Experimental and theoretical velocity profiles for pure rotational scattering: CO–hot hydrogen atom collisions

Publisher Website
Google Scholar
Abstract
Time dependent diode laser spectroscopy was used to measure Doppler profiles of P-branch lines in the fundamental vibrational band of CO shortly after collisions with H atoms having a translational energy of 2.3 eV. Observed spectral line profiles reflect two Doppler components, a negative room temperature component from molecules scattered out of a given v=0, J state, and a hot component from molecules scattered into the same state. Observed profiles are explained qualitatively using state-to-state differential cross sections calculated from the ab initio potential energy surface of Bowman, Bittman, and Harding and a rigid rotor coupled states quantum scattering approximation.