Abstract
We report theoretical calculations of doubly excited states for He I, Li II, and Be III below the N = 2 thresholds. Energy levels for autoionizing states are determined by a method of complex-coordinate rotation. Energy levels for non-autoionizing states are determined by the standard variational method, or taken from the best variational results in the literature. The theoretical transition wavelengths among various doubly excited states are compared with those observed in beam-foil experiments.
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