Trajectory analysis of low-energy and hyperthermal ions scattered from Cu(110)

Journal Article · Mon May 15 04:00:00 EDT 1989 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.39.10503· OSTI ID:6137002

McEachern, R L; Goodstein, D M; Cooper, B H

We have investigated the trajectories of Na/sup +/ ions scattered from the Cu(110) surface in the <1/bar 1/0> and <001> azimuths for a range of incident energies from 56 eV to 4 keV. Our goal is to explain the trends observed in the energy spectra and determine what types of trajectories contribute to these spectra. Using the computer program SAFARI, we have performed simulations with trajectory analyses for 100-, 200-, and 400-eV scattering. We show results from the 100-eV simulations in both azimuths and compare them with the experimental data. The simulated energy spectra are in excellent agreement with the data. Ion trajectories and impact parameter plots from the simulations are used to determine the relative importance of different types of ion--surface-atom collisions. The simulations have shown that the striking differences observed in comparing the <1/bar 1/0> and <001> spectra are mostly due to ions which scatter from second-layer atoms. This system exhibits strong focusing onto the second-layer atoms by the first-layer rows, and the focusing is very sensitive to the spacing between the rows. At the lower beam energies, scattering from the second layer dominates the measured spectra.

• Research Organization: Laboratory of Atomic and Solid State Physics, Clark Hall, Cornell University, Ithaca, New York 14853(US)
• OSTI ID: 6137002
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 39:15; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

656003* -- Condensed Matter Physics-- Interactions between Beams &amp; Condensed Matter-- (1987-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANGULAR DISTRIBUTION
CHARGED PARTICLES
COLLISIONS
COMPUTER CODES
COPPER
CRYSTALS
DISTRIBUTION
ELEMENTS
ENERGY RANGE
ENERGY SPECTRA
EV RANGE
EV RANGE 10-100
EV RANGE 100-1000
IMPACT PARAMETER
ION COLLISIONS
IONS
KEV RANGE
KEV RANGE 01-10
METALS
S CODES
SODIUM IONS
SPECTRA
TRAJECTORIES
TRANSITION ELEMENTS