Dipole-dipole polarizability of the cadmium $\mathbf{^1S_0}$ state revisited

TL;DR

This paper revisits the static polarizability of cadmium's ${^1S_0}$ state, resolving discrepancies between experimental data and high-level calculations by analyzing dipole oscillator strength distributions.

Contribution

It introduces a method using experimentally determined DOSD to refine polarizability measurements, aligning experimental results with theoretical calculations.

Findings

Revised polarizability of 47.5 ± 2.0 au agrees with recent calculations.

Discrepancies between previous experimental and theoretical values are addressed.

Method improves the accuracy of polarizability measurements for atomic states.

Abstract

Experimental results and high-level quantum chemical ab initio calculations of the static polarizability $\alpha_0=\alpha(\omega=0)$ of the cadmium ${^1S_0}$ state are still in marked disagreement. Here we analyze this discrepancy by using experimentally determined dipole oscillator strength distributions (DOSD). It will be shown that within this procedure the experimentally determined static polarizability $\alpha_0$ will shift from $49.7 \pm 1.6~$au to considerably lower values. We now conclude an experimentally determined polarizability of $\alpha_0=47.5 \pm 2.0~$au in much better agreement with the latest calculations of $\alpha_0 \approx 46~$au.