Characterization of atomic defects and their aggregates using positron annihilation spectroscopy

Conference · Thu Nov 01 04:00:00 EST 1984

OSTI ID:6189885

Siegel, R W; Fluss, M J; Smedskjaer, L C

Positrons localize in trapped states at a variety of defects sites in solids, from which they subsequently annihilate with unique observable characteristics. As such, the positron is a valuable probe for the study of these defects. Positron annihilation spectroscopy (PAS) has made significant contributions in recent years to the determination of atomic defect properties in metals and alloys, and in molecular solids as well. It has also been used extensively in the monitoring and characterization of vacancy-like microstructure development, as occurs during post-irradiation annealing. The characterization of defects using PAS is selectively reviewed and some possibilities for using the positron as a localized probe of the atomic and electronic structure of atomic defects and their aggregates are discussed. 32 references, 4 figures.

• Research Organization: Argonne National Lab., IL (USA)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6189885
• Report Number(s): CONF-841157-65; ON: DE85006206
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
645100 -- High Energy Physics-- Particle Interactions & Properties-Experimental
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ALLOYS
ANNIHILATION
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
BASIC INTERACTIONS
DATA ANALYSIS
DEFECTS
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
ELEMENTS
FERMIONS
GAMMA SPECTROSCOPY
INTERACTIONS
LEPTONS
METALS
POSITRONS
SPECTROSCOPY
TRAPPING