TL glow curve shape and response of LiF:Mg,Cu,Si—Effect of heating rate

Pradhan, A.S.; Lee, J.I.; Kim, J.L.; Chung, K.S.; Choe, H.S.; Lim, Kyo‐Sun Sunny

doi:10.1016/j.radmeas.2007.10.016

Cited by 18 publications

(5 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The same specimens were used to take the measurements repeatedly, and after the end of each measurement, the amount of the stimulant light was set to its maximum and irradiated for 100 seconds to initiate the specimen. Next, RL/ TL was measured as same manner for the LiF:Mg, Cu, Si (diameter, 4.5 mm; thickness, 0.8 mm; and mass, 30 mg) developed by the Korea Atomic Energy Research Institute [8,9]. The same specimen was repeatedly used, and after the end of each measurement, the specimen was initiated at 260°C in an electric furnace for the next measurement.…”

Section: Resultsmentioning

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

Section: Resultsmentioning

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

show abstract

“…Meanwhile Luo et al [9] reported that peaks 3+4 in LiF:Mg,Cu,P remain almost unchanged at 90% of the total integral. Recently Pradhan et al [10] reported that in LiF:Mg,Cu,Si the main glow peak did not exhibit any significant reduction with increasing heating rate in the range from 1 to 30 K/s. In the present work, TL glow curves were measured with heating rates in the range from 1 K/s to 30 K/s.…”

Section: Iii2 Effect Of Heating Rate On Tl Glow-peaksmentioning

confidence: 97%

“…In the figure 3(a) the results obtained for LiF:Mg,Cu,Si [10] are shown for comparison. The increase of the integral TL with increasing heating rate can be explained by the defect interaction model during TL read-out suggested by Piters and Bos [31].…”

Section: Iii2 Effect Of Heating Rate On Tl Glow-peaksmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Heating Rate on the Responses of LiF: Mg, Cu, Na, Si Thermoluminescent Phosphor

Ha¹,

Hai²,

Long³

2011

Comm. in Phys.

View full text Add to dashboard Cite

Abstract. In the current work the glow curves for LiF:Mg,Cu,Na,Si thermoluminescent material were measured and analyzed by using a function approximating to the well-known Randall-Wilkins first-order expression. The influence of different heating rates on thermoluminescent glow-peak maximum temperature, peak height and integrated area of the glow peak was investigated for LiF:Mg,Cu,Na,Si phosphor. The results show that the glow-peak temperature, peak height and glow peak area increase with increasing heating rate, while the full width at half maximum of glow peak almost keeps constant in the range of heating rates studied.

show abstract

“…A qualidade desses ajustes é verificada pelo parâmetro figure of merit (FOM). De acordo com a literatura [32][33][34][35], o parâmetro FOM é considerado bom quando menor do que 5%.…”

Section: Materiais E Métodosunclassified

Investigação da termoluminescência de alexandrita (BeAl2O4:Cr3+)

et al. 2020

View full text Add to dashboard Cite

A alexandrita natural (BeAl2O4:Cr3+) é um mineral amplamente encontrado no Brasil e tem sido investigada para atuar como um detector de radiação ionizante (dosímetro) com o uso da técnica da termoluminescência (TL). A utilização de materiais naturais na área, é interessante pelo seu menor custo comparado aos sintéticos, além da possibilidade de atuarem na dosimetria retrospectiva. Diferentes características das curvas TL de sete amostras foram investigadas, como a linearidade, homogeneidade, repetibilidade e fading. As amostras foram irradiadas com doses entre 0,5 – 5 Gy, utilizando uma fonte beta de 90Sr/90Y. Os resultados demonstram que a curva TL segue o mecanismo cinético de primeira ordem, além de possuir uma dose-resposta linear, boa repetibilidade e estabilidade do sinal em temperatura ambiente para até 33 dias de armazenamento após a dose. O ajuste também revelou cinco picos nas temperaturas 355, 405, 445, 530 e 585 K (taxa de aquecimento de 1 K/s). A caracterização química constatou que as amostras utilizadas são predominantemente formadas por alexandrita com uma porção significativa de fases apatita. Em geral, os resultados trazem características desejáveis dos materiais dosimétricos, sugerindo que a alexandrita tem potencial de aplicação na área.

show abstract

TL glow curve shape and response of LiF:Mg,Cu,Si—Effect of heating rate

Cited by 18 publications

References 5 publications

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

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

Effect of Heating Rate on the Responses of LiF: Mg, Cu, Na, Si Thermoluminescent Phosphor

Investigação da termoluminescência de alexandrita (BeAl2O4:Cr3+)

Contact Info

Product

Resources

About