Elastic breakup cross sections of well-bound nucleons

TL;DR

This study investigates the elastic breakup cross sections of well-bound protons in a 9Be(28Mg,27Na) reaction at intermediate energy, comparing experimental data with theoretical models to understand the breakup mechanisms.

Contribution

It provides the first detailed analysis of elastic breakup contributions for well-bound protons and compares experimental results with eikonal model predictions.

Findings

Elastic and inelastic contributions are quantified and compared.

Measured elastic breakup fractions agree well with theoretical predictions.

Transitions between bound configurations significantly influence the elastic breakup cross section.

Abstract

The 9Be(28Mg,27Na) one-proton removal reaction with a large proton separation energy of Sp(28Mg)=16.79 MeV is studied at intermediate beam energy. Coincidences of the bound 27Na residues with protons and other light charged particles are measured. These data are analyzed to determine the percentage contributions to the proton removal cross section from the elastic and inelastic nucleon removal mechanisms. These deduced contributions are compared with the eikonal reaction model predictions and with the previously measured data for reactions involving the re- moval of more weakly-bound protons from lighter nuclei. The role of transitions of the proton between different bound single-particle configurations upon the elastic breakup cross section is also quantified in this well-bound case. The measured and calculated elastic breakup fractions are found to be in good agreement.