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Phys. Rev. Lett. 90, 013201 (2003) [4 pages]

Thermally Enhanced Neutralization in Hyperthermal Energy Ion Scattering

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C. E. Sosolik*, J. R. Hampton†, A. C. Lavery‡, and B. H. Cooper§
Laboratory of Atomic and Solid State Physics, Cornell University, Ithaca, New York 14853-2501

J. B. Marston
Department of Physics, Box 1843, Brown University, Providence, Rhode Island 02912

Received 11 July 2002; published 2 January 2003

Neutralization probabilities are presented for hyperthermal energy Na+ ions scattered from a Cu(001) crystal as a function of surface temperature and scattered velocity. A large enhancement in neutralization is observed as the temperature is increased. Velocity-dependent charge transfer regimes are probed by varying the incident energy, with the most prominent surface temperature effects occurring at the lowest energies. The data agree well with results obtained from a model based on the Newns-Anderson Hamiltonian, where the effects of both temperature and velocity are incorporated.

© 2003 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.90.013201
DOI:
10.1103/PhysRevLett.90.013201
PACS:
34.50.Dy, 34.70.+e, 79.20.Rf

*Corresponding author: sosolik@nist.gov

Present Address: National Institute of Standards and Technology, Gaithersburg, MD 20899-8412.

†Present Address: Dept. of Chemistry, Penn State University, University Park, PA 16802.

‡Present Address: Woods Hole Oceanographic Institution, Woods Hole, MA 02543.

§Deceased.

 
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