To study the correlation between fragment mass distributions and shell structures of fission fragments, fragment mass and energy distributions in proton-induced fission of Th-232 and uranium isotopes, U-233,U-235,U-238, were precisely measured using a double-TOF method. It was found that the lighter side of the heavier wing of asymmetric mass distributions shifts to larger fragment mass number corresponding to the N/Z value of the fissioning nucleus. The results are explained qualitatively by the change of the most probable mass number of fission fragments of Z = 50 proton-shell.
Goto, S,Kaji, D,Nishinaka, I,et al. Characteristics of the asymmetric mass distribution in proton-induced fission of actinides[J]. JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY,2003,255(1):#REF!.
Goto, S.,Kaji, D.,Nishinaka, I.,Nagame, Y.,Ichikawa, S.,...&赵宇亮.(2003).Characteristics of the asymmetric mass distribution in proton-induced fission of actinides.JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY,255(1),#REF!.
Goto, S,et al."Characteristics of the asymmetric mass distribution in proton-induced fission of actinides".JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY 255.1(2003):#REF!.