DOI: 10.1063/1.444847. Direct inelastic scattering Ar from Pt(111)

Direct inelastic scattering Ar from Pt(111)

10.1063/1.444847

Crossref journal-article

AIP Publishing

The Journal of Chemical Physics (317)

Abstract

High resolution angularly resolved time of flight distributions are presented for a supersonic argon beam scattering from a clean well-characterized Pt(111) single crystal. A novel presentation of the resulting velocity and angular flux information in terms of iso-flux contour maps in Cartesian velocity space allows the scattering process to be decomposed into three mutually independent directions defined by the surface normal (z), parallel to the surface and in the scattering plane (y), and parallel to the surface but perpendicular to y and z(x). The iso-flux contour maps appear as nested ovals with principal axes oriented parallel to the above defined directions; axis length decreases in the order z, y, x. The corresponding variances in the x, y, and z velocities vary directly with the surface temperature. Three beam energy regimes are evident and are discussed in terms of the diminishing effect of the attractive well which occurs for increasing beam energies and the increasing effect of short range phenomena prevalent at high incident beam energies. Accomodation coefficients were defined and measured for the y and z directions and were 0.1 and 0.45, respectively, indicating the degree to which parallel and perpendicular momenta are not conserved in a single collision. Geometric scattering by instantaneous surface roughness is experimentally shown to be negligible for this system for beam energies &lt;20 000 K indicating that the scattering is by the finite momentum of the surface.

Bibliography

Hurst, J. E., Wharton, L., Janda, K. C., & Auerbach, D. J. (1983). Direct inelastic scattering Ar from Pt(111). The Journal of Chemical Physics, 78(3), 1559â1581.

Authors 4

J. E. Hurst (first)
Lennard Wharton (additional)
K. C. Janda (additional)
D. J. Auerbach (additional)

References 46 Referenced 143

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Dates

Type	When
Created	22 years, 6 months ago (Feb. 28, 2003, 11:47 a.m.)
Deposited	1 year, 6 months ago (Feb. 9, 2024, 7:43 p.m.)
Indexed	1 year, 6 months ago (Feb. 11, 2024, 4:43 a.m.)
Issued	42 years, 7 months ago (Feb. 1, 1983)
Published	42 years, 7 months ago (Feb. 1, 1983)
Published Print	42 years, 7 months ago (Feb. 1, 1983)

Funders 0

None

BibTeX

@article{Hurst_1983, title={Direct inelastic scattering Ar from Pt(111)}, volume={78}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.444847}, DOI={10.1063/1.444847}, number={3}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Hurst, J. E. and Wharton, Lennard and Janda, K. C. and Auerbach, D. J.}, year={1983}, month=feb, pages={1559–1581} }

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