Applied physics

, Volume 4, Issue 1, pp 79–82 | Cite as

Thermal expansion effects in positron lifetimes

  • H. C. Jamieson
  • B. T. A. McKee
  • A. T. Stewart
Contributed Papers

Abstract

The precision of relative positron lifetime measurements is now sufficient to observe directly changes due to lattice thermal expansion. This information is necessary for the determination of accurate vacancy formation energies from positron annihilation data obtained over a higher temperature range. Measurements have been made of the change in positron lifetime in the metals Au, Ag, Cu, and Al over the temperature range 100–300 K where there is no contribution from positron trapping at vacancies. The results are compared with theoretical calculations which take account of positron annihilations with both valence and core electrons.

Index Headings

Positron lifetime Positron annihilations 

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Copyright information

© Springer-Verlag 1974

Authors and Affiliations

  • H. C. Jamieson
    • 1
  • B. T. A. McKee
    • 1
  • A. T. Stewart
    • 1
  1. 1.Department of PhysicsQueen's UniversityKingstonCanada

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