Resonant charge-exchange studies with hyperthermal-energy ion beams: development of multi-detection capabilities and a data acquisition system. Final report, 15 November 1986-14 May 1988

Technical Report · Mon Aug 29 04:00:00 EDT 1988

OSTI ID:6066559

Cooper, B H

The overall research program described in this report is to investigate the interactions of hyperthermal (10-100 eV) and keV ions with clean and adsorbate-covered metal surfaces. Particular emphasis is placed on the study of ion-surface charge-exchange processes. Progress in instrumentation includes: completion of the general apparatus, the successful production of low phase-space alkali and noble-gas beams ranging in energy from about 10 eV to several keV, completion of two hemispherical analyzers for detecting scattered ions (one with high-resolution capabilities, the other for large angle scattering studies), design details of the position-sensitive pulse-counting detectors for multi-energy detection, and the configuration of a Macintosh II-based data-acquisition system. Scientific progress includes: measurements of 50-eV to 4-keV alkali scattering from clean and cesiated Cu(110), simulations using Hartree-Fock pair potentials that give good agreement with the 100- to 400-eV Na(+) scattering from Cu(110), trajectory analysis to identify peaks in the Na(+) energy spectra, measurements of charge-transfer probabilities for alkalis scattered from (Cu(110)) with low coverages (<1/10 monolayer) of Cs adsorbates, and ongoing development of a model that includes both local and collective effects of the Cs overlayers in determining charge transfer probabilities.

• Research Organization: Cornell Univ., Ithaca, NY (USA). Lab. of Atomic and Solid State Physics
• OSTI ID: 6066559
• Report Number(s): AD-A-201236/7/XAB
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular &amp; Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ALKALI METALS
BEAMS
CESIUM
CHARGED PARTICLES
COLLISIONS
COPPER
DATA ACQUISITION
DETECTION
DOCUMENT TYPES
ELECTROSTATICS
ELEMENTS
HARTREE-FOCK METHOD
ION BEAMS
ION COLLISIONS
ION EXCHANGE
IONS
METALS
PROBABILITY
PRODUCTION
PROGRESS REPORT
RESONANCE
SCATTERING
SODIUM IONS
SURFACES
TRAJECTORIES
TRANSITION ELEMENTS