Abstract: TRANSTARGET RESIDUE YIELD MEASUREMENT IN INTERACTION OF 12C IONS WITH CESIUM TARGETSLi Zongwei Yang Weifan Zhao ZhizhengYang Yongfeng Qin zhi(Institute of Modern Physics,the Chinese Academy of Sciences,Lanzhou 730000)ABSTRACTThe yields of transtarget products produced in the reaction of 47 MeV/A 12C ions with cesium compound targets are measured by using nuclear chemical method and the offline γ spectrum techniques.The results show that the transtarget products have bigger reaction cross sections.The peak position of barium isotope distribution is Ap=1297±02 and the distribution width parameter is 276±028.Key words Transtarget products Fusion reaction Chemical separation yields Yield Heavy ion nuclear reaction