Hyperfine, rotational, and vibrational structure of the a 3 Σ u + state of Rb 87 2
Hyperfine, rotational, and vibrational structure of the a 3 Σ u + state of Rb 87 2
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DOI：
10.1103/physreva.82.052514
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发表时间：
2010-09
影响因子：
2.9
通讯作者：
C. Strauss;T. Takekoshi;F. Lang;K. Winkler;R. Grimm;J. Denschlag;E. Tiemann
中科院分区：
文献类型：
--
作者：
C. Strauss;T. Takekoshi;F. Lang;K. Winkler;R. Grimm;J. Denschlag;E. Tiemann
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.
