TL;DR
This paper derives a simple formula to describe Coulomb effects on proton radii in nuclei near N≈Z, comparing it with Skyrme Hartree-Fock calculations to understand neutron-proton radius differences.
Contribution
It introduces a new simple formula for Coulomb effects on proton radii and compares it with detailed Skyrme Hartree-Fock calculations.
Findings
The formula accurately describes the Coulomb influence on proton radii.
It estimates the neutron-proton radius difference in N≈Z nuclei.
It provides insights into radius differences in nuclei with large neutron excess.
Abstract
A simple formula is derived that describes how the Coulomb interaction affects the proton radius in nuclei. It determines the difference between neutron and proton radii in nuclei with N approx Z. It also provides an estimate for the difference between the radii of the Z core neutrons and the protons in nuclei with a large neutron excess. The results obtained from the derived formula are compared with radii calculated in a Skyrme Hartree-Fock calculation.
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