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Publication
Journal of Physics B: Atomic and Molecular Physics
Paper
Resonances, cusp effects and a virtual state in e--He scattering near the n=3 thresholds
Abstract
Variational calculations locate and identify resonances and new threshold structures in electron impact excitation of He metastable states, in the region of the 33S and 31S excitation thresholds. A virtual state is found at the 33S threshold.