On limits of ab initio calculations of pairing gap in nuclei

TL;DR

This paper reviews recent microscopic calculations of nuclear pairing gaps and proposes a semi-microscopic model that combines ab-initio interactions with a universal phenomenological correction, validated across various nuclei.

Contribution

It introduces a semi-microscopic model with a universal parameter to improve ab-initio pairing gap calculations in nuclei.

Findings

Model fits well across multiple isotopic and isotonic chains

The phenomenological addendum enhances the accuracy of microscopic calculations

Universal parameter applies to all medium and heavy nuclei

Abstract

A brief review of recent microscopic calculations of nuclear pairing gap is given. A semi-microscopic model is suggested in which the ab-initio effective pairing interaction is supplemented with a small phenomenological addendum. It involves a parameter which is universal for all medium and heavy nuclei. Calculations for several isotopic and isotonic chains of semi-magic nuclei confirm the relevance of the model.