2 golden rule method to calculate partial widths for the decay of resonance states

Susan C. Tucker, Donald G. Truhlar

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

We have calculated resonance energies and partial widths for two two-dimensional models of van der Waals molecule predissociation. We use a general method involving only Hamiltonian and overlap integrals in a square integrable (ℒ2) basis set containing a scale parameter. We use a stabilization method with a compactness criterion to find the resonance energies, and a decoupled golden rule method to find the partial widths. The results are compared to accurate energies and partial widths obtained by fitting solutions of the close-coupling equations to multichannel Breit-Wigner expressions. We studied resonances having two open channels for two sets of potential parameters, and in each case we obtained an accuracy of 16% or better for both partial widths by the ℒ2 method.

Original languageEnglish (US)
Pages (from-to)3667-3677
Number of pages11
JournalThe Journal of chemical physics
Volume88
Issue number6
DOIs
StatePublished - Jan 1 1988

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