Positron-annihilation spectroscopy of vacancy defects in aluminum

Conference · Tue Jun 01 04:00:00 EDT 1982

OSTI ID:6436595

Chakraborty, B; Berko, S; Fluss, M J; Hoffmann, K; Lippel, P; Siegel, R W

Positron-annihilation characteristics in a monovacancy and a divacancy in aluminium have been calculated self-consistently using a local density functional formalism, into which the many-body enhancement effects have been incorporated. Results for the theoretical two-dimensional angular correlation of annihilation radiation spectra are compared to experimental results obtained from an aluminum single crystal at 20/sup 0/C, where positrons annihilate from a Bloch-state, and at higher temperatures, 500/sup 0/C and 630/sup 0/C, where they annihilate primarily from vacancy-trapped states.

• Research Organization: Argonne National Lab., IL (USA); Brandeis Univ., Waltham, MA (USA). Dept. of Physics
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6436595
• Report Number(s): CONF-820274-2; ON: DE83007628
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
ALUMINIUM
ANGULAR CORRELATION
ANNIHILATION
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
BASIC INTERACTIONS
CORRELATIONS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
ELEMENTS
FERMIONS
INTERACTIONS
LEPTONS
METALS
POINT DEFECTS
POSITRONS
VACANCIES