Energy Dependent Prompt Neutron Multiplicity Parameterization for Actinide Photofission

TL;DR

This paper develops a parameterization model for the prompt neutron multiplicity in actinide photofission, capturing energy and fragment mass dependencies to improve predictions across isotopes.

Contribution

It introduces a new parameterization approach for prompt neutron yield in actinide photofission, accounting for energy dependence and fragment mass.

Findings

Successfully describes saw-tooth neutron yield behavior

Predicts neutron multiplicity for various actinide isotopes

Provides a model adaptable to different energy ranges

Abstract

The prompt neutron averaged number and the dependence of prompt neutron yield on fragment mass {\nu}(A) of photofission of actinide nuclei 235U and 238U in the giant dipole resonance energy range has been parameterized. This allows us to describe the observed changes of saw-tooth behavior of neutron yield from the light and heavy fragments using few energy and nucleon composition dependent free parameters and to predict {\nu}(A) for other actinide isotopes.