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发表于 2025-3-26 23:19:06
Interaction Potentials, an ordered surface directly gives the reciprocal lattice vectors . of the surface; the broadening of the diffraction peaks indicates the type and amount of disorder; dips or peaks in the intensity of a diffracted beam as a function of the incidence angles (.., ..), or of the incident energy .., giv
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发表于 2025-3-27 02:48:19
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armistice
发表于 2025-3-27 08:32:21
Investigation of Surface Imperfections by Diffuse Scattering of He Atoms,ecrease in intensity of a He atom beam caused by the target molecules allows the determination of the integral cross-section of a molecule, which is related to its total size. Since in a typical molecular beam experiment the de Broglie wavelength of the He atoms is of the order of the diameter of th
美食家
发表于 2025-3-27 12:20:27
Scattering from Stepped Surfaces and Roughening,the major applications of helium diffraction in surface structure analysis. Steps are almost always present on surfaces as a consequence of either an imperfect preparation or thermal equilibrium. Thus the characterization of residual steps on a sample is a necessary operation prior to any serious su
战役
发表于 2025-3-27 16:24:04
Resonances in Helium Scattering from Surfaces,tion, studies of gas—solid interactions developed as an important branch of surface physics. Measured in the very first atomic scattering and diffraction experiments and correctly recognized and interpreted from the very beginning, selective . now represent a special highlight in atom-surface scatte
旧式步枪
发表于 2025-3-27 18:00:00
Theoretical Aspects of Atom-Surface Scattering,surfaces . In some cases the necessary theory is very simple, as for example in identifying surface structures from the positions of diffraction peaks, or obtaining surface phonon dispersion relations from the positions of the phonon peaks in an inelastic experiment. In most other cases, howeve
Ligneous
发表于 2025-3-28 00:03:10
Surface Phonons: From Theory to Spectroscopy and Back,urface elastic waves is commonly considered the starting point of surface physics. The theory of Rayleigh waves and other types of surface waves in semiinfinite elastic continua very soon left the realm of geophysics and attracted the interest of solid state physicists and materials scientists due t
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发表于 2025-3-28 03:59:05
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发表于 2025-3-28 08:45:49
Phonon Inelastic Scattering,density of states. At the surface the conditions of motion for the atoms are changed with respect to the bulk. The symmetry is reduced at the surface and the forces acting on the atoms are changed compared to the bulk. Due to these differences phonons localized at the surface (surface phonons) may e
迷住
发表于 2025-3-28 11:07:21
Quasielastic Helium Scattering Studies of Adatom Diffusion on Surfaces, decades He-atom scattering has matured into a powerful tool in the study of surfaces. Crucial contributions to both the development of the instrumentation for He-atom scattering and the exploration and interpretation of an extensive variety of surface phenomena which are accessible with this techni