Abstract

We calculated the (n=2,3,4), (n=3,4,5), (n=3,4), (n=2,3,4) and autoionizing states in below the n = 2 hydrogen threshold by the saddle-point complex-rotation method. The close-channel part of wavefunctions are constructed by B-spline basis functions. The resonance energies and autoionization widths are determined. They are compared with other theoretical and experimental results to examine the feasibility of applying B-spline basis functions through the saddle-point complex-rotation method in resonance states.

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