Electric dipole transition amplitudes for atoms and ions with one valence electron

TL;DR

This paper presents high-precision calculations of electric dipole transition amplitudes in alkali-metal atoms and ions, crucial for fundamental physics tests, with results validated against experimental data showing excellent agreement.

Contribution

The study applies an all-orders correlation potential method to accurately compute E1 transition amplitudes, providing a robust error analysis and high-precision values for several atoms and ions.

Findings

Excellent agreement with experimental data (~0.1% deviation)

High-precision E1 amplitudes for multiple atoms and ions

Implications for atomic parity violation and electric dipole moment studies

Abstract

Motivated by recent measurements for several alkali-metal atoms and alkali-metal-like ions, we perform a detailed study of electric dipole (E1) transition amplitudes in K, Ca+, Rb, Sr+, Cs, Ba+, Fr, and Ra+, which are of interest for studies of atomic parity violation, electric dipole moments, and polarizabilities. Using the all-orders correlation potential method, we perform high-precision calculations of E1 transition amplitudes between low-lying s, p, and d states. We perform a robust error analysis, and compare our calculations to many amplitudes for which there are high-precision experimental determinations. We find excellent agreement, with deviations at the level of ~0.1%. We also compare our results to other theoretical evaluations, and discuss the implications for uncertainty analyses. Further, combining calculations of branching ratios with recent measurements, we extract high-precision values for several E1 amplitudes of Ca+, Sr+, Cs, Fr, and Ra+.