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Phys. Rev. A 62, 052901 (2000) [4 pages]

Electron emission during grazing H0-LiF(001) collisions

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H. Eder
Institut für Allgemeine Physik, Technische Universität Wien, Wiedner Hauptstrasse 8-10, A-1040 Vienna, Austria

A. Mertens, K. Maass, and H. Winter
Institut für Physik, Humboldt Universität zu Berlin, Invalidenstrasse 110, D-10115 Berlin, Germany

HP. Winter and F. Aumayr*
Institut für Allgemeine Physik, Technische Universität Wien, Wiedner Hauptstrasse 8-10, A-1040 Vienna, Austria

Received 30 May 2000; published 17 October 2000

Electron emission from H0 projectiles (1–20 keV) grazingly scattered off a LiF(001) single-crystal surface has been studied for impact angles from 0.5° to 1.8°. We observe that the threshold energy for electron emission increases with smaller projectile impact angle, whereas at higher impact energies smaller angles are more efficient for producing electrons. Our data are analyzed in terms of position- and velocity-dependent electron production rates that indicate that an electron promotion mechanism is responsible for electron emission.

© 2000 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevA.62.052901
DOI:
10.1103/PhysRevA.62.052901
PACS:
79.20.Rf, 61.85.+p, 79.60.Bm

*Author to whom correspondence should be addressed. Electronic address: aumayr@iap.tuwien.ac.at

 
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