Energies, widths and spectral features of the 3Pe resonances of H-

The resolution of the spectrum of P-3 H- up to the n = 5 threshold has been achieved to very high accuracy via the state-specific solution of the complex eigenvalue Schrodinger equation, using as a cut-off limit resonance states of widths of about 10(-9) au. In this energy region and for this cut-off value, we identified one discrete state, the 2p(2) P-3 and 31 resonance states. We show how an appropriate analysis of the energies, widths and wavefunction characteristics leads to the classification of series of states into unperturbed and perturbed, using the Gailitis-Damburg dipole resonance approximation as the zero-order model. Two loner states are present: the discrete state below the n = 2 threshold and a resonance state below the n = 4 threshold, which overlaps the third member of the dipole resonance series.