Autoionization decay and radiative decay for doubly excited 1Po resonance states in H- and Ps- ions

The autoionization decay (AD) and radiative decay (RD) for doubly excited P-1(o) resonance states in H- and Ps(-) are studied using correlated exponential wavefunctions based on the variational methods. To trace the resonance poles from Ps(-) to H-, the nuclear mass is varied from one unit to infinitely heavy. Resonance positions, widths related to AD rates, oscillator strengths, the ratios of oscillator strengths between the Feshbach and shape resonances (FSR), RD rates for the lowest two FSR in the P-1(o) spectrum, are reported. Few results are new, and others are comparable with the available theoretical and experimental data.