Hyperfine, rotational and Zeeman structure of the lowest vibrational levels of the ${}^{87}$Rb${}_2$ $\tripletex$ state

Abstract

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 $v^{\prime }=15$ 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.

10 pages, 7 figures, 2 tables

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Cited by in corpus (6)

• Model for the hyperfine structure of electronically-excited $\mathrm{KCs}$ molecules
• Polarizability of ultracold ${\text{Rb}}_2$ molecules in the rovibrational ground state of ${\mathrm{a}}^3{\Sigma }_u^{+}$
• Mixing of 0${}^{+}$ and 0${}^{-}$ observed in hyperfine and Zeeman structure of ultracold Rb${}_2$ molecules
• Shedding Light on Three-Body Recombination in an Ultracold Atomic Gas
• Level structure of deeply bound levels of the $c^3{\Sigma }_g^{+}$ state of ${}^{87}{\text{Rb}}_2$
• The C(2)${}^1{\Pi }_u$ state in Rb${}_2$. Observation and deperturbation