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

Autor: Rivera T; Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada-IPN, Unidad Legaria, México DF, Mexico. trivera@ipn.mx, Roman J, Azorín J, Sosa R, Guzmán J, Serrano AK, García M, Alarcón G
Jazyk: angličtina
Zdroj: Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine [Appl Radiat Isot] 2010 Apr-May; Vol. 68 (4-5), pp. 623-5. Date of Electronic Publication: 2009 Sep 19.
DOI: 10.1016/j.apradiso.2009.09.033
Abstrakt: 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.
(Copyright 2009 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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