High accuracy photoassociation of $^{40}$Ca near the ${^3P_1}+{^1S_0}$ asymptote and its Zeeman effect

TL;DR

This paper reports precise measurements of photoassociation lines of calcium-40 near a specific asymptote, confirming theoretical models of long-range interactions through detailed experimental and theoretical analysis.

Contribution

First measurement of narrow photoassociation lines of $^{40}$Ca near the ${^3P_1}+{^1S_0}$ asymptote, validating coupled channel theoretical models of long-range potentials.

Findings

Accurate binding energies and Zeeman splittings match theoretical predictions.

Inclusion of both energies and Zeeman splittings is essential for modeling long-range interactions.

Results confirm the accuracy of long-range coefficients in calcium molecular states.

Abstract

We report on the first measurement of narrow photoassociation lines of $^{40}$Ca near the ${^3P_1}+{^1S_0}$ asymptote related to the molecular states $^3\Pi_u$ and $^3\Sigma^+_u$. The highly accurate binding energies and Zeeman splittings are well described by a coupled channel theoretical model, confirming theoretical predictions of long-range coefficients. Our analysis shows that only the inclusion of both energies and Zeeman splittings provides an accurate description of the long-range interaction potentials.