Novel Tool to Determine Kinetic Parameters of Thermoluminescence (TL) Glow Curve—CGCD: CaZrO3: Eu3+, Tb3+

2019 ◽  
pp. 795-803
Author(s):  
Shubha Tripathi ◽  
Vikarm Awate ◽  
K. K. Kushwah ◽  
Ratnesh Tiwari ◽  
Nigama Prasan Sahoo
Keyword(s):  
Kinetic Parameters ◽  
Glow Curve

Comparative study of kinetic parameters induced by different excitation sources: using a novel and user-friendly glow curve deconvolution spreadsheet

2018 ◽  
Vol 29 (18) ◽  
pp. 15732-15740 ◽  
Author(s):  
H. Durán-Muñoz ◽  
M. Hernández-Ortíz ◽  
C. Sifuentes-Gallardo ◽  
J. I. Galván-Tejeda ◽  
R. Sánchez-Zeferino ◽  
...  
Keyword(s):  
Comparative Study ◽  
Kinetic Parameters ◽  
Glow Curve ◽  
User Friendly

Characterizing the Dosimetric Properties of MEH-PPV Using Thermoluminescence (TL)

2014 ◽  
Vol 1613 ◽  
pp. 127-131 ◽  
Author(s):  
Alejandro Ortiz-Morales ◽  
Ramón Gómez-Aguilar ◽  
Jaime Ortiz-Lopez ◽  
Epifanio Cruz-Zaragoza
Keyword(s):  
Conjugated Polymers ◽  
Kinetic Parameters ◽  
Dose Response ◽  
Glow Curve ◽  
Dose Range ◽  
Complex Structures ◽  
Order Model

ABSTRACTThe thermoluminiscent properties of MEH-PPV and MDMO-PPV conjugated polymers were studied in order to verify if they are suitable for use as TL dosimeter. The dose response that was analyzed cover the wide dose range 0.34-5.44 kGy. The measured glow curves show complex structures which were evaluated with kinetic parameters based on the MO (Mix Order) model together with the CGCD (Computerized Glow Curve Deconvolution) homemade program which is useful to understand the mechanisms responsible for TL emission.

scholarly journals Glow curve analysis by Gauss-Lorentz function

2013 ◽  
Vol 28 (1) ◽  
pp. 45-51 ◽  
Author(s):  
Zdravko Vejnovic ◽  
Milos Pavlovic ◽  
Marina Kutin ◽  
Milorad Davidovic
Keyword(s):  
Activation Energy ◽  
Kinetic Model ◽  
Kinetic Parameters ◽  
Glow Curve ◽  
Curve Analysis ◽  
Geometric Parameters ◽  
Experimental Curve ◽  
Kinetics Model ◽  
Exponential Factor ◽  
Mixed Order

A new method for fitting glow curves, described in a mixed order kinetics model, with Gauss-Lorentz function is shown. Theoretical expressions of the mixed order kinetics model are shown in a new way, so that the values of kinetic parameters can be obtained through the geometric parameters. When the model is described in this way it is possible to calculate precisely the kinetic parameters such as activation energy, pre-exponential factor and the factor a= n0/(h + n0). At the same time, obtained values of geometric parameters of the experimental curve, which is described with the Gauss-Lorentz function, can be used to estimate the kinetic model, in which thermoluminescence relaxation occurs. This gives a possibility of a new application of Gauss-Lorentz function to be used as a criterion for assessing model of relaxation, when it is not known in advance. The accuracy of fitting is studied, for the specific cases of computer simulated thermoluminescent curves with one peak.

scholarly journals Estimate the lifetime of thermoluminescence traps in general-orders of kinetics model of chilli powder samples by using the R package TGCD

2017 ◽  
Vol 1 (T4) ◽  
pp. 71-78
Author(s):  
Sang Duy Nguyen ◽  
Hung Van Tran ◽  
Hien Quoc Nguyen ◽  
Hung Van Nguyen
Keyword(s):  
Kinetic Parameters ◽  
Gamma Rays ◽  
Glow Curve ◽  
R Package ◽  
Kinetics Model ◽  
Recombination Probability ◽  
Order Of Kinetics ◽  
Three Samples ◽  
Powder Samples ◽  
Different Doses

The kinetic parameters of thermoluminescene (TL) glow peaks of chilli powder irradiated by gamma rays with the different doses of 0, 4 and 8 kGy (i.e. activation energies (E), order of kinetics (b), trapping and recombination probability coefficients (R) and frequency factors (s)) have been determined and evaluated by glow curve deconvolution (GCD) method using the glow curve data to estimate lifetime of TL traps. The kinetic parameters of TL glow peaks are calculated by modeled first-, second-, generalorders of kinetics (GOK) thanking to the computer by using the R package TGCD. The results obtained as comparing the lifetime values of the three samples showed that the values of the 8 kGy irradiated-samples were the lowest whereas the 4 kGy irradiated-samples’value were greater than the non-irradiated samples’ one time.

scholarly journals Calculation of parameters for the model of an ideal phosphor

2016 ◽  
Vol 31 (2) ◽  
pp. 111-120 ◽  
Author(s):  
Zdravko Vejnovic ◽  
Milos Pavlovic ◽  
Pavle Hadzic ◽  
Milorad Davidovic
Keyword(s):  
Activation Energy ◽  
Kinetic Parameters ◽  
Glow Curve ◽  
Filling Factor ◽  
Frequency Factor ◽  
Physical Parameters ◽  
Calculation Of Parameters ◽  
Kinetics Order

Equations for the calculation of kinetic parameters of thermoluminescent processes are theoretically derived for a model of an ideal phosphor. The values used in the calculation are obtained from glow curves and the function that describes the normalized glow curve generated. On the basis of this function, the equations for activation energy, frequency factor, and retrapping factor, were derived. All expressions are valid for a general case, when the filling factor of traps is f0?1. The concept of kinetics order was used for the calculation of parameters and the parameter of kinetics order was defined by means of real physical parameters. Results obtained by the analysis of synthetic curves and experimental glow curves of phosphor materials provide a deeper understanding of thermoluminescent kinetics.

A NEW THERMOLUMINESCENCE GENERAL ORDER GLOW CURVE FIT FUNCTION CONSIDERING THERMAL QUENCHING EFFECT

2019 ◽  
Vol 187 (1) ◽  
pp. 103-107
Author(s):  
S Harooni ◽  
M Zahedifar ◽  
E Sadeghi ◽  
Z Ahmadian
Keyword(s):  
Kinetic Parameters ◽  
Glow Curve ◽  
Thermal Quenching ◽  
Glow Peak ◽  
Heating Rates ◽  
Order Model ◽  
Quenching Effect ◽  
Fitting Procedure ◽  
Curve Fit ◽  
General Order

Abstract A new thermoluminescence (TL) general order glow curve fit function in terms of the intensity of peak maximum, Im and the peak temperature, Tm is presented in which thermal quenching (TQ) effect has been taken into account. Also, the conventional general order model and the new presented function were fitted to the glow peak 5 of LiF:Mg,Ti (TLD-100) and the kinetic parameters were obtained for different heating rates as the results of fitting procedure. It was found that increasing the heating rate, which makes the TQ more prominent, causes more divergence between the kinetic parameters extracted by applying two models. Considering that the TL intensity and the glow peak area reduce with shifting the glow peak to higher temperatures as a result of TQ, the new presented function gives more reliable results for the kinetic parameters.

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