Anomalies in the rotational spectra of 86Sr ULRRM dimers
Abstract
Anomalies in the rotational structure of 86Sr 3S1 dimer ultralong-range Rydberg molecules (ULRRMs) created in a cold strontium gas by two-photon excitation via the intermediate 5s5p~3P1 state are reported. Measurements reveal that the distribution of product rotational states is sensitive to intermediate state detuning. Comparative studies using 84Sr 1S0 and 3S1, and 86Sr 1S0 dimers display no similar behavior, indicating that the observed behavior is peculiar to 86Sr triplet dimers. While we have no definitive hypothesis as to the physical mechanism responsible for this behavior, possible explanations might involve the very different scattering lengths for 84Sr and 86Sr, or the interchange of spin and rotational angular momentum.
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