Polarizabilities, Stark shifts, and lifetimes of In atom

TL;DR

This paper calculates polarizabilities, Stark shifts, and lifetimes of indium atom states using high-precision relativistic methods, providing results that agree with experiments and enabling accurate lifetime predictions.

Contribution

It introduces and compares two advanced relativistic computational methods for indium atom properties, improving accuracy and uncertainty estimates.

Findings

Excellent agreement with experimental Stark shift measurements.

Determination of 6p_{1/2} and 6p_{3/2} lifetimes with 0.8% accuracy.

Predictions for polarizabilities to aid future lifetime measurements.

Abstract

We evaluate the polarizabilities of the 5p_{1/2}, 6s, 6p_{1/2}, and 6p_{3/2} states of In using two different high-precision relativistic methods: linearized coupled-cluster approach where single, double and partial triple excitations of the Dirac-Fock wave function are included to all orders of perturbation theory and an approach that combines the configuration interaction and the coupled-cluster method. Extensive comparison of the accuracy of these methods is carried out. The uncertainties of all recommended values are evaluated. Our result for the 6s-5p_{1/2} Stark shift is in excellent agreement with the recent measurement [Ranjit et al., arXiv:1302.0821v1]. Combining our calculation with this precision measurement allows us to infer the values of the 6p_{1/2} and 6p_{3/2} lifetimes in In with 0.8% accuracy. Our predictions for the 6p_{3/2} scalar and tensor polarizabilities may be combined with the future measurement of the 6s-6p_{3/2} Stark shift to accurately determine the lifetimes of the 5d_j states.