An Overview on Peak Shape Method for Thermoluminescence Glow Curve Analysis

2018 ◽  
pp. 26-52
Author(s):  
Sukhamoy Bhattacharyya ◽  
Partha Sarathi Majumdar
Keyword(s):  
Activation Energy ◽  
Glow Curve ◽  
Frequency Factor ◽  
Curve Analysis ◽  
Peak Shape ◽  
Order Of Kinetics ◽  
Symmetry Factor ◽  
Alternative Approach ◽  
General Order ◽  
Thermoluminescence Glow Curve

The shape of a thermoluminescence (TL) glow curve has fundamental importance for calculating the characteristic parameters of trap levels within the band gap. TL analysis are mostly based on the three-parameter general order kinetics model. The parameters are activation energy, order of kinetics, and frequency factor. Peak shape method is one of the most prominent methods for extracting the activation energy from a TL curve. An overview of different peak shape methods along with an alternative approach formulated directly from basic TL equations is presented in this chapter. Generally, peak shape method requires prior knowledge of order of kinetics to determine activation energy which creates a difficulty due to the non-uniqueness of symmetry factor for a particular value of order of kinetics. A modified version of peak shape method which is free from this constraint is discussed here. Activation energies from experimental curves of tremolite and actinolite are estimated using peak shape method. Limitation of peak shape method for saturated TL peaks with heavy retrapping is also discussed.

Three-Point Area Method for Thermoluminescence Glow Curve Analysis and Its Application to the Glow Peak of K2SrP2O7:Pr

2021 ◽  
Author(s):  
M Kundu ◽  
S Bhattacharyya ◽  
M Karmakar ◽  
P S Majumdar
Keyword(s):  
Activation Energy ◽  
Area Under The Curve ◽  
Glow Peak ◽  
Quasi Equilibrium ◽  
Systematic Analysis ◽  
Order Of Kinetics ◽  
Complete Study ◽  
General Order ◽  
Data Points ◽  
Thermoluminescence Glow Curve

Abstract A method has been proposed to evaluate the kinetic parameters, viz. activation energy ($E$) and order of kinetics ($b$) from a single or isolated thermoluminescence (TL) glow peak. Along with the area under the entire curve, this method uses a set of three arbitrary data points and calculates the partial area under the curve from each point to the endpoint. In this way, the entire information associated with the curve is used and the method is named as ‘Three-Point Area’ (TPA) method. We have applied it successfully on a number of theoretically simulated TL curves generated in One Trap One Recombination centre (OTOR) model and General-Order Kinetics (GOK) model under quasi-equilibrium approximations with linear heating scheme. The activation energies are found in good agreement with input values for both the models. For OTOR model, temperature average of order of kinetics is estimated to compare with the present result. Systematic analysis is carried out for estimation of errors inherent in the method in the purview of GOK model. A closer look on the results reveals that any set of three points, preferably chosen from the rising side of the curve, can yield activation energy and order of kinetics. The validity of the method to extract $E$ and $b$ from experimental glow curves is exemplified by considering experimental TL data reported in literature. Finally, a complete study starting from the synthesis of a new phosphor $\mathrm{K_2SrP_2O_7:Pr} $ and analysis of the recorded TL data to estimate $E$ and $b$ employing the TPA method has been reported.

scholarly journals Analysis of the thermoluminescent of borate glass by computerized glow curve deconvolution in kinetic formalism

2021 ◽  
Vol 2070 (1) ◽  
pp. 012009
Author(s):  
S. Nabadwip Singh
Keyword(s):  
Activation Energy ◽  
Glow Curve ◽  
Borate Glass ◽  
Frequency Factor ◽  
Activation Energies ◽  
Suitable Material ◽  
Order Of Kinetics ◽  
Thermoluminescence Dosimetry

Abstract Borate based phosphor is a suitable material for thermoluminescence dosimetry. Glow curves of β-irradiated pure borate glass has been analyzed by restoring to Computerized Glow Curve Deconvolution (CGCD) technique and evaluate the trapping parameters namely activation energy (E), frequency factor (s) and order of kinetics (b). It is observed that there are stable peaks in the range 110° to 150°C even to various extent of thermal cleaned ones also. The activation energies of the phosphor are in the range 0.898 to 1.325 eV and frequency factors are in the order of 1011 to 1013 s−1.

