Vibronic spectrum of 15N16O2 between 415 and 440Â nm

The time gated laser induced fluorescence (LIF) excitation spectrum of adiabatically cooled 15N16O2 has been measured close to the dissociation limit (22 700-24 050 cm−1). The spectrum consists of numerous rotationally resolved vibronic bands with mainly irregular structures and consequently only an angular momentum labeling has been possible. These rotationally assigned isolated transitions, however, are highly suited for laser induced dispersed fluorescence spectroscopy (LIDFS) that gives spectroscopic access to the more regular parts of the electronic 15N16O2 spectrum. Accurate lists with transition frequencies-mainly R(0) and R(2) transitions-are provided.