Resonance in positron-helium scattering at medium energy
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Undergraduate course
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Iop Publishing Ltd
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Letter
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Acesso aberto
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Abstract
A narrow S-wave resonance has been found in the positron-helium system at about 30 eV, using the close-coupling approach, in excitation and rearrangement cross sections to He(1s2s), He(1s2p), Ps(1s) and Ps(2s) states by employing different combinations of the following basis functions: He(1s1s), He(1s2s), He(1s2p), Ps(1s) and Ps(2s), where Ps stands for the positronium atom.
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English
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Journal of Physics B-atomic Molecular and Optical Physics. Bristol: Iop Publishing Ltd, v. 30, n. 2, p. L81-L85, 1997.
