A computer program for the deconvolution of the thermoluminescence glow curves by employing the interactive trap model

Chung, K.S.; Lee, J.I.; Kim, J.L.

doi:10.1016/j.radmeas.2012.03.026

Cited by 33 publications

(10 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Interestingly, Nazarov et al reported oxygen defects related TL peak at 325 K for Eu 2+ doped SrAl 2 O 4 (1 mol%) [39]. To further estimate the trap depths in undoped SrAl 2 O 4 , a deconvolution of the TL glow curve with general order kinetics is carried out using a computer program given by Chung et al [45]. Unfortunately, it is found that this TL glow curve cannot be described satisfactorily by using the general order kinetics to model the traps in undoped SrAl 2 O 4 .…”

Section: Tl Glow Curve Of Undoped Sral 2 Omentioning

confidence: 99%

Green Afterglow of Undoped SrAl2O4

Zhai

Huang

2021

Nanomaterials

View full text Add to dashboard Cite

Undoped SrAl2O4 nanocrystals were obtained via solution combustion using urea as fuel. The afterglow properties of undoped SrAl2O4 were investigated. Green afterglow from undoped SrAl2O4 is visible to the human eye when the 325 nm irradiation of a helium–cadmium laser (13 mW) is ceased. The afterglow spectrum of undoped SrAl2O4 is peaked at about 520 nm. From the peak temperature (321 K) of the broad thermoluminescence glow curve, the trap depth of trap levels in undoped SrAl2O4 is estimated to be 0.642 eV using Urbach’s formula. Based on first-principles density functional calculations, the bandstructures and densities of states are derived for oxygen-deficient SrAl2O4 and strontium-deficient SrAl2O4, respectively. Our results demonstrate that the green afterglow of undoped SrAl2O4 originates from the midgap states introduced by oxygen and strontium vacancies. The observation of green afterglow from undoped SrAl2O4 helps in gaining new insight in exploring the afterglow mechanisms of SrAl2O4-based afterglow materials.

show abstract

Section: Tl Glow Curve Of Undoped Sral 2 Omentioning

confidence: 99%

Green Afterglow of Undoped SrAl2O4

Zhai

Huang

2021

Nanomaterials

View full text Add to dashboard Cite

show abstract

“…The TL curve based on the general order function is given by the following equation:where I is the TL intensity at temperature T , s is the pre-exponential factor with the unit of s −1 , n 0 is the concentration of trapped charges at time t = 0, E is the trap depth, k is the Boltzmann constant, b is the order of kinetics, and β is the heating rate. In order to determine the kinetic parameters of the multiple traps, computerized glow curve deconvolution of the TL glow curves is carried out with general order kinetics using a computer program given by Chung et al 44 Fig. 12 depicts the computerized glow curve deconvolution of the TL glow curve of CaAl 2 O 4 :Dy 3+ at the doping concentration of 0.8 mol%.…”

Section: Resultsmentioning

confidence: 99%

Photoluminescence and afterglow of Dy³⁺ doped CaAl₂O₄ derived via sol–gel combustion

Chen

Zhai

2022

RSC Adv.

View full text Add to dashboard Cite

show abstract

“…ty as the temperature increase rate rises. These luminescence curves measured can be used to analyze the properties related to the radiation, thermal and optical stimulation characteristics of the trapping level and recombination center (RC) using LumiAnal 2016 glow curves measured as such can be used to [10].…”

Section: Jrprmentioning

confidence: 99%

An Integrated System for Radioluminescence, Thermoluminescence and Optically Stimulated Luminescence Measurements

Park

Chung

et al. 2018

J Radiat Prot Res

View full text Add to dashboard Cite

Background: This study aims to develop an integrated optical system that can simultaneously or selectively measure the signals obtained from radioluminescence (RL), thermoluminescence (TL), and optically stimulated luminescence (OSL), which are luminescence phenomena of materials stimulated by radioactivity, heat, and light, respectively. The luminescence mechanism of various materials could be investigated using the glow curves of the luminescence materials. Materials and Methods: RL/TL/OSL integrated measuring system was equipped with a X-ray tube (50 kV, 200 μA) as an ionizing radiation source to irradiate the sample. The sample substrate was used as a heating source and was also designed to optically stimulate the sample material using various light sources, such as high luminous blue light emitting diode (LED) or laser. The system measured the luminescence intensity versus the amount of irradiation/stimulation on the sample for the purpose of measuring RL, TL and OSL sequentially or by selectively combining them. Optical filters were combined to minimize the interference of the stimulation light in the OSL signal. A long-pass filter (420 nm) was used for 470 nm LED, an ultraviolet-pass filter (260-390 nm) was used for detecting the luminescence of the sample by PM tube. Results and Discussion: The reliability of the system was evaluated using the RL/OSL characteristics of Al2O3:C and the RL/TL characteristics of LiF:Mg,Cu,Si, which were used as dosimetry materials. The RL/OSL characteristics of Al2O3:C showed relatively linear dose-response characteristics. The glow curve of LiF:Mg,Cu,Si also showed typical RL/OSL characteristics. Conclusion: The reliability of the proposed system was verified by sequentially measuring the RL characteristics of radiation as well as the TL and OSL characteristics by concurrent thermal and optical stimulations. In this study, we developed an integrated measurement system that measures the glow curves of RL/TL/OSL using universal USB-DAQs and the control program.

show abstract

A computer program for the deconvolution of the thermoluminescence glow curves by employing the interactive trap model

Cited by 33 publications

References 8 publications

Green Afterglow of Undoped SrAl2O4

Green Afterglow of Undoped SrAl2O4

Photoluminescence and afterglow of Dy³⁺ doped CaAl₂O₄ derived via sol–gel combustion

An Integrated System for Radioluminescence, Thermoluminescence and Optically Stimulated Luminescence Measurements

Contact Info

Product

Resources

About

A computer program for the deconvolution of the thermoluminescence glow curves by employing the interactive trap model

Cited by 33 publications

References 8 publications

Green Afterglow of Undoped SrAl2O4

Green Afterglow of Undoped SrAl2O4

Photoluminescence and afterglow of Dy3+ doped CaAl2O4 derived via sol–gel combustion

An Integrated System for Radioluminescence, Thermoluminescence and Optically Stimulated Luminescence Measurements

Contact Info

Product

Resources

About

Photoluminescence and afterglow of Dy³⁺ doped CaAl₂O₄ derived via sol–gel combustion