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Positron annihilation studies on radiation damaged aluminum

Thesis/Dissertation ·
OSTI ID:6061902
In a metal, positrons are thermalized long before they annihilate. Defect sites like voids and bubbles trap these thermalized positrons. In addition, these defects cause changes in the electron wave functions. Thus annihilation gamma-ray photons can be used to study production and growth of voids and bubbles in metals. Angular correlation curves were recorded for unirradiated and irradiated aluminum samples and then compared with data on irradiated-annealed samples. The zero-angle coincidence count rates were also recorded during the isochronal anneals. The changes in the shapes of angular correlation curves and the zero-angle coincidence count rates were found to be related to the growth of bubbles.
Research Organization:
Wayne State Univ., Detroit, MI (USA)
OSTI ID:
6061902
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
360106* -- Metals & Alloys-- Radiation Effects
ALUMINIUM
ANNIHILATION
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
BASIC INTERACTIONS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
ELEMENTS
FERMIONS
INTERACTIONS
LEPTONS
MEASURING METHODS
METALS
PHYSICAL RADIATION EFFECTS
POSITRONS
RADIATION EFFECTS
VOIDS