The C̃←X̃ transition in AṙNO, KṙNO, and XėNO studied using resonance-enhanced multiphoton ionization spectroscopy

Abstract

The C̃2Π(vNO′=0)←X̃ 2Π(v″=0) transitions in AṙNO and KṙNO are investigated using (2+1) resonance-enhanced multiphoton ionization (REMPI) spectroscopy. The spectra consist of vibrational progressions, each member of which is seen to have a reproducible pattern of much closer spaced features; the latter are assigned as rotational structure associated with the a inertial axis of a near T-shaped complex. The spectra are successfully simulated using this model, which yields information on the geometry of the molecular complex in these vibronic states. Comparison is made with previously reported spectra for the C̃2Π(vNO′=1and2)←X̃2Π(vNO″=0) transition. The corresponding spectrum for XėNO is also discussed. © 1998 American Institute of Physics.