The use of SSNTD for the investigation of cluster radioactivity and spontaneous fission

Abstract The results of the investigation of some properties of polyethyleneterephtalate, phosphate glass and mica for the study of cluster decay and spontaneous fission of heavy nuclei are given. The investigation results of 230 U cluster decay and 226 Ra spontaneous fission investigation are presented. The probability of 230 U cluster decay in relation to α-decay is less than 7.5·10 14 . The partial half-life of 226 Ra spontaneous fission is more than 6.6·10 17 yrs. The fusion-fission cross sections for the ( 208 Pb + 16 O → 224 Th ) reaction, as the inverse reaction of cluster decay, in the subbarrier region of ion energy was measured. For the energies of 78, 75, 73 and 68 MeV 16 O (lab.system) the cross-sections are 7.8; 3.7·10 −2 , 8.5·10 −4 and 6·10 −6 mb, respectively.