Characterization and thermoluminescence study of gamma irradiated Tb-doped ZnO and undoped ZnO synthesized by spray pyrolysis method

High gamma dose-resistant undoped ZnO and Tb-doped ZnO thermoluminescent (TL) micro-phosphors were prepared by the spray pyrolysis method. Scanning electron microscopy shows crystalline rods with hexagonal morphology, (0.1-0.4 µm diameter, and about 1 µm length). Raman spectra dispersion reveals a...

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Autores principales:	Alejandro Ortiz-Morales, Manuel García-Hipólito, Epifanio Cruz-Zaragoza, Ramón Gómez-Aguilar
Formato:	article
Lenguaje:	EN ES
Publicado:	Universidad De La Salle Bajío 2021
Materias:	ionizing radiation effects thermoluminescence kinetic parameters micro-material scanning electron microscopy Raman dispersion Science Q Science (General) Q1-390 Social Sciences H Social sciences (General) H1-99
Acceso en línea:	https://doaj.org/article/b4896c42013540c2b7741123d51c4ae3
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spelling	oai:doaj.org-article:b4896c42013540c2b7741123d51c4ae32021-12-05T15:11:00ZCharacterization and thermoluminescence study of gamma irradiated Tb-doped ZnO and undoped ZnO synthesized by spray pyrolysis method10.21640/ns.v13i27.28772007-0705https://doaj.org/article/b4896c42013540c2b7741123d51c4ae32021-11-01T00:00:00Zhttp://novascientia.delasalle.edu.mx/ojs/index.php/Nova/article/view/2877https://doaj.org/toc/2007-0705 High gamma dose-resistant undoped ZnO and Tb-doped ZnO thermoluminescent (TL) micro-phosphors were prepared by the spray pyrolysis method. Scanning electron microscopy shows crystalline rods with hexagonal morphology, (0.1-0.4 µm diameter, and about 1 µm length). Raman spectra dispersion reveals a würtzite form. Photoluminescence (PL) study of irradiated zinc oxide films indicates the generation of defects produced by gamma irradiation resulting in an increased probability of electron-hole exciton recombination. PL spectrum shows emission bands from 5D4-7Fj=6,5,4,3 transitions ascribed to Tb3+ dopant in zinc oxide phosphor. X-ray diffraction patterns for both types of films growth (undoped ZnO and Tb-doped ZnO) are typical of zinc oxide crystalline structure, with no noticeable effect of Tb ions. Dosimetric properties, for both samples, show a low TL fading signal and TL reproducibility signal for undoped ZnO and Tb-doped ZnO samples was 29 and 57 %, respectively. The kinetic parameters such as activation energy E, frequency factor s, and Rm values, were obtained by Computerized Glow Curve Deconvolution (CGCD) assuming Mixed Order Kinetic model (MOK). The results show that the MOK well described the glow curves of zinc oxide films. The heating rate effects produced a broadening of glow peak located at 420 K. For purposes like radiation detector, atomic effective number (Zeff) was obtained: 27.74 and 56.47 for undoped ZnO and Tb-doped ZnO samples, respectively. The samples were exposed to gamma radiation in a wide range of 0.25–20 kGy dose. TL properties of undoped ZnO and Tb-doped ZnO samples show that these materials could be used to detect high doses in a gamma radiation field. Alejandro Ortiz-MoralesManuel García-HipólitoEpifanio Cruz-ZaragozaRamón Gómez-AguilarUniversidad De La Salle Bajíoarticleionizing radiation effectsthermoluminescencekinetic parametersmicro-materialscanning electron microscopyRaman dispersionScienceQScience (General)Q1-390Social SciencesHSocial sciences (General)H1-99ENESNova Scientia, Vol 13, Iss 27 (2021)
institution	DOAJ
collection	DOAJ
language	EN ES
topic	ionizing radiation effects thermoluminescence kinetic parameters micro-material scanning electron microscopy Raman dispersion Science Q Science (General) Q1-390 Social Sciences H Social sciences (General) H1-99
