无载体放射性同位素~(101m)Rh的制备

THE PREPARATION OF CARRIER-FREE RADIOISOTOPE ~(101)mRh

摘要: <正> 铂族元素的化学分离用放射性示踪法进行鉴别具有十分明显的优点,它速度快、方法简便、灵敏度高。由反应堆制取的~(191)Os、~(192)Ir、~(106)Ru作为示踪剂已广泛用于放化分离和铂族元素的行为研究。铑对于热中子有很大反应截面,但反应产生的放射性同位素~(104)Rh(T_(1/2)43秒)、~(104m)Rh(T_(1/2)4.4分)寿命太短。~(105)Rh(T_(1/2)36.5时)虽曾用作示踪剂进行放化分离研

Abstract: Carrier-free radioisotope 101mRh was obtained by bombardment of ruthenium with 7.8 MeV proton from a cyclotron using nuclear reaction 101Ru (p, n) 101mRh. The thick target yield of reaction was 3.4 μCi/μA·h. Distillation and coprecipitation methods were used for the separation of carrier-free Rh radionuclides from proton-irradiated ruthenium with a chemical yield of 101mRh better than 97%.