Neutron irradiated copper: Is the main positron lifetime component due to stacking fault tetrahedra?

M. Eldrup, B. N. Singh, D. J. Edwards, Y. Nagai, H. Ohkubo, M. Hasegawa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Citations (Scopus)

Abstract

Copper has been neutron irradiated at temperatures in the range from 50°C to 250°C and subsequently stepwise annealed to about 600°C. The annealing behaviour was followed by Positron Annihilation Spectroscopy (PAS) and Transmission Electron Microscopy (TEM). In all cases an intense component with a positron lifetime of ∼ 180 ps due to defects was observed by PAS as well as a high density of Stacking Fault Tetrahedra (SFTs) by TEM. The measured lifetime is longer than expected for perfect SFTs. Although the decrease in the positron trapping rate follows closely the decrease in SFT density, it is still not completely certain as to whether PAS detects mainly the SFTs and not some other vacancy-like defects.

Original languageEnglish
Title of host publicationPositron Annihilation
Subtitle of host publicationProceedings of the 13th International Conference on Positron Annihilation, ICPA-13
EditorsToshio Hyodo, Haruo Saito, Yoshinori Kobayashi, Yasuyuki Nagashima
PublisherTrans Tech Publications Ltd
Pages21-25
Number of pages5
ISBN (Print)9780878499366
DOIs
Publication statusPublished - 2004
EventPositron Annihilation: Proceedings of the 13th International Conference on Positron Annihilation, ICPA-13 - Kyoto, Japan
Duration: 2003 Sep 72003 Sep 12

Publication series

NameMaterials Science Forum
Volume445-446
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Other

OtherPositron Annihilation: Proceedings of the 13th International Conference on Positron Annihilation, ICPA-13
CountryJapan
CityKyoto
Period03/9/703/9/12

Keywords

  • Copper
  • Defects
  • Neutron Irradiation
  • Positron Annihilation Spectroscopy
  • Positron Trapping Rates
  • Stacking Fault Tetrahedra
  • Transmission Electron Microscopy

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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