Experimental determination of photo fission cross-section of ²³²Th, ²³⁸U and ²³⁷Np using electron accelerator

Fission fragment angular distribution of even-even and odd-mass targets induced by the Bremsstrahlung radiation near fission barrier is one of the promising areas to obtain information on the effect of target ground state spin on transition state distributions. From the excitation energy dependence of the angular distributions, it is possible to characterize the saddle states in terms of energy and quantum numbers J and K of the nuclei. In view of this, systematic studies have been carried out on the measurements of fission fragment angular distribution of Bremsstrahlung radiation induced fission of ²³²Th, ²³⁸U and ²³⁷Np in the energy range of 7.4 MeV to 9.2 MeV obtained from Microtron at Mangalore University. From the present study, the information about the effect of ground state spin of target nuclei and energy dependent cross-section near threshold has been obtained. In the present work, photo fission cross-section of ²³²Th, ²³⁸U and ²³⁷Np evaluated with the help of fission fragment angular distribution measurements by using Bremsstrahlung radiation from 7.4 MeV to 9.0 MeV have been carried out by employing high efficiency SSNTD technique