Diffraction and holography of photoelectrons and fluorescent x-rays

Conference · Thu Apr 01 04:00:00 EST 1993

OSTI ID:10180564

Fadley, C S ^[1]

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1. Lawrence Berkeley Lab., CA (United States)

Photoelectron diffraction is by now a powerful technique for studying surface structures, with special capabilities for resolving chemical and magnetic states of atoms and deriving direct structural information from both forward scattering and backscattering. Fitting experiment to theory can lead to structural accuracies in the 0.03 {Angstrom} range. Holographic inversions of such diffraction data also show considerable promise for deriving local three-dimensional structures around a given emitter with accuracies of 0.2--0.3 {Angstrom}. Resolving the photoelectron spin in some way and using circularly polarized radiation for excitation provide added dimensions for the study of magnetic systems and chiral experimental geometries. Synchrotron radiation with the highest brightness and energy resolution, as well as variable polarization, is crucial to the full exploitation of these techniques. X-ray fluorescence holography also has promise for structural studies, but will require intense excitation sources and multichannel detection to be feasible.

• Research Organization: Lawrence Berkeley Lab., CA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States); Department of Defense, Washington, DC (United States)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 10180564
• Report Number(s): LBL--34374; CONF-930405--36; ON: DE93019240; CNN: Contract N00014-90-J-1457
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400101
665100
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ACTIVATION, NUCLEAR REACTION, RADIOMETRIC, AND RADIOCHEMICAL PROCEDURES
ELECTRON DIFFRACTION
FOURIER TRANSFORMATION
HOLOGRAPHY
MAGNETIC CIRCULAR DICHROISM
NUCLEAR TECHNIQUES IN CONDENSED MATTER PHYSICS
PHOTOELECTRON SPECTROSCOPY
SPIN
STRUCTURAL CHEMICAL ANALYSIS
SURFACES
SYNCHROTRON RADIATION
X-RAY FLUORESCENCE ANALYSIS