Zero-width resonances in the context of Fano's configuration interaction formalism

ABSTRACT

We examine how to link two approaches for resonance width calculations, in a situation of crossing of two diatomic molecular potentials. One is the semiclassical formalism of Child. The other is Fano's configuration interaction approach leading to the Fermi golden rule. We build a case where the vanishing of the width in the two formalisms can be reduced to the same conditions.

GRAPHICAL ABSTRACT

Keywords:

• Resonances
• photodissociation
• semiclassical formalism
• configuration interaction
• curve-crossing

PACS CLASSIFICATIONS:

• 33.80.-b
• 33.80.Gj
• 42.25.Hz

Disclosure statement

No potential conflict of interest was reported by the authors.