Preparation of CaSO4:Dy by precipitation method to gamma radiation dosimetry.
This paper presents the results of the preparation and characterization of dysprosium-doped calcium sulfate (CaSO(4):Dy) phosphor, which was obtained by homogeneous precipitation from calcium acetate Ca(CH(3)COO(-))(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 CaSO(4):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 degrees C, respectively. The TL response of CaSO(4):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 CaSO(4):Dy TL phosphor is less expensive, cleaner and safer than the conventional preparation method.
Rivera
T
T
Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada-IPN, Unidad Legaria, México DF, Mexico. trivera@ipn.mx
Roman
J
J
Azorín
J
J
Sosa
R
R
Guzmán
J
J
Serrano
A K
AK
García
M
M
Alarcón
G
G
D002133:Calcium Sulfate / Q000138:chemical synthesis* / Q000528:radiation effects*; D011232:Chemical Precipitation; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005720:Gamma Rays; D008422:Materials Testing; D011829:Radiation Dosage; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013819:Thermoluminescent Dosimetry / Q000295:instrumentation* / Q000379:methods
D002133:Calcium Sulfate