Rathbone GJ, Rao RM, Poliakoff ED, Wang K, McKoy V. Vibrational branching ratios in photoionization of CO and N2.
J Chem Phys 2004;
120:778-80. [PMID:
15267913 DOI:
10.1063/1.1631818]
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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.
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