Towards heavy-mass ab initio nuclear structure: Open-shell Ca, Ni and Sn isotopes from Bogoliubov coupled-cluster theory

TL;DR

This paper demonstrates the first application of ab initio Bogoliubov coupled cluster calculations to heavy open-shell nuclei, accurately predicting properties of calcium, nickel, and tin isotopes up to mass 180.

Contribution

It introduces a controlled ab initio BCC method for heavy open-shell nuclei, advancing first-principles nuclear structure modeling.

Findings

Good agreement with experimental data for known isotopes

Predictions of shell evolution in neutron-rich isotopes

Locations of neutron drip-lines predicted

Abstract

Recent developments in nuclear many-body theory enabled the description of open-shell medium-mass nuclei from first principles by exploiting the spontaneous breaking of symmetries within correlation expansion methods. Once combined with systematically improvable inter-nucleon interactions consistently derived from chiral effective field theory, modern ab initio nuclear structure calculations provide a powerful framework to deliver first-principle predictions accompanied with theoretical uncertainties. In this Letter, controlled ab initio Bogoliubov coupled cluster (BCC) calculations are performed for the first time, targeting the ground-state of all calcium, nickel and tin isotopes up to mass A ~ 180. While showing good agreement with available experimental data, the shell structure evolution in neutron-rich isotopes and the location of the neutron drip-lines are predicted. The BCC approach constitutes a key development towards reliable first-principles simulations of heavy-mass open-shell nuclei.