Line shapes in photoexcitation of triply excited hollow states
Lars Bojer Madsen, P. Lambropoulos
Taking as the point of departure a frequently used experimental detection scheme, we present a derivation of the analytical expressions of the line shapes in partial decay channels pertaining to photoexcitation of triply excited hollow states in atomic lithium with subsequent autoionization into a specific doubly excited state in the singly charged ion. The line shapes represent useful generalizations of the Fano parametrization of the profile of an autoionizing resonance. The line shapes give the positions and widths of the triply excited autoionizing resonances, and carry information about specific partial autoionization widths, and partial asymmetry parameters. It is also shown that a laser-induced transition from the triply excited state to another lower-lying one can be used to gain direct information about partial widths. The schemes are readily implemented experimentally, and would allow for the first measurements of such quantities.
Journal of Physics B Atomic Molecular and Optical Physics•May 2, 2001•10 citations