Supermultiplet structure of the doubly excited positronium negative ion - art. no. 032501

Doubly excited intrashell resonance states of positronium negative ion, Ps( -) associated with the N=4 and N=5 thresholds of Ps atom are calculated usi ng the method of complex-coordinate rotation. Products of Slater-type orbit als are used to represent the two-electron wave functions. All possible int rashell states with angular momenta up to L=6 and L=8 for N=4 and N=5 thres holds, respectively, have been identified. Supermultiplet structures showin g the rotational and vibrational character of the doubly excited resonance states of Ps(-) are constructed.