Applied Physics A

, Volume 35, Issue 4, pp 249–253 | Cite as

Disclosure of defects in YAG crystals by the thermoluminescence method

  • A. Niklas
Contributed Papers

Abstract

The topograms revealing the anisotropic distribution of defects in the volume of monocrystalline YAG samples have been obtained by the thermoluminescence (TL) technique. It has also been shown that the anisotropic distribution of the lattice defects affects strongly the shape of the TL curves. The greatest changes in the TL intensity were observed in the areas of the samples distributed symmetrically every 120°. It was noted that the selective distribution of the TL intensity is caused mainly by the presence of the (211) facets as well as growth striations formed during the growth process. The groups of lines observed in the TL spectrum have been ascribed to the Tb3+ ions, excited owing to the radiationless energy transfer from the bound exciton states (BES).

PACS

61.70 61.80 71.35 78.55 

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Copyright information

© Springer-Verlag 1984

Authors and Affiliations

  • A. Niklas
    • 1
  1. 1.Physics InstituteTeacher's AcademyOpolePoland

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