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本文介绍了在国产1.2m回旋加速器上通过~(109)Ag(d,2n)~(109)Cd核反应,从12.3MeV氘核辐照过的天然银靶中分离与制备无载体~(109)Cd的程序。银靶用HNO_3溶解后,利用金属铜经过电化学置换把银除去,再在混合的HNO_3/HBr介质中通过阴离子交换将~(109)Cd与Cu,~(65)Zn等其它元素定量分离。在制得的~(109)Cd产品中无其它放射性杂质存在(~(109)Cd>99.9%),~(109)Cd的回收率为99%。用陶瓷片吸附或电镀法制得了~(109)Cd的低能Υ和X射线源。
This paper describes the separation and preparation of carrier-free (109) from a natural silver target irradiated with 12.3MeV deuterons via ~ (109) Ag (d, 2n) ~ (109) Cd reaction at a domestic 1.2m cyclotron. Cd procedures. After the silver target was dissolved with HNO3, the silver was removed by electrochemical replacement of metal copper, and the other elements (~ (109) Cd, Cu, ~ (65) Zn and other elements were quantitatively separated by anion exchange in the mixed HNO3 / HBr medium. No other radioactive impurities were present in the prepared (109) Cd product (~ (109) Cd> 99.9%), and the recovery of ~ (109) Cd was 99%. The low-energy γ and X-ray sources of ~ (109) Cd were prepared by ceramic adsorption or electroplating.