Generalized Ramsauer-Townsend resonance in angle-resolved photoemission extended fine-structure oscillations
We observe a resonance in the scattering amplitude for S(1s) photoelectrons from Ni atoms and interpret this resonance as a dip in the Ni atom partial cross section for electron scattering related to the Ramsauer-Townsend effect. This generalized Ramsauer-Townsend effect occurs at a particular energy and angle rather than in the total elastic cross section. We show that the resonance energy is sensitive to curved-wave corrections and, after including multiple-scattering effects, we derive the S: Ni bond length in c(2 x 2)S/Ni(100) from the angle-resolved photoemission extended fine-structure oscillations arising from the scattering of S(1s) photoelectrons off of nearest-neighbor Ni atoms in the presence of the generalized Ramsauer-Townsend resonance. We find this bond length to be 2.20 +- 0.03 A corresponding to a S-Ni interplanar distance (d/sub perpendicular/) of 1.32 +- 0.04 A.
- Research Organization:
- Materials and Molecular Research Division, Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720 and Department of Chemistry, University of California, Berkeley, California 94720
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 6811054
- Journal Information:
- Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 35:3; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360104* -- Metals & Alloys-- Physical Properties
640301 -- Atomic
Molecular & Chemical Physics-- Beams & their Reactions
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALLOYS
AMPLITUDES
BOND LENGTHS
COLLISIONS
DATA
DIMENSIONS
ELECTRON COLLISIONS
ELECTRON SPECTROSCOPY
ENERGY RANGE
EV RANGE
EV RANGE 100-1000
EXPERIMENTAL DATA
FINE STRUCTURE
INFORMATION
LENGTH
MULTIPLE SCATTERING
NICKEL ALLOYS
NUMERICAL DATA
PHOTOELECTRON SPECTROSCOPY
RAMSAUER EFFECT
RESONANCE
SCATTERING
SCATTERING AMPLITUDES
SPECTROSCOPY
SULFUR COMPOUNDS