Kinematics of hyperthermal energy ion scattering. [eV range 100-400]
Thesis/Dissertation
·
OSTI ID:6095439
In this thesis the author analyzes the kinematics of hyperthermal energy (<500 eV) alkali-ion scattering from clean and adsorbate-covered metal surfaces. After describing the equipment used to produce the hyperthermal energy beams, he presents a detailed analysis of energy and angular distributions of 100 to 400 eV Na{sup +} scattered from the clean Cu(110) surface. The spectra are analyzed using classical trajectory calculations. General features of the spectra can be reproduced using a model of the scattering with impact parameters restricted to lie along a chain of surface atoms. Full-surface simulations, including thermal vibrations of the surface atoms, give quantitative agreement with the data. Full-surface simulations are also used to examine the trajectories of ions scattered in-plane and their corresponding impact parameters. He has also analyzed changes in the scattered ion distributions induced by oxygen adsorption on the Cu(110) surface. Cu(110) exhibits a (2 x 1) reconstruction when exposed to oxygen. The changes in the scattering are twofold. First, ions with impact parameters over the second layer copper atoms have direct collisions with the oxygen adatoms, and lose a large fraction of their kinetic energy. Second, the range of final angles is significantly increased for ions with impact parameters over the top layer copper atoms. He has compared the measured scattered ion distributions to calculated spectra using the missing row and buckled row models of the reconstruction. The dependence of the scattered ion energies on the height of the oxygen adatom is also studied.
- Research Organization:
- Cornell Univ., Ithaca, NY (USA)
- OSTI ID:
- 6095439
- Country of Publication:
- United States
- Language:
- English
Similar Records
Trajectory analysis of low-energy and hyperthermal ions scattered from Cu(110)
Trajectory analysis of low-energy and hyperthermal ions scattered from Cu(110)
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
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Mon May 15 00:00:00 EDT 1989
·
OSTI ID:5462799
Trajectory analysis of low-energy and hyperthermal ions scattered from Cu(110)
Journal Article
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Mon May 15 00:00:00 EDT 1989
· Phys. Rev. B: Condens. Matter; (United States)
·
OSTI ID:6137002
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 00:00:00 EDT 1988
·
OSTI ID:6066559
Related Subjects
656003* -- Condensed Matter Physics-- Interactions between Beams & Condensed Matter-- (1987-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ADSORPTION
BEAMS
CATIONS
CHARGED PARTICLES
COLLISIONS
COMPARATIVE EVALUATIONS
COPPER
ELEMENTS
ENERGY
ENERGY LOSSES
ENERGY RANGE
EV RANGE
EV RANGE 100-1000
ION BEAMS
ION COLLISIONS
IONS
KINETIC ENERGY
LOSSES
METALS
NONMETALS
OXYGEN
PARTICLE KINEMATICS
POTASSIUM IONS
SCATTERING
SODIUM IONS
SORPTION
SPECTRA
SURFACES
TRANSITION ELEMENTS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ADSORPTION
BEAMS
CATIONS
CHARGED PARTICLES
COLLISIONS
COMPARATIVE EVALUATIONS
COPPER
ELEMENTS
ENERGY
ENERGY LOSSES
ENERGY RANGE
EV RANGE
EV RANGE 100-1000
ION BEAMS
ION COLLISIONS
IONS
KINETIC ENERGY
LOSSES
METALS
NONMETALS
OXYGEN
PARTICLE KINEMATICS
POTASSIUM IONS
SCATTERING
SODIUM IONS
SORPTION
SPECTRA
SURFACES
TRANSITION ELEMENTS