Abstract
Fission product mass distributions were measured in ${}^{20}$Ne + ${}^{232}$Th reaction at ${E}_{\mathrm{lab}}$ = 142.5 and 114 MeV using recoil catcher technique followed by off-line \ensuremath{\gamma}-ray spectrometry. Fission products formed predominantly in complete fusion fission (CFF) or transfer-induced fusion fission (TF) were distinguished based on their $A/Z$. Two groups of fission products that centered around $A/Z$ for CFF and TF were observed. Mass distributions for CFF and TF were obtained after applying corrections for charge distribution using parameters appropriate for CFF and TF. A symmetric mass distribution was observed for CFF. For TF, mass distribution was observed to be asymmetric, indicating a significant role of shell effect owing to the lower excitation energy of the fissioning system. Variance of mass distribution at ${E}_{\mathrm{lab}}$ = 142.5 MeV was calculated using the random neck rupture model (RNRM). The scission-point elongation parameter obtained by RNRM calculations was higher compared to that obtained from the liquid drop model.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call