Photonuclear reactions on stable isotopes of cadmium and tellurium at bremsstrahlung end-point energies of 10-23 MeV

TL;DR

This study investigates photonuclear reactions on cadmium and tellurium isotopes at energies of 10-23 MeV using gamma-activation, comparing experimental yields with theoretical models to improve understanding of nuclear decay processes.

Contribution

It introduces the importance of isospin splitting in theoretical models to accurately describe proton escape reactions at higher energies.

Findings

Isospin splitting improves the description of proton escape reactions.

Discrepancies observed in neutron channels for cadmium isotopes.

Experimental data highlight the need for refined models in photonuclear reactions.

Abstract

This work used the {\gamma}-activation approach to conduct tests at bremsstrahlung end-point energies of 10-23 MeV utilising the MT-25 microtron beam. The experimental values of relative yields and cross sections per equivalent quantum of photonuclear reactions on stable isotopes of cadmium and tellurium were compared to theoretical calculations obtained from TALYS-2.0 using the default parameters and a combined model of photonucleon reactions (CMPR). The inclusion of isospin splitting in the combined model of photonucleon reactions allows for the description of experimental data on proton escape reactions with energies ranging from 17 to 23 MeV. As a result, isospin splitting must be taken into consideration in order to accurately describe the decay of the giant dipole resonance. For Cd isotopes, essential discrepancies of yet unclear origin between theory (TALYS 2.0 and CMPR) and experimental data are found in the neutron channel.