On the general-order kinetics of the thermoluminescence glow peak

Rasheedy, M.S.

doi:10.1088/0953-8984/5/5/014

Cited by 87 publications

(59 citation statements)

References 8 publications

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“…The sample temperature was raised at the constant heating rate of 0.25 K s −1 , and the total emitted radiation was collected by a photomultiplier EMI-9816 QB. The experimental curve was analyzed according to the generalized-order kinetic model of TSL [32,33].…”

Section: Experimental Methodologymentioning

confidence: 99%

X-ray induced color change on dense yttria samples obtained by spark plasma sintering

Attia¹,

Garroni²,

Chiriu³

et al. 2015

Chemical Physics Letters

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Section: Experimental Methodologymentioning

confidence: 99%

X-ray induced color change on dense yttria samples obtained by spark plasma sintering

Attia¹,

Garroni²,

Chiriu³

et al. 2015

Chemical Physics Letters

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“…However, empirical analytical expressions describing second and GO TL kinetics predict a change of the shape of TL glow curves, as well as a shift of T max with the irradiation dose [5,6,14,15]. The analytical expression for the empirical GO kinetics equation is [15]:…”

mentioning

confidence: 99%

Prevalence of first‐order kinetics in thermoluminescence materials: An explanation based on multiple competition processes

Pagonis

Kitis

2012

Physica Status Solidi (b)

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Typical materials used in thermoluminescence (TL) dosimetry exhibit the following common characteristics: (i) the temperature of glow peak maximum of individual glow peaks remains practically constant over a wide dose range, (ii) there are no systematic changes in the glow curve shapes with the irradiation dose, and (iii) higher order kinetics is rarely seen in dosimetric materials, while first-order kinetics is a common occurrence in experimental TL work. Theoretical explanation of these experimental characteristics is an open topic of TL research. In the present work these three characteristics are studied by using several models of increasing complexity. The simplest model studied is based on the empirical analytical general order (GO) expressions, followed by two commonly used models, the wellknown one trap one recombination center models (OTOR) and the interactive multiple trap system (IMTS). Previous researchers have studied the behavior of these models using arbitrary values of the kinetic parameters in the models, and by varying these parameters within limited physically reasonable ranges. In this paper, a new method of analyzing the results from such models is presented, in which the average behavior of real dosimetric materials is simulated by allowing simultaneous random variations of the kinetic parameters, within several orders of magnitude. The simulation results lead to the conclusion that the presence of many competitive processes during the heating stage of TL, may be correlated to the remarkable stability of the glow curve shapes exhibited by most materials, and to the prevalence of first-order kinetics. This correlation is demonstrated further by a series of simulations in which the number of competitor traps is increased systematically, by adding up to 12 competitor traps in the IMTS model. As the number of competitor traps increases, the average behavior of the TL glow curves tends progressively toward firstorder kinetics, and this in turn results in very small average variations in the shape of the TL glow peak. The simulation results in this paper provide a convincing demonstration and explanation of the stability of the shape of TL glow curves in dosimetric materials, and for the prevalence of first-order kinetics in TL.

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“…Para superar este problema Rasheedy [48] propôs uma nova forma para o modelo, partindo da equação 2.31:…”

Section: Modelo De Ordem Geralunclassified

Propriedades de termoluminescência, de ressonância paramagnética eletrônica e de centros de cor de diopsídio

Mamani¹

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AgradecimentosApesar de uma tese ser um trabalho individual, sempre existem contribuições, de natureza diversa, que devem ser realçadas. Por esta razão, desejo expressar meus sinceros agradecimentos:Ao Prof. Dr. Shigueo Watanabe, pela dedicação revelada ao longo destes anos, pelas críticas e sugestões relevantes feitas durante a orientação deste trabalho. A Enga . Elizabeth Somessari Ribeiro e ao Eng o . Carlos Gaia de Silveira do CTR-IPEN pela irradiação das amostras. Ao Laboratório de Cristalografia do IF-USP pelas medidas de difração de raio-xAo Dr. Juan Carlos Ramirez Mittani pelas suas sugestões e sua colaboração na obtenção dos espectros de emissão TL.Ao Dr. José Roberto Braz Paião pela ajuda na obtenção das amostras artificiais.A CAPES, pelo apoio financeiro durante o desenvolvimento do presente trabalho.A Sra. Edna A. S. Toledo pela sua disposição para ajudar sempre.Ao pessoal técnico e administrativo do DFN eà Comissão de Pós-Graduação do Instituto de Física da USP.Aos colegas do LACIFID pela excelente relação pessoal e profissional que criamos, a qual espero que não se perca: José Fernando, Walter, Susana, Gilberto, Juan Carlos, José Roberto, Lara, Roseli, Henry, Wilmer, Luiz, Cassiano, Thiago, René e Dennis.Aos meus grandes amigos de sempre: Jessica, Henry, Gabriel, Bertha, Alberto, Carlos Alberto e em especial a Alejandro, pelo apoio e amizade em todos os momentos.A Luz, a pessoa mais corajosa que passou em minha vida, pelo apoio incondicional, carinho e, acima de tudo, pela enorme paciência comigo.A minha família, pelo estímulo e apoio incondicional desde a primeira hora; pela paciência, compreensão e grande amizade com que sempre me assistiram. Samples annealed at 600°C for one hour, to eliminate previously induced TL, and irradiated at several γ-doses, presented glow curves with TL peaks around 160, 300, 350 and 450°C. Later on, the broad peak around 160°C was proved to be a superposition of peaks at 160, 197 and 230°C. The pure synthetic diopside presented TL peaks at 160 to 350°C, indicating that these peaks are due to intrinsic defects.

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On the general-order kinetics of the thermoluminescence glow peak

Cited by 87 publications

References 8 publications

X-ray induced color change on dense yttria samples obtained by spark plasma sintering

X-ray induced color change on dense yttria samples obtained by spark plasma sintering

Prevalence of first‐order kinetics in thermoluminescence materials: An explanation based on multiple competition processes

Propriedades de termoluminescência, de ressonância paramagnética eletrônica e de centros de cor de diopsídio

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