Synthesis and thermoluminescent response to γ-rays and neutrons of MgB 4 O 7 :Dy and MgB 4 O 7 :Dy,Na.

Autor: Torres-Cortés CO; Programa de Doctorado en Ingeniería y Tecnología Aplicada, Unidad Academica de Ingeniería Eléctrica de la Universidad Autónoma de Zacatecas, Av. Ramón López Velarde No. 801, Col. Centro, 98000, Zacatecas, Zac, Mexico., Hernández-Adame L; CONACyT-Centro de Investigaciones Biológicas del Noroeste (CIBNOR), Instituto Politécnico Nacional No. 195, Playa Palo de Santa Rita Sur, 23090, La Paz, B.C.S, Mexico., Baltazar-Raigosa A; Programa de Doctorado en Ingeniería y Tecnología Aplicada, Unidad Academica de Ingeniería Eléctrica de la Universidad Autónoma de Zacatecas, Av. Ramón López Velarde No. 801, Col. Centro, 98000, Zacatecas, Zac, Mexico., Vega-Carrillo HR; Programa de Doctorado en Ingeniería y Tecnología Aplicada, Unidad Academica de Ingeniería Eléctrica de la Universidad Autónoma de Zacatecas, Av. Ramón López Velarde No. 801, Col. Centro, 98000, Zacatecas, Zac, Mexico; Unidad Académica de Estudios Nucleares de la Universidad Autónoma de Zacatecas, C. Ciprés No. 10, Fracc. La Peñuela, 98060, Zacatecas, Zac, Mexico. Electronic address: fermineutron@yahoo.com., Rodríguez-López JL; Advanced Materials Department, Instituto Potosino de Investigación Científica y Tecnológica, A.C., Camino a la Presa San José, 2055, Lomas 4(a) Seccion, 78216, San Luís Potosí, Mexico., Pérez-Arrieta ML; Unidad Académica de Física de la Universidad Autónoma de Zacatecas, C. Solidaridad, Col. Hidráulica, 98068, Zacatecas, Zac, Mexico.
Jazyk: angličtina
Zdroj: Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine [Appl Radiat Isot] 2019 May; Vol. 147, pp. 159-164. Date of Electronic Publication: 2019 Mar 06.
DOI: 10.1016/j.apradiso.2019.03.001
Abstrakt: MgB 4 O 7 doped with rare earths and alkaline elements has been reported as a good TLD because of its high sensitivity, effective atomic number close to that of biological tissue and low fading. In this work, thermoluminescent matrices were synthesized of MgB 4 O 7 :Dy and MgB 4 O 7 :Dy, Na to evaluate their thermoluminescent response (TL) when exposed to γ-rays and neutrons. The amount of Dy was studied in a concentration range of 0.01-1.5 mol% of total doping, while for Na the concentration of 0.5 mol% was established to determine the TL response as a function of doping. The synthesis of the powders was carried out by the method of wet reaction assisted by heat treatment and the samples were characterized by techniques of scanning electron microscopy and X-ray diffraction to determine the size of grain and crystallographic phase. For the dosimetric study, thermoluminescent phosphors were irradiated with a source of 137 Cs at an estimated dose 6.8 ± 0.4 mGy to evaluate their response to γ-rays exposure, while for neutrons a source of 241 AmBe was used (estimated dose of 3.1 ± 0.1 mGy). The thermoluminescent responses are similar for all materials exposed to γ-rays as for neutrons, the differences are shown to 280 °C, where a peak of high temperature is observed in materials exposed to neutrons.
(Copyright © 2019 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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