Vibrational autoionization in polyatomic molecules
- Laboratoire Aime Cotton, CNRS, Universite de Paris-Sud, 91405 Orsay (France)
- Argonne National Laboratory, Argonne, Illinois 60439 (United States)
A general framework for vibrational autoionization in polyatomic molecules with nondegenerate ion cores is presented in terms of a nondiagonal quantum defect matrix. The expressions for the vibrational autoionization rate depend on two vibrational-mode-dependent factors; (1) a vibrational {open_quotes}zero-point amplitude{close_quotes} that describes the displacement along a given normal coordinate and (2) a quantum defect derivative that describes the effect of the vibration on the electronic degrees of freedom. The latter is closely related to the dipole moment derivative and thus to the infrared intensity of that mode. This connection provides insight into the recently observed mode dependence of the vibrational autoionization rates for NO{sub 2} and other small molecules. {copyright} {ital 1997 American Institute of Physics.}
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL
- OSTI ID:
- 508955
- Journal Information:
- Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 23 Vol. 106; ISSN JCPSA6; ISSN 0021-9606
- Country of Publication:
- United States
- Language:
- English
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