Structure effects on fission yields

TL;DR

This paper investigates how nuclear structure influences fission fragment yields at various temperatures using statistical models and compares results from TRMF and finite range droplet models, revealing temperature-dependent shape effects.

Contribution

It introduces a detailed analysis of structure effects on fission yields at finite temperatures using TRMF and compares with the finite range droplet model, highlighting temperature-dependent shape transitions.

Findings

Structural effects are significant at 1-2 MeV temperatures.

Fragments tend to become spherical at 3 MeV.

Yields peak near closed-shell nuclei at higher temperatures.

Abstract

The structure effects of the fission fragments on their yields are studied within the statical theory with the inputs, like, excitation energies and level density parameters for the fission fragments at a given temperature calculated using the temperature dependent relativistic mean field formalism (TRMF). For the comparison, the results are also obtained using the finite range droplet model. At temperatures $T =1-2$ MeV, the structural effects of the fission fragments influence their yields. It is also seen that at $T = $ 3 MeV, the fragments become spherical and the fragments distribution peaks at a close shell or near close shell nucleus.