Abstract
The positions and the widths of 21 2Po resonances in Be II between 1 1S0 and 2 1P thresholds are calculated using a saddle-point complex-rotation method. Relativistic and mass polarization corrections to the autoionization energy are included. Below threshold (1s2s)3S our results agree well with other calculations and experiments. We make an identification of states above the (1s2s)3S threshold. For the region above 2 3S, our present results for Be II are contrasted with those for Li I (Wu L J and Chung K T 1997 J. Phys. B: At. Mol. Opt. Phys. 30 1173). We discuss the dependence of the widths on the atomic number.
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