Abstract
An adiabatic treatment in hyperspherical coordinates is used to predict the existence of resonant structures in (Ps denotes positronium) photodetachment. This highly correlated system displays a weak series of narrow Feshbach resonances lying just below the threshold, while a single strong shape resonance dominates the photodetachment spectrum above this threshold as in . Use of a "prediagonalized" representation of hyperspherical harmonics dramatically improves the convergence of the adiabatic calculation.
- Received 10 January 1986
DOI:https://doi.org/10.1103/PhysRevLett.56.1366
©1986 American Physical Society