Preparation process of the isotope 208Pb target with the required size

thickness and configuration was in- troduced. The target had a sandwich structure of C/208Pb/C. The thickness and uniformity of 208Pb target were con- trolled and measured. Through rotating the substrate

the utilization efficiency of 208Pb was considerably increased. The prepared target has a structure of 30 μg/cm2 C + 361μg/cm2 208Pb + 15 μg/cm2 C

and the average thickness of the target that was prepared in the same procedure is 361 μg/cm2. The test results show that the inhomogeneity of the tar- get is less than 9.8%. This can meet the requirements of the experiment in the super-heavy element study.