Oscillations due to two-electron exchange during He-Ne collisions

Ne (-)(1s(2)2s(2)2p(5)3s(2)) and He (-)(1s2s(2)) autodetachment peaks in electron spectra arising from He-Ne collisions at energies ranging from 350 eV to 6 keV have been measured. The areas of these two peaks are found to oscillate approximately in antiphase, with a constant wavelength, on a (veloc...

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Bibliographic Details
Published in:Physical review letters 2000-09, Vol.85 (13), p.2713-2716
Main Authors: Planje, WG, Westerveld, WB, Niehaus, A
Format: Article
Language:English
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Summary:Ne (-)(1s(2)2s(2)2p(5)3s(2)) and He (-)(1s2s(2)) autodetachment peaks in electron spectra arising from He-Ne collisions at energies ranging from 350 eV to 6 keV have been measured. The areas of these two peaks are found to oscillate approximately in antiphase, with a constant wavelength, on a (velocity)(-1) scale. It is shown that this behavior can be explained by the "quasiresonance" situation for the separating particles in the channels Ne (-)-He (+) and He (-)-Ne (+). This explanation implies that the oscillations can be understood as being due to the simultaneous "hopping" of two electrons.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.85.2713