Download or read book Helium Atom Scattering Studies of Gas surface Energy Transfer and Overlayer Dynamics on a Stepped Nickel Surface written by Daniel J. Gaspar and published by . This book was released on 1998 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Helium Scattering Studies of the Surface Structure and Dynamics of Rare Gas Crystals written by K. D. Gibson and published by . This book was released on 1985 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report reviews experiments involving He scattering from the surfaces of ordered rare gas overlayers physisorbed on Ag(111). The series of rare gases studied were Ar, Kr, and Xe. The measurements were performed on thin film structures which were grown on a layer-by-layer basis, from monolayer to thick film, in order to study how the surface properties changed with increasing distance from the substrate. Three types of experiments are discussed; elastic diffraction, selective adsorption, and inelastic single phonon scattering by angle-resolved time-of-flight. These experiments, taken together, provide a broad overview of the static and dynamic surface properties of rare gas overlayers. They also provide information about the forces which govern the adatom-adatom and adatom-substrate interactions. Originator supplied keywords include: Surface phonon dispersion relations; Helium diffraction; Selective adsorption; Rare gas interaction potentials; Thin film dynamics; Gas-surface energy exchange; Wetting.

Download or read book Helium Atom Scattering from Surfaces written by E. Hulpke and published by Springer Science & Business Media. This book was released on 2013-03-14 with total page 331 pages. Available in PDF, EPUB and Kindle. Book excerpt: High resolution helium atom scattering can be applied to study a number of interesting properties of solid surfaces with great sensitivity and accuracy. This book treats in detail experimental and theoretical aspects ofthis method as well as all current applications in surface science. The individual chapters - all written by experts in the field - are devoted to the investigation of surface structure, defect shapes and concentrations, the interaction potential, collective and localized surface vibrations at low energies, phase transitions and surface diffusion. Over the past decade helium atom scattering has gained widespread recognitionwithin the surface science community. Points in its favour are comprehensiveunderstanding of the scattering theory and the availability of well-tested approximation to the rigorous theory. This book will be invaluable to surface scientists wishing to make an informed judgement on the actual and potential capabilities of this technique and its results.

Download or read book Helium Atom Scattering from Surfaces written by E. Hulpke and published by Springer. This book was released on 1992-06-11 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: High resolution helium atom scattering can be applied to study a number of interesting properties of solid surfaces with great sensitivity and accuracy. This book treats in detail experimental and theoretical aspects ofthis method as well as all current applications in surface science. The individual chapters - all written by experts in the field - are devoted to the investigation of surface structure, defect shapes and concentrations, the interaction potential, collective and localized surface vibrations at low energies, phase transitions and surface diffusion. Over the past decade helium atom scattering has gained widespread recognitionwithin the surface science community. Points in its favour are comprehensiveunderstanding of the scattering theory and the availability of well-tested approximation to the rigorous theory. This book will be invaluable to surface scientists wishing to make an informed judgement on the actual and potential capabilities of this technique and its results.

Download or read book Investigations of the Dynamics and Growth of Insulator Films by High Resolution Helium Atom Scattering Final Report May 1 1985 April 30 1997 written by and published by . This book was released on 1997 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the twelve years of this grant from the U.S. Department of Energy, DE-FG05-85ER45208, the over-reaching aims of this work have been to explore and to attempt to understand the fundamental physics and chemistry of surfaces and interfaces. The instrument we have employed m in this work is high-resolution helium atom scattering (HAS) which we have become even more convinced is an exceptionally powerful and useful tool for surface science. One can follow the evolution of the development and progress of the experiments that we have carried out by the evolution of the proposal titles for each of the four three-year periods. At first, m in 1985-1988, the main objective of this grant was to construct the HAS instrument so that we could begin work on the surface vibrational dynamics of crystalline materials; the title was {open_quotes}Helium Atom-Surface Scattering Apparatus for Studies of Crystalline Surface Dynamics{close_quotes}. Then, as we became more interested m in the growth of films and interfaces the title m in 1988-1991 became {open_quotes}Helium Atom Surface Spectroscopy: Surface Lattice Dynamics of Insulators, Metal and Metal Overlayers{close_quotes}. In 1991-1994, we headed even more m in this direction, and also recognized that we should focus more on insulator materials as very few techniques other than helium atom scattering could be applied to insulators without causing surface damage. Thus, the proposal title became {open_quotes}Helium Atom-Surface Scattering: Surface Dynamics of Insulators, Overlayers and Crystal Growth{close_quotes}. M in the final period of this grant the title ended up {open_quotes}Investigations of the Dynamics and Growth of Insulator Films by High Resolution Helium Atom Scattering{close_quotes} m in 1994-1997. The list of accomplishments briefly discussed in this report are: tests of the shell model; multiphoton scattering; physisorbed monolayer films; other surface phase transitions; and surface magnetic effects.

