High-resolution low-energy electron reflection from W(100) using the electron energy-loss spectrometer: a step towards quantitative analysis of surface vibrational spectra
High-resolution low-energy electron-reflection measurements and electron energy-loss measurements for clean W(100) and for the hydrogen-saturated phase (B/sub 1/) on W(100) are reported. The ability to perform both low-energy reflectance, low-energy electron diffraction, and high-resolution electron energy-loss experiments on the same crystal using the same electron optics permits several novel experiments. For example, it is possible to quantitatively test the dipole scattering mechanism and examine dipole and impact loss cross sections under precisely defined scattering conditions (i.e., under diffracted beam emergence conditions or at energies corresponding to reflectance resonance conditions). Under certain scattering conditions, the dipole scattering selection rule is shown to break down. Suitable modifications of the electron-optics-control electronics also permit direct measurements of the cross-section energy dependence of vibrational losses. These new features represent an important step towards quantitative applications of vibrational spectroscopy based on comparing electron energy-loss spectroscopy signals from chemisorbed species on different crystal surfaces.
- Research Organization:
- Texas Univ., Austin (USA). Dept. of Physics
- OSTI ID:
- 6794592
- Report Number(s):
- AD-A-195205/0/XAB
- Resource Relation:
- Other Information: Pub. in Jnl. of Vacuum Science and Technology A, Vol. 5, No. 4, 435-439(Jul-Aug 1987)
- Country of Publication:
- United States
- Language:
- English
Similar Records
High-resolution low-energy electron reflection from W(100) using the electron energy-loss spectrometer: A step towards quantitative analysis of surface vibrational spectra
Chemisorbed pyridine on Ni(001): A high resolution electron energy loss study of vibrational and electronic excitations
Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
SURFACES
ENERGY-LOSS SPECTROSCOPY
TUNGSTEN
CONTROL
CROSS SECTIONS
CRYSTALS
DIFFRACTION
DIPOLES
ELECTRON DIFFRACTION
ELECTRON SPECTROSCOPY
ELECTRONS
HYDROGEN
LOSSES
REFLECTION
RESONANCE
SATURATION
SCATTERING
SIGNALS
COHERENT SCATTERING
ELEMENTARY PARTICLES
ELEMENTS
FERMIONS
LEPTONS
METALS
MULTIPOLES
NONMETALS
SPECTROSCOPY
TRANSITION ELEMENTS
656003* - Condensed Matter Physics- Interactions between Beams & Condensed Matter- (1987-)