spellingShingle	ionizing radiation effects thermoluminescence kinetic parameters micro-material scanning electron microscopy Raman dispersion Science Q Science (General) Q1-390 Social Sciences H Social sciences (General) H1-99 Alejandro Ortiz-Morales Manuel García-Hipólito Epifanio Cruz-Zaragoza Ramón Gómez-Aguilar Characterization and thermoluminescence study of gamma irradiated Tb-doped ZnO and undoped ZnO synthesized by spray pyrolysis method
description	High gamma dose-resistant undoped ZnO and Tb-doped ZnO thermoluminescent (TL) micro-phosphors were prepared by the spray pyrolysis method. Scanning electron microscopy shows crystalline rods with hexagonal morphology, (0.1-0.4 µm diameter, and about 1 µm length). Raman spectra dispersion reveals a würtzite form. Photoluminescence (PL) study of irradiated zinc oxide films indicates the generation of defects produced by gamma irradiation resulting in an increased probability of electron-hole exciton recombination. PL spectrum shows emission bands from 5D4-7Fj=6,5,4,3 transitions ascribed to Tb3+ dopant in zinc oxide phosphor. X-ray diffraction patterns for both types of films growth (undoped ZnO and Tb-doped ZnO) are typical of zinc oxide crystalline structure, with no noticeable effect of Tb ions. Dosimetric properties, for both samples, show a low TL fading signal and TL reproducibility signal for undoped ZnO and Tb-doped ZnO samples was 29 and 57 %, respectively. The kinetic parameters such as activation energy E, frequency factor s, and Rm values, were obtained by Computerized Glow Curve Deconvolution (CGCD) assuming Mixed Order Kinetic model (MOK). The results show that the MOK well described the glow curves of zinc oxide films. The heating rate effects produced a broadening of glow peak located at 420 K. For purposes like radiation detector, atomic effective number (Zeff) was obtained: 27.74 and 56.47 for undoped ZnO and Tb-doped ZnO samples, respectively. The samples were exposed to gamma radiation in a wide range of 0.25–20 kGy dose. TL properties of undoped ZnO and Tb-doped ZnO samples show that these materials could be used to detect high doses in a gamma radiation field.
format	article
author	Alejandro Ortiz-Morales Manuel García-Hipólito Epifanio Cruz-Zaragoza Ramón Gómez-Aguilar
author_facet	Alejandro Ortiz-Morales Manuel García-Hipólito Epifanio Cruz-Zaragoza Ramón Gómez-Aguilar
author_sort	Alejandro Ortiz-Morales
title	Characterization and thermoluminescence study of gamma irradiated Tb-doped ZnO and undoped ZnO synthesized by spray pyrolysis method
title_short	Characterization and thermoluminescence study of gamma irradiated Tb-doped ZnO and undoped ZnO synthesized by spray pyrolysis method
title_full	Characterization and thermoluminescence study of gamma irradiated Tb-doped ZnO and undoped ZnO synthesized by spray pyrolysis method
title_fullStr	Characterization and thermoluminescence study of gamma irradiated Tb-doped ZnO and undoped ZnO synthesized by spray pyrolysis method
title_full_unstemmed	Characterization and thermoluminescence study of gamma irradiated Tb-doped ZnO and undoped ZnO synthesized by spray pyrolysis method
title_sort	characterization and thermoluminescence study of gamma irradiated tb-doped zno and undoped zno synthesized by spray pyrolysis method
publisher	Universidad De La Salle Bajío
publishDate	2021
url	https://doaj.org/article/b4896c42013540c2b7741123d51c4ae3
work_keys_str_mv	AT alejandroortizmorales characterizationandthermoluminescencestudyofgammairradiatedtbdopedznoandundopedznosynthesizedbyspraypyrolysismethod AT manuelgarciahipolito characterizationandthermoluminescencestudyofgammairradiatedtbdopedznoandundopedznosynthesizedbyspraypyrolysismethod AT epifaniocruzzaragoza characterizationandthermoluminescencestudyofgammairradiatedtbdopedznoandundopedznosynthesizedbyspraypyrolysismethod AT ramongomezaguilar characterizationandthermoluminescencestudyofgammairradiatedtbdopedznoandundopedznosynthesizedbyspraypyrolysismethod
_version_	1718371317259960320

Characterization and thermoluminescence study of gamma irradiated Tb-doped ZnO and undoped ZnO synthesized by spray pyrolysis method

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