Test of the interatomic potential in the eV-region by glancing-angle scattering of He-atoms from Fe(0 0 1)

Autor:	R. Pfandzelter, T. Igel, Konrad Gärtner, Daniel M. Danailov, Helmut Winter
Rok vydání:	2001
Předmět:	Range (particle radiation) Chemistry Scattering General Physics and Astronomy Interatomic potential Surfaces and Interfaces General Chemistry Condensed Matter Physics Spectral line Surfaces Coatings and Films Molecular dynamics Planar Atom Vertical displacement Atomic physics
Zdroj:	Applied Surface Science. 171:113-119
ISSN:	0169-4332
DOI:	10.1016/s0169-4332(00)00547-x
Popis:	We report on experimental observation of multimodal angular distributions of 15 keV He 0 -atoms scattered under glancing angles from an Fe(0 0 1) surface along a [0 0 0] surface direction. Based on classical molecular dynamics computer simulations of atom trajectories we deduce the He–Fe interaction potential in the eV-energy range. Our experiments visualize the transition from axial to planar surface channeling. For our dynamical row-model to describe the experimental data well, we construct a mixed potential from two well-known potentials in the literature, the “universal” potential for large distances and the “individual” potential for close particle separation. In addition, the shift of the experimental angle spectra with respect to the calculated shows elastic horizontal bend of the real atomistic rows due to the scattering and about 10 times smaller vertical displacement.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::9713a11603acca43dba6ddf7ba028c66 https://doi.org/10.1016/s0169-4332(00)00547-x Zobrazit plný text záznamu Full Text from ScienceDirect