中文摘要：

采用分子镀方法研究了异丙醇-硝酸体系中两极间距离、电流密度、加入HNO3的量和分子镀持续时间对镀层性能和电沉积效率的影响,确定了制备Tb,Dy和Ho靶的最佳工艺条件。同时也探索了在异丁醇-硝酸体系中,分子镀持续时间和电流密度对Tb靶电沉积效率的影响。因Tb,Dy和Ho三种元素化学性质相近,故采用了相同的工艺条件：两极间最优距离为15 mm,电流密度为5.7 m A/cm2,加入0.1mol/L HNO3 400μL,分子镀时间为1 h。用分光光度法测得各靶的沉积效率均高于85%;利用扫描电子显微镜（SEM）对部分靶的表面形貌分析后发现靶面结构均匀致密;利用能谱仪（EDS）对靶子进行了定性和半定量分析;利用红外光谱法对靶膜化学成分进行了分析,发现靶膜成分结构复杂,不是由一种化合物组成。目前制得的Tb靶和Ho靶已用于中国科学院近代物理研究所加速器SFC低能核化学终端上,利用19F束流轰击,分别产生了W和Os的短寿命同位素,从而成功完成了Sg（Z=106）和Hs（Z=108）的模型试验。

英文摘要：

Preparation of Tb, Dy and Ho targets from the mixture of isopropanol and nitricacid solution are studied by using molecular plating technique. To determine the optimum conditions for the deposition process,the effect of distance between the two electrodes, current density, volume of 0.1 mol/L nitric acid, deposition time on the quality and electrodeposition yield of the target films are investigated individually. Preparation of Tb targets from the mixture of isobutylalcohol and nitricacid solution are also studied by using molecular plating technique. Depending on the similar chemical properties of Tb, Dy and Ho, the same process conditions are used.The suitable distance between the two electrodes is 15 mm. The current density is 5.7 m A/ cm2. The volume of nitric acid（0.1 mol/L） is 400 μL. With the spectrophotometry method, the electrodeposition yields for all the targets prepared are found to be higher than 85% after one hour＇s deposition. The morphological structure of some targets are characterized by scanning electron microscope（SEM） and it can be seen that the surface of the targets are uniform and intact. With EDS method, the composition of some targets are found to be very pure. The chemical structure of the targets are analyzed by Infrared Spectroscopy. It is found that the chemical structure of the targets are complex and the target membrane is not composed by only one compound. Short lived isotopes of W and Os were produced from natural Tb and Ho targets bombarded by19 F beam at the SFC low energy radiochemical terminal of Institute of Modern Physics, Chinese Academy of Sciences, respectively,and were successfully applied in the model experiment of Sg（Z = 106） and Hs（Z = 108）.