LASER FLUORESCENCE EXCITATION SPECTROSCOPY OF THE Ar-HCO COMPLEX
Loading...
Date
1997
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Ohio State University
Abstract
The fluorescence excitation spectrum of the Ar-HCO van der Waals complex in the vicinity of the $\tilde{B}^{2} A^{\prime} (000)-\tilde{X}^{2} A^{\prime}(000)$ band of free HCO is reported. At least 8 bands associated with the complex have been detected. We observe a spectral shift of the lowest energy Ar-HCO band with respect to the origin of the free HCO transition, and from this estimate the binding energy in the excited electronic state to be at least $10 cm^{-1}$ greater than that in the ground state. Rotational analysis of some of the bands has been carried out, and average Ar-HCO separations in both electronic states determined. Several of the bands were assigned as hot bands from the first excited bend-stretch level $(K^{\prime\prime} = 1)$ in the ground electronic state. Decay lifetimes of several Ar-HCO $(\tilde{B})$ levels were found to be somewhat smaller than those previously measured for free HCO.
Description
Author Institution: Department of Chemistry, The Johns Hopkins University