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Title: Empirical LiK excited state potentials: Connecting short range and near dissociation expansions
Authors: Botsi, Sofia
Yang, Anbang 
Kumar, Sunil 
Lam, Mark 
Pal, Sambit 
Debatin, Markus 
Dieckmann, Kai 
Keywords: physics.atom-ph
Issue Date: 14-Feb-2022
Publisher: Royal Society of Chemistry (RSC)
Citation: Botsi, Sofia, Yang, Anbang, Kumar, Sunil, Lam, Mark, Pal, Sambit, Debatin, Markus, Dieckmann, Kai (2022-02-14). Empirical LiK excited state potentials: Connecting short range and near dissociation expansions. Physical Chemistry Chemical Physics 24 (6) : 3933-3940. ScholarBank@NUS Repository.
Abstract: We report on a high-resolution spectroscopic survey of 6Li40K molecules near the 2S + 4P dissociation threshold and produce a fully empirical representation for the B1Π potential by connecting available short- and long-range data. The purpose is to identify a suitable intermediate state for a coherent Raman transfer to the absolute ground state, and the creation of a molecular gas with dipolar interactions. Starting from weakly bound ultracold Feshbach molecules, the transition frequencies to twenty-six vibrational states are determined. Our data are combined with long-range measurements [Ridinger et al., EPL, 2011, 96, 33001], and near-dissociation expansions for the spin-orbit coupled potentials are fitted to extract the van der Waals C6 dispersion coefficients. A suitable vibrational level is identified by resolving its Zeeman structure and by comparing the experimentally attained g-factor to our theoretical prediction. Using mass-scaling of the short-range data for the B1Π [Pashov et al., Chem. Phys. Lett., 1998, 292, 615620] and an updated value for its depth, we model the short- and the long-range data simultaneously and produce a Rydberg-Klein-Rees curve covering the entire range. This journal is
Source Title: Physical Chemistry Chemical Physics
ISSN: 14639076
DOI: 10.1039/d1cp04707h
Appears in Collections:Staff Publications

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