Preparation of CaSO4:Dy by precipitation method to gamma radiation dosimetry

T. Rivera, J. Roman, J. Azorín, R. Sosa, J. Guzmán, A. K. Serrano, M. García, G. Alarcón

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31 Scopus citations

Abstract

This paper presents the results of the preparation and characterization of dysprosium-doped calcium sulfate (CaSO4:Dy) phosphor, which was obtained by homogeneous precipitation from calcium acetate Ca(CH3COO-)2. Structural and morphological characteristics were studied using a scanning electronic microscope (SEM). The structure of all compounds was determined by X-ray diffraction method too. Thermoluminescence (TL) emission properties of CaSO4:Dy under gamma radiation effects were studied. This phosphor powder presented a TL glow curve with two peaks (Tmax) centered at around of 180 and 300 °C, respectively. The TL response of CaSO4:Dy as a function of gamma absorbed dose was linear in a wide range. Both emission and excitation spectra were also obtained. Results showed that this new preparation method of CaSO4:Dy TL phosphor is less expensive, cleaner and safer than the conventional preparation method.

Original languageEnglish
Pages (from-to)623-625
Number of pages3
JournalApplied Radiation and Isotopes
Volume68
Issue number4-5
DOIs
StatePublished - Apr 2010
Externally publishedYes

Keywords

  • CaSO
  • Chemical co-precipitation
  • Dosimetry
  • Dy
  • Gamma radiation
  • Thermoluminescence

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