Energy Dependence of exotic nuclei production cross sections by photofission reaction in GDR range

TL;DR

This study investigates how the production cross sections of exotic nuclei via photofission of uranium vary across the giant dipole resonance energy range, providing theoretical insights into fragment distributions and yields.

Contribution

It offers a theoretical analysis of uranium photofission fragment distributions and yields across a range of bremsstrahlung energies, focusing on the GDR region.

Findings

Peak photofission yield at 29.1 MeV photon energy.

Charge distribution of fission fragments analyzed.

Energy dependence of exotic nuclei production explored.

Abstract

Photofission of actinides is studied in the region of nuclear excitation energies that covers the entire giant dipole resonance (GDR) region. The mass distributions of $^{238}$U photofission fragments have been explored theoretically for eight different endpoint bremsstrahlung energies from 11.5 MeV to 67.7 MeV which correspond to average photon energy of 9.09 MeV to 15.90 MeV. Among these energies, the 29.1 MeV corresponds to the average photon energy of 13.7$\pm$0.3 MeV which coincides with GDR peak for $^{238}$U photofission. The integrated yield of $^{238}$U photofission as well as charge distribution of photofission products are calculated and its role in producing nuclei and their neutron-richness is investigated.