磁流体动力学电沉积法制备^(241)Am α放射源  

Preparation of Alpha Source for ^(241)Am by Magnetohydrodynamic Electrodeposition Method

作　　者：张鹏[1] 林敏[1] 徐利军[1] 陈细林[1] 夏文[1] 张卫东[1] 贾雪文[1] 陈义珍[1] 崔莹[1] 罗瑞[1] ZHANG Peng;LIN Min;XU Lijun;CHEN Xilin;XIA Wen;ZHANG Weidong;JIA Xuewen;CHEN Yizhen;CUI Ying;LUO Rui(National Key Laboratory for Metrology and Calibration Techniques,China Institute of Atomic Energy,Beijing 102413,China)

机构地区：[1]中国原子能科学研究院计量与校准技术国防科技重点实验室,北京102413

出　　处：《原子能科学技术》2018年第1期8-13,共6页Atomic Energy Science and Technology

摘　　要：针对目前核电站安全运行实时监测中对高分辨率241 Am作为稳峰源的需求,建立了一种高分辨率α放射源制备方法——磁流体动力学电沉积法,并设计了磁流体动力学电沉积法制备放射源的装置和流程。以241 Am为研究对象,对磁流体动力学电沉积法制备放射源的工艺条件进行了优化选择:在沉积槽单侧施加磁场使沉积源片中心处的磁感应强度B=0.193T、(NH_4)_2SO_4电解液浓度0.5mol/L、电流密度180mA/cm^2、沉积液pH=2.0~2.5、电极间距5mm、沉积时间1h。结果显示,241 Am可定量沉积在不锈钢阴极源片上,沉积效率近100%,且所制源的能量分辨率较不加磁场时提高了15.0%。所制源的牢固性和均匀性检验结果表明,磁流体动力学电沉积法所制备的241 Amα放射源的牢固性和均匀性均良好。In order to offer the high resolution 241 Am alpha source used in the real-time monitoring of nuclear power plant safety operation,the magnetohydrodynamic electrodeposition method was built,and the equipment and processes were designed.The 241 Am sources were prepared by this method,and the deposition conditions were optimized.The optimal deposition conditions are as follows:(NH 4)2SO 4 concentration is 0.5 mol/L as deposition solution,the current density is 180 mA/cm 2,the distance between platinum anode and stainless steel cathode is 5 mm,the magnetic induction at the center of the source slice is 0.193 T,pH of deposition solution is 2.0-2.5,and the deposition time is 1 h.The results show that 241 Am can be deposited quantitatively on the cathode,the deposition yield is nearly to 100%,and the energy resolution is 15.0%higher than that without the magnetic field.The uniformity and firnmess of 241 Am sources were inspected,and the results show that the uniformity and firnmess of the sources prepared by the magnetohydrodynamic electrodeposition method are both good.

关 键 词：磁流体动力学电沉积法 α放射源 高分辨率 241Am 沉积装置 

分 类 号：O646.54[理学—物理化学] O614.35[理学—化学]