Doubly excited resonant states in H- below the n = 2 hydrogen threshold

We calculated the (2sns) 1Se (n = 2,3,4), (2sns) 3Se (n 3,4,5), (2snp) 1po (n = 3,4), (2snp) 3po (n = 2,3,4) and 2p21De autoionizing states in H- 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. (Author)