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Surface structure determination of the cleavage faces of CdSe via low-energy positron diffraction

Conference ·
OSTI ID:6676781
; ; ; ; ; ; ;
Low energy positron diffraction intensities were measured for positron beams from CdSe(1010) and fourteen beams for CdSe(1120). These were compared with calculated intensities for bond-length- conserving relaxed surface structures for both surfaces. Using an R-factor methodology the best-fit structures were obtained for these surfaces corresponding to local planar tilt angles of ..omega.. = 15 +-5/degree/ for CdSe(1010) and ..omega.. = 27 +-7/degree/ for CdSe(1120). Both results are in excellent correspondence withe predicted structures based on tight-binding total-energy minimization calculations. 21 refs., 5 figs., 2 tabs.
Research Organization:
Pacific Northwest Lab., Richland, WA (USA)
DOE Contract Number:
AC06-76RL01830
OSTI ID:
6676781
Report Number(s):
PNL-SA-15997; CONF-881002-19; ON: DE89001993
Country of Publication:
United States
Language:
English

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Related Subjects

656003* -- Condensed Matter Physics-- Interactions between Beams & Condensed Matter-- (1987-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BEAMS
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CADMIUM COMPOUNDS
CADMIUM SELENIDES
CALCULATION METHODS
CHALCOGENIDES
COBALT 58
COBALT ISOTOPES
COHERENT SCATTERING
CRYSTAL STRUCTURE
DAYS LIVING RADIOISOTOPES
DIFFRACTION
ELECTRON CAPTURE RADIOISOTOPES
ELECTRON DIFFRACTION
HOURS LIVING RADIOISOTOPES
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
LEPTON BEAMS
NUCLEI
ODD-ODD NUCLEI
PARTICLE BEAMS
POSITRON BEAMS
RADIOISOTOPES
SCATTERING
SELENIDES
SELENIUM COMPOUNDS
SURFACE PROPERTIES