从裂变产物中提取^(135)Cs的研究  

Separation of Carrier-free ^(135)Cs From Fission Products

作　　者：钱丽娟[1,2] 张生栋[1] 郭景儒[1] 崔安智[1] 杨磊[1] 吴王锁[3] 

机构地区：[1]中国原子能科学研究院放射化学研究所 [2]兰州大学化学化工学院,甘肃兰州730000 [3]兰州大学化学化工学院

出　　处：《核化学与放射化学》2005年第1期11-14,共4页Journal of Nuclear and Radiochemistry

摘　　要：为了制备适用于热中子截面测量用的135Cs,建立了用无机离子交换剂磷酸锆和阴离子交换树脂从裂变产物中分离无载体放化纯135Cs的方法。研究了在用磷酸锆色层柱分离Cs时,温度对收率的影响。实验结果表明:用磷酸锆色层柱从裂变产物中分离Cs时,Cs的化学回收率为 90 0%,对锆、铌、铈、钌等的去污因子为102;结合阴离子交换树脂分离,U的去污因子达104。分离出的135Cs为放化纯,可供135 Cs热中子反应截面测量用。The separation of carrier-free cesium from fission products has been investigated using ion-exchange chromatography with zirconium phosphate inorganic exchanger and anion exchanger resin. The influence of temperature on the recovery of cesium and the eluting conditions of the main fission products using zirconium phosphate exchanger are examined in details. The decontamination of uranium and other fission products for the cesium sample through anion exchanger resin column are also measured. This results show that the chemical recovery of cesium from fission products is more than 90% and the decontamination factors of Zr, Nb, Ce, Ru are higher than 6.2×102. When anion exchanger resin is employed, a decontamination factor of uranium can reach over 104 for the separation of cesium. The separated cesium sample is radiochemical pure, and can be used as a sample in the measurement of the thermal neutron cross section of 135Cs.

关 键 词：^135Cs 磷酸锆 阴离子交换树脂 裂变产物 

分 类 号：O614.115[理学—无机化学]