Above threshold dissociation of LiNa+: monitoring an avoided crossing with femtosecond spectroscopy

Computer simulations of one- and two-color experiments in above threshold dissociation (ATD) are reported for the first heteronuclear alkali ion LiNa+. We focus on the 12Σ+→12Π→4,52Σ+ process, with dissociation to Li++Na(3p) or Li(3s)+Na+. The product yields are determined by the presence of an avoided crossing between the 4 and 52Σ+ potential curves, according to the frequency and delay of the second laser pulse.