Hyperfine, rotational, and vibrational structure of the triplet ground state of Rb molecules
Atomic Physics
2011-07-18 v2 Other Condensed Matter
Abstract
We have performed high-resolution two-photon dark-state spectroscopy of an ultracold gas of Rb molecules in the triplet ground state at a magnetic field of about 1000 G. The vibrational ladder as well as the hyperfine and low-lying rotational structure is mapped out. Energy shifts in the spectrum are observed due to singlet-triplet mixing at binding energies as deep as a few hundred GHz x h. This information together with data from other sources is used to optimize the potentials of the triplet and singlet states in a coupled-channel model. We find that the hyperfine structure depends weakly on the vibrational level. This provides a possible explanation for inaccuracies in recent Feshbach resonance calculations.
Keywords
Cite
@article{arxiv.1009.2075,
title = {Hyperfine, rotational, and vibrational structure of the triplet ground state of Rb molecules},
author = {Christoph Strauss and Tetsu Takekoshi and Florian Lang and Klaus Winkler and Rudolf Grimm and Johannes Hecker Denschlag and Eberhard Tiemann},
journal= {arXiv preprint arXiv:1009.2075},
year = {2011}
}