A combination of pulsed depletion spectroscopy and photoassociation spectroscopy is utilized to assign photoassociation spectra of NaCs. These methods investigate the ab initio Ω = 2 potential energy curve and indicate a previously unknown avoided crossing between the (3)Ω = 1 and (4)Ω = 1 electronic states. We present rotational assignments of deeply bound singlet ground state molecules, an improved C6 coefficient for the (4)Ω = 1 and assignments for all twenty-three photoassociation resonances detuned from the Cs 62P3/2 asymptote.
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Physical Chemistry Chemical Physics
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