Observation of the nuCH Excited Vibrational Levels in the Ã1A" State of HCP by IR-UV Double Resonance Spectroscopy.
Rovibrational levels with one quantum of CH stretch mode, (1, v2, v3), in the Ã1A" electronic state of HCP were observed for the first time by IR-UV double resonance spectroscopy. Nine vibrational levels were identified in the energy region of 37 500-40 800 cm-1. Perturbations similar to those in the (0, v2, v3) levels were also observed in many of the vibrational levels. It was found that the CH stretch frequency in the Ã1A" state is reduced about 270 cm-1 relative to that of the electronic ground state. Copyright 1999 Academic Press.
Ishikawa
H
Graduate School of Science, Tohoku University, Aoba-ku, Sendai, 980-8578, Japan
Nagao
C
Mikami
N