Accession Number : ADA187643

Title :   Charge Exchange in Low Energy (keV) and Hyperthermal Energy (10-100eV) Ion Scattering.

Descriptive Note : Final rept. 1 Apr 86-15 Nov 87,

Corporate Author : CORNELL UNIV ITHACA NY LAB OF ATOMIC AND SOLID STATE PHYSICS

Personal Author(s) : Cooper, Barbara H

PDF Url : ADA187643

Report Date : 10 Dec 1987

Pagination or Media Count : 14

Abstract : The overall research program described in this report is to investigate the interaction of low (keV) and hyperthermal (10-100 eV) ions with clean and adsorbate-covered metal surfaces; in particular, ion-surface charge exchange processes. We report on the operation of the UHV scattering apparatus for the ion scattering measurements, ongoing development and upgrade of the apparatus, the use of two ion scattering simulations which together cover the entire energy range of interest, the further development of these simulations, and most importantly, the ongoing experiments to determine charge transfer probabilities. The data we present in this report are representative of the scattering spectra we measure. Completed analysis of these and similar spectra will be presented in forthcoming papers. To date, we have measured spectra for Li+, Na+, K+, He+, Ne+, and Ar+ beams, ranging in energy from 50 eV to 4 keV, scattered from the 001 and 1-10 azimuths of Cu(110). Important features of these spectra have been identified with the scattering simulations. Keywords: Hyperthermal ion beams, Resonant charge exchange, Scattering dynamics, Ion scattering instrumentation.

Descriptors :   *CHARGE TRANSFER, *ION EXCHANGE, *EXCHANGE REACTIONS, *ULTRAVIOLET RADIATION, DYNAMICS, ENERGY, HIGH TEMPERATURE, INSTRUMENTATION, ION BEAMS, IONS, LOW ENERGY, MEASUREMENT, METALS, PROBABILITY, RESONANCE, SCATTERING, SIMULATION, SPECTRA, SURFACES, ADSORBATES, LITHIUM, SODIUM, POTASSIUM, HELIUM, NEON, ARGON, COPPER, CRYSTAL STRUCTURE, ELECTROSTATIC ANALYZERS

Subject Categories : Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE