Threshold electron-impact ionization mechanism for hydrogen atoms.
The near-threshold evolution of electron-impact ionization of hydrogen is revealed with measurements of the angular and energy correlations of the outgoing electrons down to 0.05 eV. The single-, double-, and triple-differential cross sections in the perpendicular plane are measured simultaneously using a dual wedge-and-strip detector on a single-toroidal energy analyzer, avoiding many experimental problems. The experimental and calculated data are in excellent agreement, within the experimental precision of +/-10%, and provide further evidence that the accurate solution of the Schrödinger equation provides a complete description of the reaction dynamics of near-threshold ionization.
Williams
J F
JF
Centre for Atomic, Molecular and Surface Physics, University of Western Australia, Perth 6009, Australia.
Bartlett
Philip L
PL
Stelbovics
Andris T
AT