Research Papers in Physics and Astronomy


Date of this Version

January 1989


Published by American Physical Society. Phys. Rev. Lett. 62, 407 (1989). Copyright © 1989 American Physical Society. Permission to use.


Quantitative predictions for the doubly differential detachment collisions, 0.5-MeV H-+He→H(n=2)+He*+e-, are provided by use of hyperspherical wave functions for the H-e- system. Individual H-e- hyperspherical channels are identified as producing distinct "cusp," "shape resonance," and/or "shoulder" features in the laboratory-frame cross sections. Moreover, the first quantitative predictions of the expected Gailitis-Damburg dipole-field-induced oscillations in the cross sections above the H(n=2) threshold are presented and distinguished from 1P∘ shape resonance effects.

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