Atom-surface scattering theory

Bortolani, V.; Levi, A.C.

doi:10.1007/bf02724478

Cited by 101 publications

(58 citation statements)

References 130 publications

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“…This phase is stable in time as demonstrated by the fact that diffraction intensities do not show deviations from the Debye-Waller law [6], provided that the surface temperature remains lower than 235 K. At higher temperatures the diffraction patterns typical of the 0(2• 1)-Ag(110) phase are obtained: OH groups recombine forming H20 which desorbs from the surface and the remaining oxygen atoms restore the initial phase.…”

Section: -Experimental Apparatusmentioning

confidence: 94%

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He diffraction study of the OH(1×1)−Ag(110) phase

Canepa¹,

Cantini²,

Vetere³

et al. 1993

Il Nuovo Cimento D

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Summary. --The OH(1 x 1)-Ag(ll0) phase obtained after H20 dissociation on the 0(2• 1)-A~(ll0) surface is investigated. Structural and electronic properties are studied by He diffractive scattering and angularly resolved ultraviolet photoemission spectroscopy (ARUPS). Diffractive data are interpreted in terms of the hard corrugated wall (HCW) potential leading to the determination of the corrugation function ~(R). The shape of ~(R) indicates that the phase under study is formed of OH rows along (110) where hydroxil groups interact strongly. The interaction between rows instead is weak and essentially repulsive.

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Section: -Experimental Apparatusmentioning

confidence: 94%

“…The reduction of the intensity of the G-th diffraction peak with Ts can be interpreted in terms of the Debye-Waller (DW) attenuation law [6] intensity from an hypothetical static surface and the DW factor can be approximated as [6] (4) 1, 2~A,. 2 W(G, T~) = ~ ~uz ~ aa~.…”

Section: -Experimental Apparatusmentioning

confidence: 99%

He diffraction study of the OH(1×1)−Ag(110) phase

Canepa¹,

Cantini²,

Vetere³

et al. 1993

Il Nuovo Cimento D

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“…[8][9][10]. In most of those investigations, however, clean crystalline surfaces that are smooth at the atomic level and that have been kept clean under ultra-high vacuum conditions have been used.…”

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confidence: 99%

Coherent Reflection of He Atom Beams from Rough Surfaces at Grazing Incidence

et al. 2010

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We report coherent reflection of thermal He atom beams from various microscopically rough surfaces at grazing incidence. For a sufficiently small normal component kz of the incident wavevector of the atom the reflection probability is found to be a function of k z only. This behavior is explained by quantum-reflection at the attractive branch of the Casimir-van der Waals interaction potential. For larger values of kz the overall reflection probability decreases rapidly and is found to also depend on the parallel component kx of the wave-vector. The material specific kx dependence for this classic reflection at the repulsive branch of the potential is discussed in terms of an averagingout of the surface roughness under grazing incidence conditions. atom beams of thermal energies. In these experimental studies classic reflection at the repulsive branch of the potential was considered to be negligible, either because of deexcitation of the metastable atoms [3,4], inelastic scattering or adsorption [5], or surface roughness [6]. Quantum reflection was also theoretically studied, using the long-range Casimir-van der Waals atom-surface potential, indicating that the reflection probability is only a function of k z , the component of the incident wave-vector that is perpendicular to the surface [2].

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“…At this same level of approximation, it is assumed that the elastic part of the interaction potential commutes with the inelastic part, and the transition rate is then expressed as [44,45] …”

Section: Theorymentioning

confidence: 99%

Molecule scattering from insulator and metal surfaces

Moroz

Ambaye

Manson

2004

J. Phys.: Condens. Matter

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Calculations are carried out and compared with data for the scattering of CH 4 molecules from a LiF(001) surface and for O 2 scattering from Al(111). The theory is a mixed classical-quantum formalism that includes energy and momentum transfers between the surface and projectile for translational and rotational motions as well as internal mode excitation of the projectile molecule. The translational and rotational degrees of freedom couple most strongly to multiphonon excitations of the surface and are treated with classical dynamics. Internal vibrational excitations of the molecules are treated with a semiclassical formalism with extension to arbitrary numbers of modes and arbitrary quantum numbers. Calculations show good agreement for the dependence on incident translational energy, incident beam angle and surface temperature when compared with data for energy-resolved intensity spectra and angular distributions.

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Atom-surface scattering theory

Cited by 101 publications

References 130 publications

He diffraction study of the OH(1×1)−Ag(110) phase

He diffraction study of the OH(1×1)−Ag(110) phase

Coherent Reflection of He Atom Beams from Rough Surfaces at Grazing Incidence

Molecule scattering from insulator and metal surfaces

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