用~(95)Zr放射性同位素稀释法测定~(97)Zr(~(97)Zb)

QUANTITATIVE DETERMINATION OF ~(97)Zr(~(97)Nb) BY THE RADIOISOTOPIC DILUTION METHOD WITH ~(95)Zr AS DILUENT

摘要: <正> 目前,放化法测定裂变产额的准确度一般只能达到±3％。为了进一步提高产额测定的准确度和灵敏度,作者之一提出采用放射性同位素稀释法,并认为以~(95)Zr放射性同位素稀释法测定样品中~97Zr(~(97)Nb)的含量(计数率),其测量准确度可能达到±1％以内,本工作对相对测量部分验证了这一看法。并用放射性同位素稀释法证明:用TTA(噻吩甲酰三氟丙酮)萃取法由裂变产物中分离出来的无载体~(97)Zr(~(95)Zr)达到放射化学纯。但目前尚未进行裂变产额的测定。

Abstract: It was verified by present work that the relative accuracy of the determination of 97Zr (97Nb) by-the radioisotopic dilution method with 95Zr as a diluent reaches within±1%, and that by the same method the carrier-free 97Zr(95Zr) prepared from the fission products by TTA extraction is radiochemically pure.