Effect of La doping on calcium tungstate (CaWO

S. Baccaro, P. Bohacek, A. Cecilia, V. Laguta, M. Montecchi, E. Mihokova, M. Nikl

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Abstract

The induced absorption spectra were measured for equally grown CaWO4and CaWO4:La single crystals after60Co radioisotope irradiation by doses within 1 to 230 Gy. La doping increases considerably the radiation hardness of CaWO4material similarly as was observed for isostructural PbWO4single crystals recently. Transmission of as grown undoped CaWO4shows a noticeable decrease below 450 nm, which gives the evidence of deep trapping states. These trapping centres are effectively diminished by La doping as well. Induced absorption bands are discussed in the light of known and hypothesized color centers in CaWO4and PbWO4single crystals, which were reported earlier in the literature.
Original languageEnglish
Pages (from-to)799 - 804
Number of pages6
JournalPhysica Status Solidi (A) Applied Research
Volume178
Issue number2
DOIs
Publication statusPublished - 2000

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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