Physics – Atomic Physics
Scientific paper
2011-04-19
Physics
Atomic Physics
10 pages, 7 figures, 2 tables
Scientific paper
We present the results of an experimental and theoretical study of the electronically excited $\tripletex$ state of $^{87}$Rb$_2$ molecules. The vibrational energies are measured for deeply bound states from the bottom up to $v'=15$ using laser spectroscopy of ultracold Rb$_2$ Feshbach molecules. The spectrum of each vibrational state is dominated by a 47\,GHz splitting into a $\cog$ and $\clg$ component caused mainly by a strong second order spin-orbit interaction. Our spectroscopy fully resolves the rotational, hyperfine, and Zeeman structure of the spectrum. We are able to describe to first order this structure using a simplified effective Hamiltonian.
Denschlag Johannes Hecker
Lang Florian
Lysebo M.
Strauss César
Takekoshi Tatsuya
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