Vibrational branching ratios in photoionization of CO and N2

G J Rathbone; R M Rao; E D Poliakoff; Kwanghsi Wang; V McKoy

doi:10.1063/1.1631818

Vibrational branching ratios in photoionization of CO and N2

J Chem Phys. 2004 Jan 8;120(2):778-80. doi: 10.1063/1.1631818.

Authors

G J Rathbone¹, R M Rao, E D Poliakoff, Kwanghsi Wang, V McKoy

Affiliation

¹ Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, USA.

PMID: 15267913
DOI: 10.1063/1.1631818

Abstract

We report results of experimental and theoretical studies of the vibrational branching ratios for CO 4sigma(-1) photoionization from 20 to 185 eV. Comparison with results for the 2sigma(u)(-1) channel of the isoelectronic N2 molecule shows the branching ratios for these two systems to be qualitatively different due to the underlying scattering dynamics: CO has a shape resonance at low energy but lacks a Cooper minimum at higher energies whereas the situation is reversed for N2.