Isovector density and isospin impurity in 40Ca

We study isoscalar (IS) and isovector (IV) densities in Ca-40 in comparison with theoretical densities calculated by Skyrme Hatree-Fock (HF) models. The charge symmetry breaking and the charge independence breaking forces are introduced to study the effect on the IV density. The effect of isospin mixing in the ground-state density is examined by using the particle-vibration coupling model taking into account the collective IV giant monopole excitation. We show a clear correlations in the IV density and isospin impurity of Ca-40 within the HF and the particle-vibration coupling model. We extract for the first time the experimental information of isospin impurity from the magnitude of IV density. (C) 2022 The Author(s). Published by Elsevier B.V.

Automated summary

We studied the isoscalar and isovector densities in Ca-40 and compared them with theoretical densities calculated using Skyrme Hartree-Fock (HF) models. We introduced charge symmetry breaking and charge independence breaking forces to investigate their effects on the isovector density. Furthermore, we examined the effect of isospin mixing in the ground-state density by using a particle-vibration coupling model that takes into account the collective isovector giant monopole excitation. The results showed clear correlations between the isovector density and isospin impurity in Ca-40 within both the HF and particle-vibration coupling model. Additionally, we extracted experimental information on isospin impurity for the first time from the magnitude of the isovector density.