Partial widths of the resonances of the H- 1P0 two-electron ionization ladder

Abstract

The resonance wavefunctions of two-electron ionization ladder (TEIL) states can be identified a priori and computed to a high degree of accuracy from the solution of the complex eigenvalue Schrodinger equation. Depending on the form of the trial functions and on the concomitant non-Hermitian matrices, energies, energy shifts and partial widths can be obtained. The authors present the first predictions for the partial widths of the 1P0 TEIL states in H-, for n=3, 4 and 5, from calculations which include interchannel coupling. As before for the 1S symmetry, their analysis of the decay distribution shows that most of the width goes to the nearest hydrogenic threshold, while within each threshold there is strong mixing of the angular momentum channels. As n increases, the lifetime increases while it is given with increasing accuracy by the decoupled width (i.e. golden rule) to the nearest hydrogenic threshold.