6.3.1.2.1 Scattering phenomena

Chapter Concepts

Properties	LEED; RHEED; crystal structure; electron scattering data; ion scattering data; lattice parameter; surface determination; surface structure
Keywords	interaction; introduction; surface
Substrates	atom; charged particle

Source

Title	6.3.1.2.1 Scattering phenomena
In	6.3.1.2 Low energy ion scattering
Author	P. Alkemade
Part of	Landolt-Börnstein - Group III Condensed Matter
	Numerical Data and Functional Relationships in Science and Technology
Volume	24c: Interaction of Charged Particles and Atoms with Surfaces
Edited by	G. Chiarotti
Chapter-DOI	10.1007/10086066_40
Book-DOI	10.1007/b87125 (Volume in Bookshelf)

Cite as

RIS-Export	Alkemade, P.: 6.3.1.2.1 Scattering phenomena. Chiarotti, G. (ed.). SpringerMaterials - The Landolt-Börnstein Database (http://www.springermaterials.com). DOI: 10.1007/10086066_40

Abstract

	6.3.1.2.1 Scattering phenomena in '6.3.1.2 Low energy ion scattering', part of 'Landolt-Börnstein - Group III Condensed Matter: Numerical Data and Functional Relationships in Science and Technology, Volume 24c: Interaction of Charged Particles and Atoms with Surfaces'.
	This chapter discusses low energy ion scattering (LEIS) phenomena of ions. In the simplest LEIS experiment ions are reflected in a single (or binary) collision from one surface atom. It has been shown experimentally that the concept of the binary collision is valid for Ne ions with energies as low as 20 eV. The screening function describes the reduction of the pure internuclear (Coulomb) force by the electrons of the projectile and the target atom. Several approximation models for the screening function (viz., interaction potential) have been suggested. Scattering from two surface atoms (viz., double scattering) is the next simplest scattering mechanism. In case of double scattering not all reflection angles are possible and that for each possible reflection angle there are two distinct scattering mechanisms: one corresponding to quasi-single and the other to quasi-double scattering. The energy of the doubly scattered ions is generally larger than that of the singly scattered ions. More complicated scattering mechanisms are triple, zig-zag and chain scattering.

6.3.1.2.1 Scattering phenomena in '6.3.1.2 Low energy ion scattering', part of 'Landolt-Börnstein - Group III Condensed Matter: Numerical Data and Functional Relationships in Science and Technology, Volume 24c: Interaction of Charged Particles and Atoms with Surfaces'.

This chapter discusses low energy ion scattering (LEIS) phenomena of ions. In the simplest LEIS experiment ions are reflected in a single (or binary) collision from one surface atom. It has been shown experimentally that the concept of the binary collision is valid for Ne ions with energies as low as 20 eV. The screening function describes the reduction of the pure internuclear (Coulomb) force by the electrons of the projectile and the target atom. Several approximation models for the screening function (viz., interaction potential) have been suggested. Scattering from two surface atoms (viz., double scattering) is the next simplest scattering mechanism. In case of double scattering not all reflection angles are possible and that for each possible reflection angle there are two distinct scattering mechanisms: one corresponding to quasi-single and the other to quasi-double scattering. The energy of the doubly scattered ions is generally larger than that of the singly scattered ions. More complicated scattering mechanisms are triple, zig-zag and chain scattering.

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