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, cilt.36, sa.2, ss.103-108, 2003 (SCI İndekslerine Giren Dergi) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 36 Konu: 2
  • Basım Tarihi: 2003
  • Doi Numarası: 10.1088/0022-3727/36/2/305
  • Dergi Adı: JOURNAL OF PHYSICS D-APPLIED PHYSICS
  • Sayfa Sayıları: ss.103-108

Özet

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.