On temperature-dependent frequency factor in thermoluminescence measured with a hyperbolic heating profile

2001 ◽  
Vol 79 (9) ◽  
pp. 1133-1139 ◽  
Author(s):  
W S Singh ◽  
M Bhattacharya ◽  
S D Singh ◽  
P S Mazumdar
Keyword(s):  
Activation Energy ◽  
Temperature Dependence ◽  
Frequency Factor ◽  
Temperature Dependent ◽  
Order Of Kinetics ◽  
Dependent Frequency ◽  
Symmetry Factor ◽  
Heating Profile

In this paper, we investigate the consequences of the temperature dependence of the frequency factor on thermoluminescence peaks recorded in a hyperbolic heating profile. The temperature dependence of the frequency factor leads to nonuniqueness in the symmetry factor for a particular order of kinetics (b) and causes an error of the order of 5% in the determination of b and an error of the order of 10% in the determination of activation energy (E). PACS No.: 78.60Kn

APPLICATION OF CVD DIAMOND FILMS FOR UV THERMOLUMINESCENCE DOSIMETER

2002 ◽  
Vol 16 (06n07) ◽  
pp. 1003-1007 ◽  
Author(s):  
J. AHN ◽  
B. GAN ◽  
Q. ZHANG ◽  
S. F. YOON ◽  
V. LIGATCHEV ◽  
...  
Keyword(s):  
Activation Energy ◽  
Glow Curve ◽  
Diamond Films ◽  
Frequency Factor ◽  
Cvd Diamond ◽  
Order Kinetic ◽  
First Order ◽  
Order Kinetic Model ◽  
Ionizing Radiations ◽  
Trap Activation

This study presents the investigation of CVD diamond for the application of an UV TL dosimeter. A 9-μm-thick film used in this study presents a TL glow curve with a well-defined first-order kinetic peak (at about 273 K), which norm ally presents in the glow curve from ionizing radiations, is not observed. By fitting the glow curve to a first-order kinetic model, the trap activation energy E t = 0.95 eV and frequency factor s = 5.6 x 106 s -1 have been resolved.

FADING CORRECTION OF NaCl(I) TLD

2006 ◽  
Vol 20 (09) ◽  
pp. 1077-1086
Author(s):  
B. ARUNKUMAR SHARMA ◽  
R. K. GARTIA ◽  
S. NABADWIP SINGH
Keyword(s):  
Activation Energy ◽  
Theoretical Prediction ◽  
Glow Curve ◽  
Thermal Activation ◽  
Room Temperature ◽  
Storage Period ◽  
Frequency Factor ◽  
Data Acquisition System ◽  
Thermal Activation Energy ◽  
State Of Art

The prediction of fading for the glow peaks relevant to dosimetry of iodised salt has been made using the values of the trapping parameters, namely the thermal activation energy (E), frequency factor (s) and the order of kinetic (b). This theoretical prediction has been checked with experimentally observed glow curves recorded after storage period of 2, 5, 10, 165, 375 and 790 days at room temperature (~21°C). Excellent agreement has been observed between the experimental and theoretical glow curves. This has been possible because of reliable retrieval of the trapping parameters by the use of Computerised Glow Curve Deconvolution (CGCD) as well as state-of-art of data acquisition system. The concept developed in the present paper in principle may be applied to any TLD.

Thermoluminescence Glow Curve Analysis of Mn4+-Doped Barium Yttrium Oxide Phosphor

2021 ◽  
pp. 211-214
Author(s):  
Vikram Awate ◽  
Lokeshwar Patel ◽  
Rashmi Sharma ◽  
A. K. Beliya ◽  
Ratnesh Tiwari ◽  
...  
Keyword(s):  
Yttrium Oxide ◽  
Glow Curve ◽  
Curve Analysis ◽  
Thermoluminescence Glow Curve ◽  
Barium Yttrium
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