.5% and the uncertainty of the ~(249)Bk/~(248)Cm and ~(249)Cf/ ~(248)Cm elemental ratios are respectively 6.1% and 3.2%. This level of uncertainty for both isotopic and elemental ratios is in perfect agreement with the requirement for transmutation studies.
机译：法国原子能委员会已经进行了一些实验，以研究高强度热中子通量中次-系元素的processes变过程。在这种情况下，在Laue-Langevin研究所（ILL）的高通量反应堆（HFR）中以热中子通量辐照了富含〜（248）Cm（〜97％）的Cm样品。精确确定Cf同位素比以及〜（248）Cm辐照样品中〜（249）Bk /〜（248）Cm和〜（249）Cf /〜（248）Cm元素比的方法对于计算至关重要act系元素中子俘获截面图。这项工作描述了一种用于辐射样品中Bk和Cf的分离和同位素比测量的分析程序。 Bk和Cf分离是基于实验室先前开发的镧系元素分离方案。通过将离子色谱（IC）与ICP-QMS偶联，可以得到Bk和Cf的保留时间。介绍了通过IC进行元素分离的所有条件以及分析规程的不同步骤，以获得同位素和元素比。 Cf同位素比率的相对不确定度范围为0.3％至0.5％，〜（249）Bk /〜（248）Cm和〜（249）Cf /〜（248）Cm元素比率的不确定度分别为6.1％和3.2％ 。同位素和元素比率的不确定性水平与trans变研究的要求完全吻合。

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