Abstract
Abstract Fission Fragment Spectroscopy (FFS) measurement technique has been utilized to measure the relative isotopic yield distributions of the even-even correlated fission fragment nuclei produced from 236U* at two different values of excitation energies (E ex ). The fissioning compound nucleus, 236U* was populated at E ex = 6.5 and 21.5 MeV through two different sets of experiments by using the reactions, 235U(n th ,f) and 232Th(α,f), respectively. The experimentally measured relative isotopic yield distributions were further used to obtain the corresponding mass yield distributions. The extracted mass yield distributions of 236U* indicates the transition from asymmetric distribution to bimodal distribution with increase in the values of E ex from 6.5 to 21.5 MeV. The experimental mass yield distribution pattern for the reaction, 232Th(α,f) at E ex = 21.5 MeV could be fitted well through three Gaussian fits as per the prescription based on the Multimodal Random-Neck Rupture Model (MM-RNRM).
Published Version
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