What happens to two-electron resonances when their energy approaches the break-up threshold?
Fakultät für Physik,
Universität Freiburg, Hermann-Herder-Str. 3, D-79104 Freiburg, Germany
Accepted: 16 May 1996
Using semiclassical S-matrix theory in a simulated electron-hydrogen scattering experiment and converged quantum calculations for the widths of high-lying resonances in we show that resonance formation (or the lifetime of resonances) below the fragmentation threshold E=0 and ionization above threshold have the same energy dependence for . Hence, series of resonances which have been characterized by approximate quantum numbers will disappear towards threshold.
PACS: 34.80.Dp – Atomic excitation and ionization by electron impact / 03.65.Sq – Semiclassical theories and applications / 31.10.+z – Theory of electronic structure, electronic transitions, and chemical binding
© EDP Sciences, 1996