Short-living defects and recombination processes in Li 6Gd(BO3)3 crystals

I. N. Ogorodnikov, N. E. Poryvay, V. A. Pustovarov, A. V. Tolmachev, R. P. Yavetskiy, V. Yu Yakovlev

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Results of a study of transient optical absorption (TOA) and luminescence of lithium-gadolinium orthoborate Li6Gd(BO3)3 (LGBO) in the visible and ultraviolet spectral regions are presented. As revealed by absorption optical spectroscopy with nanosecond time resolution, the LGBO TOA derives from optical transitions in hole centers, with the optical density relaxation kinetics being mediated by interdefect tunneling recombination involving these centers and neutral lithium atoms acting as electronic Li0 centers. At 290 K, the Li0 centers are involved in thermally stimulated migration, which is not accompanied by carrier transfer to the conduction or valence band. The slow TOA decay kinetics components, with characteristic times ranging from a few milliseconds to seconds, have been assigned to diffusion-limited annihilation of lithium interstitials with vacancies. The mechanisms responsible for the creation and relaxation of short-living Frenkel defect pairs in the LGBO cation sublattice have been analyzed.

Original languageEnglish
Pages (from-to)336-339
Number of pages4
JournalRadiation Measurements
Volume45
Issue number3-6
DOIs
Publication statusPublished - Mar 2010

Fingerprint

Light absorption
Lithium
optical absorption
Defects
Crystals
lithium
defects
crystals
Kinetics
Optical transitions
Density (optical)
Gadolinium
Valence bands
Frenkel defects
Conduction bands
Vacancies
Luminescence
optical density
kinetics
gadolinium

Keywords

  • Lattice defects
  • LiGd(BO)
  • Lithium borate crystals
  • Optical spectroscopy
  • Time-resolution

ASJC Scopus subject areas

  • Radiation
  • Instrumentation

Cite this

Ogorodnikov, I. N., Poryvay, N. E., Pustovarov, V. A., Tolmachev, A. V., Yavetskiy, R. P., & Yakovlev, V. Y. (2010). Short-living defects and recombination processes in Li 6Gd(BO3)3 crystals. Radiation Measurements, 45(3-6), 336-339. https://doi.org/10.1016/j.radmeas.2010.01.039

Short-living defects and recombination processes in Li 6Gd(BO3)3 crystals. / Ogorodnikov, I. N.; Poryvay, N. E.; Pustovarov, V. A.; Tolmachev, A. V.; Yavetskiy, R. P.; Yakovlev, V. Yu.

In: Radiation Measurements, Vol. 45, No. 3-6, 03.2010, p. 336-339.

Research output: Contribution to journalArticle

Ogorodnikov, IN, Poryvay, NE, Pustovarov, VA, Tolmachev, AV, Yavetskiy, RP & Yakovlev, VY 2010, 'Short-living defects and recombination processes in Li 6Gd(BO3)3 crystals', Radiation Measurements, vol. 45, no. 3-6, pp. 336-339. https://doi.org/10.1016/j.radmeas.2010.01.039
Ogorodnikov, I. N. ; Poryvay, N. E. ; Pustovarov, V. A. ; Tolmachev, A. V. ; Yavetskiy, R. P. ; Yakovlev, V. Yu. / Short-living defects and recombination processes in Li 6Gd(BO3)3 crystals. In: Radiation Measurements. 2010 ; Vol. 45, No. 3-6. pp. 336-339.
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