Observation of Large Differences in the Diffraction of Normal- and Para- <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi>H</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></math></span> from LiF(001)

M. F. Bertino; A. L. Glebov; J. P. Toennies; F. Traeger; E. Pijper; G. J. Kroes; R. C. Mowrey

doi:10.1103/PhysRevLett.81.5608

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Observation of Large Differences in the Diffraction of Normal- and Para- $H_{2}$ from LiF(001)

M. F. Bertino, A. L. Glebov, J. P. Toennies, F. Traeger, E. Pijper, G. J. Kroes, and R. C. Mowrey

Phys. Rev. Lett. 81, 5608 – Published 21 December 1998

Abstract

Large differences have been observed in the diffraction intensities of normal-hydrogen and pure para-hydrogen scattered from the surface of a LiF(001) single crystal. The observed differences are shown to result from a strong coupling between the quadrupole moment of $H_{2}$ and the surface electrostatic field, which, in a zeroth order approximation, is averaged out in the case of para-hydrogen. Analogous effects are expected in scattering of all homonuclear diatomic molecules from ionic solids.

Received 16 September 1998

DOI:https://doi.org/10.1103/PhysRevLett.81.5608

Authors & Affiliations

M. F. Bertino^*, A. L. Glebov^†, J. P. Toennies, and F. Traeger

Max-Planck-Institut für Strömungsforschung, Bunsenstraße 10, 37073 Göttingen, Germany

E. Pijper and G. J. Kroes

Leiden Institute of Chemistry, Gorlaeus Laboratories, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands

R. C. Mowrey

Chemistry Division, Code 6179, Naval Research Laboratory, Washington, D.C. 20375-5342

^*Present address: Massachusetts Institute of Technology, Dept. of Chemistry, Room 2-115, 77 Mass. Avenue, Cambridge, MA 02139.
^†Present address: Bell Laboratories, Lucent Technologies, Murray Hill, NJ 07974.

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Vol. 81, Iss. 25 — 21 December 1998

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