Kinetics and trapping parameters of thermoluminescence in LiF TLD-100-dependence on dose

Kathuria, S. P.; Sunta, C.M.

doi:10.1088/0022-3727/12/9/020

Cited by 69 publications

(43 citation statements)

References 24 publications

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“…The pg' value is also unaffected by a change of dose. The same value of 0.46 was obtained with exposures 145 R (37.7 mC kg") and 1000 R (0.26 C kg") (Kathuria and Sunta 1979). As shown earlier (Kathuria and Sunta 1979) this value of pg' leads to an order of kinetics of 1.4.…”

Section: Cleaning the Glow Peakssupporting

confidence: 82%

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Fiber-Based Optical Deflection Sensor for Laser Induced Leaky Waves at Air–Solid Interfaces

Yan¹,

Shen²,

Lü³

et al. 2007

jjap

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Results are presented on the decay of glow peak V (190 "C) in powder as well as single crystal chip samples of LiF. The absence of peak IV (170°C) is confirmed and any contribution from higher temperature glow peaks is accounted for, to ascertain that the decay represents the uncontaminated peak V. It is also ascertained that the decrease in TL due to precipitation of impurities does not affect these decay data of comparatively short duration. The order of kinetics is determined by two methods: (i) isothermal decay and (ii) total glow peak. In addition, the applicability of a variable heating rate method is examined for inferring the order of kinetics. It is observed that the variable heating rate method is too insensitive for this purpose. The other two methods give identical values for the order of kinetics ( I = 1.6). The isothermal decay method is the most sensitive of all the methods. The discrepancy between this result and those of earlier workers is discussed.

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Section: Cleaning the Glow Peakssupporting

confidence: 82%

“…A dose dependent order of kinetics varying between 1 and 1.6 was reported by us for TL in LiF TLD-100 (Kathuria and Sunta 1979). This has been disputed by Lilley and Taylor (1981) in a recent Letter.…”

Section: Introductionmentioning

confidence: 85%

Fiber-Based Optical Deflection Sensor for Laser Induced Leaky Waves at Air–Solid Interfaces

Yan¹,

Shen²,

Lü³

et al. 2007

jjap

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“…One of the major properties of peak 5 in TLD is the strong stability of its activation energy over a wide range of absorbed dose. Kathuria and Sunta [39] investigated the dependence of the kinetics and trapping parameters of TLD 100 -on the irradiated dose level. Their result showed a very high stability of the activation energy of peak 5 over the exposure dose range 4 145 10 R -.…”

Section: The Glow-curve Analysis Under Usual Thermal Treatmentsmentioning

confidence: 99%

Similarities and differences between two different types of the thermoluminescence dosimeters belonging to the LiF family

Sadek

Khamis

Polymeris

et al. 2016

Phys. Status Solidi C

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The kinetic parameters of the glow‐peaks of Harshaw – LiF:Mg, Ti (TLD) and Poland – LiF:Mg,Ti (MTS) dosimeters were investigated at different dose levels using the computerized glow‐curve deconvolution (CGCD) algorithm. The results showed that the glow‐curve structure and the kinetic parameters of the MTS – 6 and the TLD dosimeter are identical. In addition, the glow‐curve structure and the kinetic parameters of the MTS – N and MTS – 7 dosimeters. However, unusual low activation energy (∼1.67 eV) and frequency factor (∼1015 s–1) values were detected for peak 5 of MTS – N, and MTS – 7 at the 50 Gy dose‐level. Moreover, unlike the activation energy and the frequency factor of peak 5 of the TLD dosimeters, the activation energy and the frequency factor of peak 5 of MTS – N and MTS – 7 are substantially dependent on the absorbed dose level. The results also showed that peak 2 of the same dosimeters has also unusual low activation energy and frequency factor values. However, these values showed high stability over the different dose levels. The explanations of these unusual behaviors of peak 5 were discussed and a correlation between peak 2 and peak 5 was pointed out.

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“…[19]). Although it would be unwise a t this stage to claim that simultaneous hole and electron release is the cause of these high values (other mechanisms must also be considered (e.g.…”

Section: Resultsmentioning

confidence: 99%

Thermoluminescence Governed by Simultaneous Thermal Stimulation of Electrons and Holes

Chen

Mathur

Rhodes

et al. 1984

Physica Status Solidi (b)

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The possibility of a simultaneous thermal release of electrons and holes in the tliermoluminescence (TL) process was suggested in the early stages of the development of this discipline. However, most investigators utilized a model in which carriers of only one kind are thermally released from their "traps". I n this model these carriers then radiatively recombine with carriers of opposite charge in "luminescence centers". This paper presents the results of a theoretical investigation into a more complex model, which allows the thermal release of electrons and holes in the same temperature range.The solution of a set of four simultaneous differential equations is required in this investigation. The equations are not amenable to analytical solution, so the equations are solved numerically for given values of the model parameters. Conclusions are drawn about the shapes of the TL curves, and the expected stability of the corresponding traps a t given temperatures, and the apparent effective parameters namely, the activation energy, the frequency factor, and the order of kinetics, are obtained using the "general order" formalism. In all cases examined, there is a good three parameter fit to the TL peak generated by the examined model. This shows that even a rather general TL peak can be described quite accurately by the three parameter model. The activation energy determined using the three parameter analysis is found to agree rather well with the input activation energy of trapped electrons which is used in the original peak generation for the particular cases examined. I n cases where the activation energy for holes is small,.the glow peaks occur a t relatively low temperatures, and are characterized by a very high effective frequency factor in the three parameter analysis. Furthermore, several cases are studied in which the calculated kinetics order is found to be less than 1.0.La possibilitk d'une liberation thermique simultanke des electrons a t des trous dana le processus de thermoluminescence avait 6tk suggkrke dans lea premieres ktapes du dkveloppement de cette discipline; mais la plupart des chercheurs ont prkfkr6 utiliser le modde plus restrictif oii un seul type de porteur de charge est libere thermiquement des pieges pour ensuite se recombiner avee des porteurs de signe oppos6 dans les "centres". Dans cet article, nous traitons le cas plus complexe oh les electrons et les trous peuvent btre libkrks dans le mbme domaine de tempbrature. Cela appelle la solution d'un systbme de quatre equations differkntielles simultankes, ce qu'on ne sait bien faire analytiquement. Au lieu de cela, c'est une methode numeriquk que nous utilisons pour rksoudre ce systeme d'equations pour des valeurs donnkes des parambtres. Nous sommes ainsi parvenu Zt des conclusions, concernant la forme des courbes de TL obtenues, la stabilitk des pikges correspondants it attendre des temperatures donnkes, et les valeurs effectives des parambtres qu on pourrait dkduire d une approche par la methode de "l'ordre gknkral"; savoir, l'energie #act...

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Kinetics and trapping parameters of thermoluminescence in LiF TLD-100-dependence on dose

Cited by 69 publications

References 24 publications

Fiber-Based Optical Deflection Sensor for Laser Induced Leaky Waves at Air–Solid Interfaces

Fiber-Based Optical Deflection Sensor for Laser Induced Leaky Waves at Air–Solid Interfaces

Similarities and differences between two different types of the thermoluminescence dosimeters belonging to the LiF family

Thermoluminescence Governed by Simultaneous Thermal Stimulation of Electrons and Holes

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