Competition among molecular fragmentation channels described with Siegert channel pseudostates

Details Competition among molecular fragmentation channels described with Siegert channel pseudostates Competition among molecular fragmentation channels described with Siegert channel pseudostates

2002-08-07

arxiv.org/abs/physics/0208030v3

Physics

Atomic Physics

Four pages, with 3 figures, submitted to PRL

Scientific paper

10.1103/PhysRevLett.89.263003

To describe multiple interacting fragmentation continua, we develop a method in which the vibrational channel functions obey outgoing wave Siegert boundary conditions. This paper demonstrates the utility of the Siegert approach, which uses channel energy eigenvalues that possess a negative imaginary part. The electron scattering energy in each such channel is rotated upward, giving it an equal and opposite imaginary part. This permits a natural inclusion of vibrational continua without requiring them to appear as explicit channels in the scattering matrix. Calculations illustrate the application of this theory to photoionization, photodissociation, and dissociative recombination.

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