Research Papers in Physics and Astronomy


Date of this Version

May 1985


Published in Phys. Rev. A 31, 2854 - 2884 (1985) [Issue 5 – May 1985]. ©1985 The American Physical Society. Used by permission.


Using crossed beams of polarized electrons and polarized hydrogen atoms we have investigated the effect of spin exchange on 90° elastic scattering from 4.4 to 30.3 eV and impact ionization from 14.1 to 197.0 eV. Our results suggest that the range of validity of various theoretical approximation methods is more restricted than had been assumed previously.

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