Photo-stimulated luminescence of calcium co-doped BaFBr : Eu2+ x-ray storage phosphors

SCHLAPP M., Bulur E., VON SEGGERN H.

JOURNAL OF PHYSICS D-APPLIED PHYSICS, vol.36, no.2, pp.103-108, 2003 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 36 Issue: 2
  • Publication Date: 2003
  • Doi Number: 10.1088/0022-3727/36/2/305
  • Journal Name: JOURNAL OF PHYSICS D-APPLIED PHYSICS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.103-108
  • Middle East Technical University Affiliated: No

Abstract

The influence of calcium co-doping on the optical properties of the x-ray storage phosphor BaFBr: Eu2+, is determined by photo- stimulated luminescence techniques. It is found that the incorporation of calcium into the lattice results in a broadening of the photo- stimulation peak due to a calcium induced FA(Br, Ca2+)-centre with stimulation maxima at 540 and 680 nm. The optical cross-sections for the photo- stimulated process are determined by utilizing stimulation light with linearly increasing intensity. Furthermore, it is shown that the sensitivity for x-rays, i.e. the number of storage centres formed during x-ray exposure, increases up to a doping level of 1 mol% while it drops rapidly at higher calcium concentrations.