SAMOP 2021 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 9: Poster 2
MO 9.1: Poster
Freitag, 24. September 2021, 17:30–19:30, P
LiK B1Π potential: combining short and long range data — •Sofia Botsi1, Anbang Yang1, Sambit B. Pal1, Mark M. Lam1, Sunil Kumar1, Markus Debatin1, and Kai Dieckmann1,2 — 1Centre for Quantum Technologies (CQT), 3 Science Drive 2, Singapore 117543 — 2Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117542
We report on high-resolution spectroscopic measurements of the long-range states of the 6Li40K molecule near the 6Li(22S1/2)+40K(42P3/2) dissociation threshold, which in combination with existing data in the short-range lead to the complete characterization of the B1Π potential. Starting from weakly bound ultracold Feshbach molecules, we perform one-photon loss spectroscopy of the B1Π and record the transition frequencies to twenty-five vibrational levels. Level assignment to the spin-orbit coupled potentials is facilitated by existing data in the long-range and by examining the Zeeman effect for the Hund’s case (c) coupling scheme. The C6 coefficients are deduced by fitting our vibrational energies together with the long-range levels to the LeRoy-Bernstein formula. We present a complete set of data for the Ω=1up state, by combining the long-range measurements with data from the short-range states of the B1Π obtained for the 7Li39K isotopologue. Using mass-scaling, we model the short- and the long-range states simultaneously and produce an improved Rydberg-Klein-Rees curve for the complete potential. 1Ridinger et al., EPL, 2011, 96, 33001, 2Pashov et al., Chem. Phys. Lett., 1998, 292, 615-620