Relativistic coupled-cluster studies of ionization potentials, lifetimes and polarizabilities in singly ionized calcium

TL;DR

This paper employs the relativistic coupled-cluster method to accurately compute ionization potentials, lifetimes, and polarizabilities of singly ionized calcium, including Breit interaction effects, and compares theoretical results with experimental data.

Contribution

It presents the first comprehensive relativistic coupled-cluster calculations of multiple properties of Ca$^+$, explicitly including Breit interaction contributions and black-body radiation shifts.

Findings

Calculated ionization potentials and polarizabilities agree well with experimental data.

Provided detailed lifetimes and branching ratios for excited states.

Quantified the impact of Breit interaction on atomic properties.

Abstract

Using the relativistic coupled-cluster method, we have calculated ionization potentials, E1 matrix elements and dipole polarizabilities of many low-lying states of Ca$^+$. Contributions from the Breit interaction are given explicitly for these properties. Polarizabilities of the ground and the first excited d-states are determined by evaluating the wave functions that are perturbed to first order by the electric dipole operator and the black-body radiation shifts are estimated from these results. We also report the results of branching ratios and lifetimes of the first excited p-states using both the calculated and experimental wavelengths and compare them with their measured values.