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Phys. Rev. A 48, R1745–R1748 (1993)

Observation of enhanced emission of cusp electrons at impact of excited metastable neutral He projectiles

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M. Kuzel
Institut für Kernphysik der J. W. Goethe-Universität, August-Euler Strasse 6, D-6000 Frankfurt am Main, Germany

L. Sarkadi, J. Pálinkás, and P. A. Závodszky
Institute of Nuclear Research of the Hungarian Academy of Sciences, P.O. Box 51, H-4001 Debrecen, Hungary

R. Maier
Institut für Kernphysik der J. W. Goethe-Universität, August-Euler Strasse 6, D-6000 Frankfurt am Main, Germany

D. Berényi
Institute of Nuclear Research of the Hungarian Academy of Sciences, P.O. Box 51, H-4001 Debrecen, Hungary

K. O. Groeneveld
Institut für Kernphysik der J. W. Goethe-Universität, August-Euler Strasse 6, D-6000 Frankfurt am Main, Germany

Received 19 May 1993; published in the issue dated September 1993

The contribution of excited metastable He projectiles to the production of the forward electron cusp peak has been measured for bombardment of Ar by 400-keV neutral He atoms using the technique of collisional quenching to control the metastable fraction of the beam. The cross section for the production of cusp electrons via target ionization by metastable He atoms has been found to be about 10 times larger than the cross section for the same process for ground-state projectiles.

© 1993 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevA.48.R1745
DOI:
10.1103/PhysRevA.48.R1745
PACS:
34.70.+e
 
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