Cassette P, Chartier F, Isnard H, Fréchou C, Laszak I, Degros J P, Bé M M, Lépy M C, Tartes I
CEA, LIST, Laboratoire National Henri Becquerel (LNE-LNHB), F-91191 Gif sur Yvette, France.
Appl Radiat Isot. 2010 Jan;68(1):122-30. doi: 10.1016/j.apradiso.2009.08.011. Epub 2009 Aug 25.
This study describes a new determination of the decay scheme and half-life of (93)Zr. A pure (93)Zr solution was obtained after chemical separation from the dissolution of an irradiated zircaloy sample. The concentration of (93)Zr in the solution was measured by mass spectrometry, with an isotopic dilution technique. The activity of the solution was measured by liquid scintillation counting, using an efficiency tracing method. The measurement of the activity concentration of (93)Nb(m) by X-ray spectrometry, allowed the determination of the (93)Zr decay scheme and the calculation of the (93)Zr detection efficiency. This leads to the calculation of the decay probability of (93)Zr toward (93)Nb(m) of (0.73+/-0.06) and to a half-life of (93)Zr of (1.64+/-0.06)x10(6) years. These values are discussed in comparison with the evaluated values available in the literature.
本研究描述了对(93)Zr衰变图和半衰期的一种新测定方法。从辐照锆合金样品溶解物中进行化学分离后，获得了纯(93)Zr溶液。采用同位素稀释技术，通过质谱法测定溶液中(93)Zr的浓度。使用效率追踪法，通过液体闪烁计数测量溶液的活度。通过X射线光谱法测量(93)Nb(m)的活度浓度，从而确定(93)Zr的衰变图并计算(93)Zr的探测效率。由此计算出(93)Zr向(93)Nb(m)衰变的概率为(0.73±0.06)，(93)Zr的半衰期为(1.64±0.06)×10(6)年。将这些值与文献中可用的评估值进行了比较讨论。
