LASER FLUORESCENCE AND HIGH VIBRATIONAL LEVELS OF NO-15(2)

Resonance fluorescence of **1**5NO//2 excited by narrow-band radiation of an Ar** plus laser at 514, 495, 488, and 476 nm is reported and analyzed. The data are combined with published laser magnetic resonance and infrared measurements to obtain a set of vibration and vibration-rotation constants for the electronic ground state of this isotope. The fluorescence bands reported are a-axis polarized. Numerous anomalies in the vibrational and rotational structure of the fluorescence indicate that, in the region of the manifold probed by the laser, vibrational levels of the parent **2B//2 basis state mix extensively with one another as well as with high vibrational levels of the **2A//1 ground state.