Published October 1984 | Version v1
Journal article Metadata-only

Vacancy formation energy in thorium by positron annihilation

Creators

  • 1. Atomic Energy of Canada Ltd., Chalk River, Ontario. Chalk River Nuclear Labs.
  • 2. Ames Lab., IA (USA)

Description

The positron annihilation peak coincidence rate has been measured in thorium from 20 to 14600C. A gradual S-shaped rise due to positron trapping at vacancies has been observed above 7000C. The peak rate remained unchanged across the FCC to BCC transition at approx.= 13450C, which indicates that positron trapping at vacancies is saturated at this temperature. A trapping-model analysis of the data yields a vacancy formation energy in α(FCC)-thorium of (1.28 +- 0.23)eV. (author)

Additional details

Publishing Information

Journal Title
J. Phys., F (London). Met. Phys.
Journal Volume
14
Journal Issue
10
Series
J. Phys., F (London). Met. Phys.
Journal Page Range
2323-2328
ISSN
0305-4608

INIS

Country of Publication
United Kingdom
Country of Input or Organization
United Kingdom
INIS RN
16009590
Subject category
S36: MATERIALS SCIENCE; S74: ATOMIC AND MOLECULAR PHYSICS;
Descriptors DEI
ANGULAR CORRELATION; ANNIHILATION; FORMATION HEAT; HIGH TEMPERATURE; MEDIUM TEMPERATURE; PHYSICAL RADIATION EFFECTS; POSITRONS; THORIUM; TRAPPING; VACANCIES
Descriptors DEC
ACTINIDES; ANTILEPTONS; ANTIMATTER; ANTIPARTICLES; CORRELATIONS; CRYSTAL DEFECTS; CRYSTAL STRUCTURE; ELEMENTARY PARTICLES; ELEMENTS; ENTHALPY; FERMIONS; INTERACTIONS; LEPTONS; MATTER; METALS; PARTICLE INTERACTIONS; PHYSICAL PROPERTIES; POINT DEFECTS; RADIATION EFFECTS; REACTION HEAT; THERMODYNAMIC PROPERTIES