Consideration of memory of spin and parity in the fissioning compound nucleus by applying the Hauser-Feshbach fission fragment decay model to photonuclear reactions

Abstract

Prompt and $\beta$-delayed fission observables, such as the average number of prompt and delayed neutrons, the independent and cumulative fission product yields, and the prompt $\gamma$-ray energy spectra for the photonuclear reactions on ${}^{235,238}$U and ${}^{239}$Pu are calculated with the Hauser-Feshbach Fission Fragment Decay (HF${}^3$D) model and compared with available experimental data. In the analysis of neutron-induced fission reactions to the case of photo-induced fission, an excellent reproduction of the delayed neutron yields supports a traditional assumption that the photo-fission might be similar to the neutron-induced fission at the same excitation energies regardless of the spin and parity of the fissioning systems.

References in corpus (8)

• Fission Fragment Decay Simulations with the CGMF Code
• Fission fragments intrinsic spins and their correlations
• Estimation of M1 scissors mode strength for deformed nuclei in the medium to heavy mass region by statistical Hauser-Feshbach model calculations
• Angular Momentum of Fission Fragments from Microscopic Theory
• Extension of the Hauser-Feshbach Fission Fragment Decay Model to Multi-Chance Fission
• Late Time Emission of Prompt Fission Gamma Rays
• Unified description of the coupled-channels and statistical Hauser-Feshbach nuclear reaction theories for low energy neutron incident reactions
• Non-iterative finite amplitude methods for E1 and M1 giant resonances

Cited by in corpus (2)

• Postfission properties of uranium isotopes: A hybrid method with Langevin dynamics and the Hauser-Feshbach statistical model
• Disentangling the influence of excitation energy and compound nucleus angular momentum on fission fragment angular momentum