Charge-changing cross sections for $^{42\textrm{--}51}$Ca and effect of charged-particle evaporation induced by neutron removal reaction

TL;DR

This study measures charge-changing cross sections for calcium isotopes and introduces a model including charged-particle evaporation effects, achieving accurate predictions across various energies and isotopes.

Contribution

The paper presents a new model incorporating charged-particle evaporation effects to accurately predict charge-changing cross sections without phenomenological corrections.

Findings

Measured $\sigma_ ext{CC}$ for Ca isotopes at 280 MeV/nucleon.

Model reproduces experimental $\sigma_ ext{CC}$ with ~1 ext% accuracy.

Model explains $\sigma_ ext{CC}$ data across different energies and isotopes.

Abstract

Charge-changing cross sections $\sigma_\mathrm{CC}$ for $^{42\textrm{--}51}$Ca on a carbon target at around 280~MeV/nucleon have been measured. The measured $\sigma_\mathrm{CC}$ values differ significantly from the previously developed calculations based on the Glauber model. However, through introduction of the charged-particle evaporation effect induced by the neutron-removal reaction in addition to the Glauber-model calculation, experimental $\sigma_\mathrm{CC}$ values on $^{12}$C at around 300~MeV/nucleon for nuclides from C to Fe isotopes are all reproduced with approximately 1\% accuracy. This proposed model systematically reproduces $\sigma_\mathrm{CC}$ data without phenomenological corrections, and can also explain experimental $\sigma_\mathrm{CC}$ values obtained in other energy regions.