The RbSr 2Σ+ ground state investigated via spectroscopy of hot and ultracold molecules.

摘要: We report on spectroscopic studies of hot and ultracold RbSr molecules, combine the results in an analysis that allows us to fit a potential energy curve (PEC) for X(1)2Σ+ ground state bridging short-to-long-range domains. The molecules are created μK sample Rb Sr atoms probed by two-colour photoassociation spectroscopy. data yield long-range dispersion coefficients C6 C8, along with total number supported bound levels. 1000 K gas mixture heat-pipe oven thermoluminescence laser-induced fluorescence compare molecule spectra we simulated using previously published PECs determined three different ab initio theoretical methods. identify several band heads corresponding radiative decay from B(2)2Σ+ deepest levels X(1)2Σ+. determine mass-scaled high-precision model fitting all single procedure. PEC is consistent data, thus spanning short-to-long internuclear distances gap about 75% well depth, still uncharted any experiment. benchmark previous against our results, give parameters both states. As first outcomes analysis, calculate s-wave scattering properties stable isotopic combinations corroborate locations Fano–Feshbach resonances between alkali closed-shell recently observed [V. Barbe et al., Nat. Phys., 2018, 14, 881]. These more generally strategy should greatly contribute generation alkali–alkaline-earth dimers, whose applications range quantum simulation state-controlled chemistry.