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Direct observation of molecular hydrogen binding to magnesium oxide (100) surfaces

DOI: 10.1016/j.physb.2006.05.344 DOI Help

Authors: J. Z. Larese (Oak Ridge National Laboratory, USA.) , Lillian Frazier (Department of Chemistry, University of Tennessee, USA.) , Mark A, Adams (ISIS Facility, Rutherford Appleton Laboratory, U.K.) , Thomas Arnold , Robert J. Hinde (Department of Chemistry, University of Tennessee, USA.) , Anibal Ramirez-cuesta (ISIS Facility, Rutherford Appleton Laboratory, U.K.)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physica B: Condensed Matter , VOL 385-386 , PAGES 144 - 146

State: Published (Approved)
Published: November 2006

Abstract: Inelastic neutron scattering (INS) studies of the dynamical response of H2 films adsorbed on MgO (1 0 0) surface are compared to and correlated with structural information from neutron diffraction measurements of equivalent D2 films. At low coverage, a prominent peak, believed to be the para–ortho transition (usually observed at 14.7 meV in bulk H2 ) is observed at ∼11.2meV . For film thicknesses between 0.8 and ∼3 layers this peak becomes asymmetric with additional scattering on the high-energy transfer side of the peak. As molecules are added to the third layer we observe the concomitant growth of a peak at 14.7 meV.

Journal Keywords: Hydrogen; Adsorption isotherm; Neutron diffraction; Inelastic neutron scattering; Magnesium oxide

Subject Areas: Physics, Chemistry


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