Relativistic calculations of the isotope shifts in highly charged Li-like ions

TL;DR

This paper presents relativistic calculations of isotope shifts in highly charged Li-like ions, incorporating nuclear recoil, size, deformation, and polarization effects, and compares results with other theoretical approaches.

Contribution

It introduces a combined perturbative and CI-DFS method to accurately compute isotope shifts including various nuclear and QED effects.

Findings

Calculated isotope shifts for Nd, Th, U ions agree with other theoretical values.

Nuclear deformation and polarization significantly affect isotope shifts.

The method improves accuracy of isotope shift predictions in highly charged ions.

Abstract

Relativistic calculations of the isotope shifts of energy levels in highly charged Li-like ions are performed. The nuclear recoil (mass shift) contributions are calculated by merging the perturbative and large-scale configuration-interaction Dirac-Fock-Sturm (CI-DFS) methods. The nuclear size (field shift) contributions are evaluated by the CI-DFS method including the electron-correlation, Breit, and QED corrections. The nuclear deformation and nuclear polarization corrections to the isotope shifts in Li-like neodymium, thorium, and uranium are also considered. The results of the calculations are compared with the theoretical values obtained with other methods.