Issue |
Europhys. Lett.
Volume 36, Number 1, October 1996
|
|
---|---|---|
Page(s) | 31 - 36 | |
Section | Atomic, molecular and optical physics | |
DOI | https://doi.org/10.1209/epl/i1996-00183-2 | |
Published online | 01 September 2002 |
Rotational corrugation in associative desorption of D2 from Cu(111)
1
Institut für Laser- und Plasmaphysik,
Universität Essen - 45117 Essen, Germany
2
Institut für Grenzflächenforschung und Vakuumphysik,
Forschungszentrum Jülich, 52428 Jülich, FRG.
Received:
1
July
1996
Accepted:
19
August
1996
We report rotationally state-resolved measurements of the average
steric orientation of molecules desorbing from a Cu(111)
surface. The desorbing flux of
molecules is probed by
laser-induced fluorescence with linearly polarized tunable vacuum
ultraviolet radiation in the
. Molecules desorbing
in the vibrational ground state show for all rotational states
measured
a quadrupole alignment factor,
,
compatible with a spatially isotropic distribution. A strong
azimuthal, polar, and lateral corrugation of the dissociative
interaction potential can cause this behavior.
PACS: 33.20.Ni – Vacuum ultraviolet spectra / 79.20.Rf – Atomic, molecular, and ion beam interactions with surfaces / 82.65.-i – Surface and interface chemistry
© EDP Sciences, 1996
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