Dependence of Transition Moment on Internuclear Separation inNa2

Abstract

The electronic transition moment between the $B{}_{}{}^1{}_{}{}^{}\Pi _{\mathrm{u}}^{}{}_{}{}^{}$ and $X{}_{}{}^1{}_{}{}^{}\Sigma _{\mathrm{g}}^{}{}_{}{}^{}$ states of the ${\mathrm{Na}}_2$ dimer is measured as a function of internuclear separation by monitoring the laser-induced atomic fluorescence signal.