Elastic and rotationally inelastic diffraction of hydrogen molecular beams from the (001) face of LiF at 80°K

Boato, G.; Cantini, P.; Mattera, L.

doi:10.1063/1.433134

Cited by 97 publications

(36 citation statements)

References 22 publications

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“…8 The sharp features in the N 2 data are quickly smeared out when the target temperature is increased, just as we observed for Ar and Kr. We notice in this context that rotationally inelastic diffraction is a well-established phenomenon in scattering of hydrogen molecules 25 and we discuss such scattering for N 2 and other molecules (D 2 , O 2 , and CH 4 ) in detail elsewhere. 8 Diffraction peaks are weak relative to the specular peak in the angular scans shown in Figs.…”

Section: A Experimentsmentioning

confidence: 96%

Probing a cold surface with slow heavy-atom scattering: Experimental results and theoretical calculations

et al. 2002

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Slow heavy atoms scattering from cold surfaces excite many phonons, but still have a finite elastic scattering fraction. We have measured the coherent elastic intensity of low-energy Ne, Ar, and Kr beams scattered from a Cu͑111͒ surface, and compared the results to accurate semiclassical calculations. Earlier experiments have been extended to a range of incident beam energies, while earlier calculations have been improved by using state-of-the-art atom-surface potentials and surface phonon densities of states. All inputs to the calculations are taken from the literature, so they involve no adjustable parameters. We compare both the zero-temperature limit and the thermal attenuation of the elastic scattering at elevated temperatures. Our comparisons confirm that the probability for elastic scattering is ͑i͒ independent of particle mass m at low surface temperatures and ͑ii͒ depends on ͱm at elevated temperatures. Corresponding experimental observations for the comparatively light particles H 2 , D 2 , and He show clear deviations from the semiclassical predictions. Our analysis shows that this regime provides new and complementary information about both surface phonons and atom-surface potentials.

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Section: A Experimentsmentioning

confidence: 96%

Probing a cold surface with slow heavy-atom scattering: Experimental results and theoretical calculations

et al. 2002

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“…Therefore, it is regarded as a thermal mechanism. Many research groups have given evidence that non-thermal processes are also important to understand the catalytic reactions [13][14][15][16][17][18]. The transient nonthermal mobility caused by the inability to instantaneously dissipate the energy gained by a particle after the formation of surface bond seems to be a common process in nature.…”

Section: Introductionmentioning

confidence: 99%

The effect of inactive impurities on a surface in NO–CO reaction: A Monte Carlo simulation

Ahmad

Baloch

2007

Applied Surface Science

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“…Then, H 2 was extensively used in scattering experiments on metal 6,7 and dielectrics, 8,9 as a probe of the surface state. This emphasis stimulated theoretical studies related to the determination of accurate potential expressions for the H 2 -surface system and to the adequate description of the molecule dynamics based on quantum mechanics principles.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of ortho and para H2 on NaCl(001)

Briquez

Picaud

Giŗardet

et al. 1998

The Journal of Chemical Physics

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Fourier transform infrared spectroscopy (FTIR) experiments together with interaction potential calculations are performed to interpret the adsorption–desorption properties of para and ortho H2 molecules physisorbed on the (001) faces of NaCl crystallites. Isotherms of the adsorption process show preferential adsorption of para-H2 from gaseous normal-H2 at surface temperature around 10 K. Isobars of the desorption process show preferential desorption of para-H2 from a mixed ortho-H2 and para-H2 adsorbate. A quantum description of the molecular motions corroborates preferential adsorption of p- and (M=±1) o-H2 on the cation sites, as proposed in previous classical studies. It is shown that the adsorption energy is smaller for the para than for the (M=±1) ortho species in agreement with experimental measurement of desorption energy, while (M=0) o-H2 is only slightly bound to the substrate. This indicates that the ionic surface can discriminate all the H2 species. The determination of the bar spectrum for a set of independently adsorbed H2 species can interpret most of the infrared signals assigned to adsorption on the terrace sites. More specially the experimental behavior, with temperature and coverage, of the frequencies and relative intensities of the pure vibrational peaks and of the translation–vibration combination bands is very well explained in terms of hindered external motions of the admolecule.

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Elastic and rotationally inelastic diffraction of hydrogen molecular beams from the (001) face of LiF at 80°K

Cited by 97 publications

References 22 publications

Probing a cold surface with slow heavy-atom scattering: Experimental results and theoretical calculations

Probing a cold surface with slow heavy-atom scattering: Experimental results and theoretical calculations

The effect of inactive impurities on a surface in NO–CO reaction: A Monte Carlo simulation

Adsorption of ortho and para H2 on NaCl(001)

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