%0 Journal Article
%T Nonlinear Zeeman effect in photoassociation spectra of $^{40}$Ca near the $^3$P$_1$+$^1$S$_0$ asymptote
%A Eberhard Tiemann
%A Max Kahmann
%A Evgenij Pachomow
%A Fritz Riehle
%A Uwe Sterr
%J Physics
%D 2015
%I arXiv
%R 10.1103/PhysRevA.92.023419
%X We present calculations of the Zeeman effect of narrow photoassociation lines of $^{40}$Ca near the $^3$P$_1$ + $^1$S$_0$ asymptote. Using a coupled-channel model we find a nonlinear Zeeman effect that even at low fields of a few mT amounts to several kHz. With this model we analyze previous measurements and give corrected long range dispersion coefficients of the $^3\Pi_{u}$ and $^3\Sigma^+ _{u}$ states.
%U http://arxiv.org/abs/1506.04004v1