Positron Annihilation at Planar Defects in Oxides

Jan Kuriplach; O. Melikhova; Jakub Čížek; I. Procházka; G. Brauer; W. Anwand

doi:10.4028/www.scientific.net/MSF.733.240

Paper Titles

Positron Lifetime at Deep Donors of Radiation Origin in Proton - Irradiated FZ-Silicon Single Crystals
p.224

Hydrogen Interaction with Defects in ZnO
p.228

Hydrogen-Induced Defects of Subsurface Layer in ZnO Single Crystal Probed by a Slow Positron Beam
p.232

Effect of Sintering on Defects in Yttria Stabilised Zirconia
p.236

Positron Annihilation at Planar Defects in Oxides
p.240

Evidence of the Participation of Electronic Excited States in the Mechanism of Positronium Formation in Substitutional Tb_1-xEu_x(dpm)₃ Solid Solutions Studied by Optical and Positron Annihilation Spectroscopies
p.245

Inhibition of Positronium Formation in Yttria Stabilized Zirconia Nanopowders Modified by Addition of Chromia
p.249

Positron Annihilation Study of Neutron-Irradiated Nuclear Reactor Pressure Vessel Steels and their Model Alloy: Effect of Purity on the Post-Irradiation Annealing Behavior
p.257

Vacancy Type Defects in Oxide Dispersion Strengthened Steels
p.264

HomeMaterials Science ForumMaterials Science Forum Vol. 733Positron Annihilation at Planar Defects in Oxides

Positron Annihilation at Planar Defects in Oxides

Abstract:

Planar defects may exhibit free volumes which, in principle, are detectable using positron annihilation spectroscopy. In this contribution, we present a preliminary theoretical study of positron trapping at stacking faults in zinc oxide and at a grain boundary in zirconia. In particular, we calculate the positron lifetime and positron binding energy to such defects. In the case of the grain boundary in zirconia, the influence of the yttrium segregation on the GB structure and positron characteristics is also examined. Calculated structural and positron characteristics are critically compared with experimental and other calculated data.