Download or read book Dissertation Abstracts International written by and published by . This book was released on 2004 with total page 854 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Study of Surface Dynamics Using Helium Atom Scattering written by Om Prakash Narasimhan and published by . This book was released on 1990 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Chemical Abstracts written by and published by . This book was released on 2002 with total page 2364 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Helium Scattering Studies of the Surface Structure and Dynamics of Rare Gas Crystals written by Kevin Drew Gibson and published by . This book was released on 1988 with total page 720 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book American Doctoral Dissertations written by and published by . This book was released on 1998 with total page 784 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Multiphonon Scattering of Helium Atoms from Metal Surfaces written by Daniel Eric Himes and published by . This book was released on 1992 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Helium Atom Scattering from Isolated Adsorbates and Ordered Adsorbate Layers written by Gregory Stuart Elliott and published by . This book was released on 1988 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Helium Atom Scattering Studies of the Cu3Au 001 Surface written by Suzanne Ferree King and published by . This book was released on 1993 with total page 610 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Helium Atom Scattering Investigations of Surface Structure Evolution and Vibrational Dynamics During Deposition of Phosphine and Tin on Cu 001 Surfaces written by Lyudmila Goncharova and published by . This book was released on 2003 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Helium Atom Scattering Study of the Surface Structure and Dynamics of KCl 001 and Potassium Tantalate KTaO3 Doped with Lithium and Niobium written by Rifat Fatema and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: The structure and dynamics of the (001) surface of potassium tantalate (KTaO3), doped with lithium (KTL) and niobium (KTN) have been investigated using high resolution helium atom diffraction and single-phonon creation and annihilation, inelastic scattering experiments. This work is the first to investigate the surface structure and dynamics of KTL samples. These experiments are an extension of earlier work done with pure KTaO3 and KTN crystals. As in the previous experiments broad half-order diffraction peaks were observed in the 100 azimuth, which may be related to the formation of polar nanoregions that have been reported for bulk KTaO3. However, the condition for the formation of these regions differ somewhat from those reported previously. Drift spectra for these samples, which reveal the step-height distribution of terraces at the surface, show the expected oscillatory behavior for lightly doped KTaO3. Significantly, they also confirm the unusual behavior reported in earlier experiments for the 30% KTN samples. Surface dispersion curves in the two high symmetry directions, namely, 100 and 110, have been obtained for both KTL and KTN samples. This work compares the above phenomena observed in KTL and KTN to similar phenomena previously observed in pure KTaO3 and KTN. Surface dynamics of KCl(001) is also investigated in this work and compared with reported model calculations. The agreement is generally good for the low-energy Rayleigh mode and for a crossing mode. However, a high energy dispersionless mode, found in the 100 high symmetry direction lies in the region of a shear-horizontal Lucas mode, that cannot in theory be observed by helium atom scattering in our experimental configuration. This disagreement between theory and experiment suggests that further theoretical work is necessary to understand the dynamics of simple ionic-insulator systems like KCl.

Download or read book Helium Atom Scattering as a Probe of Surface Phonons written by Steven Charles Yerkes and published by . This book was released on 1981 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Investigations of the Dynamics and Growth of Surfaces and Ultra Thin Films by Helium Atom Scattering written by and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: