^(109)Cd核素及其低能γ和X射线源的研制

PRODUCTION OF ^(109)Cd AND ITS LOW-ENERGY γ AND X-RAY SOURCES

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。

A procedure is presented for the production and separation of carrier-free ^(109)Cd from irradiated natural silver target with 12.3 MeV deuterons via the ^(109)Ag(d, 2n) ^(109)Cd reaction at a domestic 1.2m cyclotron. After the target was dissolved with HNO_3, silver was removed by electrochemical displacement with copper metal, and ^(109)Cd was quantitatively separated from Cu, Zn and other elements by anion exchange in a mixed HNO_3/HBr medium. Almost no radioimpurities are present in ^(109)Cd obtained (^(109)Cd>99.9%) . The recovery is 99%. The low-energy γ and X-ray source of ^(109)Cd is prepared by adsorbing ^(109)Cd on a ceramic disk or electroplating method.