Optical and thermal pre-readout treatments to reduce the influence of fading on LiMgPO4 OSL measurements

Malthez, Anna Luiza Metidieri Cruz; Marczewska, B.; Kulig, D.; Bilski, P.; Kłosowski, M.

doi:10.1016/j.apradiso.2018.02.022

Cited by 16 publications

(5 citation statements)

References 9 publications

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“…De tec tor type LiF:Mg,Ti (TLD-100) 7 LiF:Mg,Ti (TLD-700) * in di cate post-ir ra di a tion an neal ing at 100 °C for 20 minutes RPL do sim e ter sys tems are in sen si tive to am bi ent temper a ture and hu mid ity and do not re quire any fad ing cor rec tion [7,25,28,35]. On the other hand, sim i larly to TLD, OSLD also ex hib its fad ing that could be nearly as much as 70 % af ter 30 days from the ir ra di ation [48], ma te rial de pend ent. This can be cor rected by op ti cal pre-read ing treat ment and min i mized to a few per cent.…”

Section: Ta Ble 4 Fad Ing Of Var I Ous Do Sim E Ters Pre Vi Ously Stored 24 Hours Af Ter Ir Ra Di a Tion (Adopted From [15])mentioning

confidence: 92%

Review of the thermoluminescent dosimetry method for the environmental dose monitoring

et al. 2021

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Passive solid state dosimeters, such as thermoluminescence dosimeters, provide integrated measurement of the total dose and are widely used in environmental monitoring programs. The objective of this paper is to provide a comprehensive review on the use of thermoluminescent dosimetry methods for monitoring radiation dose in the environment. The article presents the part of the research results of the project PREPAREDNESS (EMPIR 2016 call for Metrology for Environment joint research project) with a particular objective to harmonize procedures used by dosimetry services, relevant authorities and Institutes across the Europe. To achieve this, different monitoring routines that are based on passive environ mental dosimetry methods are investigated. Differences in performing specific steps such as preheating, reading, annealing, minimizing fading, and others, are analyzed. The investigation was performed by means of qualitative literature review that showed the lack of information about specific steps. The conclusion of this work is that thermoluminescent dosimetry measurement system has to be type-tested even though the testing procedure is complicated. In addition to this, control dosimeters should be introduced, International Organization for Standardization protocols should be followed during calibration, and finally, parameters influencing the measurement uncertainty have to be identified and well understood in order to pro duce ac cu rate dose measurement results.

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Section: Ta Ble 4 Fad Ing Of Var I Ous Do Sim E Ters Pre Vi Ously Stored 24 Hours Af Ter Ir Ra Di a Tion (Adopted From [15])mentioning

confidence: 92%

Review of the thermoluminescent dosimetry method for the environmental dose monitoring

et al. 2021

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“…Among mono‐phosphates, LiMPO 4 (M = Mg, Mn, Co, Ni) has gained attention due to its magnetoelectric properties 26–28 . As the LiMPO 4 structure, LiMgPO 4 with the orthorhombic crystal symmetry has been studied because of its dosimetry properties 29–32 . Keskin et al 33 .…”

Section: Introductionmentioning

confidence: 99%

“…[26][27][28] As the LiMPO 4 structure, LiMgPO 4 with the orthorhombic crystal symmetry has been studied because of its dosimetry properties. [29][30][31][32] Keskin et al 33 reported photoluminescence (PL), thermoluminescence, radioluminescence (RL), and cathodoluminescence (CL) properties of Tb 3+ , Dy 3+ -doped LiMgPO 4 , in which the RL and PL emissions of the 5 D 3 and 5 D 4 transitions of Tb 3+ have been strongly observed in LiMgPO 4 :Tb 3+ phosphor. The solidstate reaction [34][35][36] and sol-gel synthesis method 33 have been used in the fabrication of LiMgPO 4 .…”

Section: Introductionmentioning

confidence: 99%

Structural and tunable optical properties of LiMgPO₄:Tb³⁺ phosphor fabricated by sol–gel method

Katı

2024

Int J Applied Ceramic Tech

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In the study, Tb3+‐doped LiMgPO4 phosphors between .10 and 5 mol% were successfully synthesized by the sol–gel process. The crystal structure of Tb3+‐doped LiMgPO4 was identified by X‐ray diffraction (XRD), scanning electron microscopy (SEM), and X‐ray photoelectron spectroscopy (XPS) analyses. The XRD results for LiMgPO4 ceramics doped with Tb3+ indicated a single‐phase up to 5 mol%, accompanied by lattice shrinkage. An SEM analysis of LiMgPO4 samples showed that increasing Tb3+ concentration reduced grain size but did not cause any significant change in slightly angular and round grains. The emission intensity of phosphor increased from .10 to 5 mol%, and no concentration quenching was observed. The luminescence color of LiMgPO4:Tb3+ phosphor can be tuned from blue to green through cross‐relaxation with the increase in Tb3+ concentration. The photoluminescence emissions of LiMgPO4:Tb3+ on the CIE diagram shifted from blue to green as the Tb3+ concentration increased. The color purity of the 5 mol% Tb3+‐doped phosphor showing the strongest emission was measured at 22.71%, whereas the color‐correlated temperature parameter was found to be 5573 K. The phosphors exhibited bi‐exponential decay profiles, and the observed lifetimes of 5D3 decreased with the increase of Tb3+, where the cross‐relaxation effect increased. The quantum efficiency (ɳQE) of the phosphor was determined using the cross‐relaxation process. For Tb3+ concentrations ranging from .1 to 5 mol%, the ɳQE of the 5D3 state decreased from 62.49% to 28.29%. The research may offer a new perspective and new approaches for tuning luminescence in Tb3+‐doped phosphors.

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“…The dynamics of LMP in the form of powder, 30-34 crystals [35][36][37][38][39] and a thin foil was studied. 40,41 To further explore the TL and OSL properties of LMP, the luminescence kinetic parameters of undoped crystals were extensively studied. 42 Considerable research [43][44][45][46][47] has also been conducted on defects in prepared and irradiated lithium magnesium phosphate.…”

Section: Introductionmentioning

confidence: 99%

Dosimetric and spectroscopic study of LiMgPO₄ doped with Tm³⁺ and Er³⁺

et al. 2023

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Optical and thermal pre-readout treatments to reduce the influence of fading on LiMgPO4 OSL measurements

Cited by 16 publications

References 9 publications

Review of the thermoluminescent dosimetry method for the environmental dose monitoring

Review of the thermoluminescent dosimetry method for the environmental dose monitoring

Structural and tunable optical properties of LiMgPO₄:Tb³⁺ phosphor fabricated by sol–gel method

Dosimetric and spectroscopic study of LiMgPO₄ doped with Tm³⁺ and Er³⁺

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Optical and thermal pre-readout treatments to reduce the influence of fading on LiMgPO4 OSL measurements

Cited by 16 publications

References 9 publications

Review of the thermoluminescent dosimetry method for the environmental dose monitoring

Review of the thermoluminescent dosimetry method for the environmental dose monitoring

Structural and tunable optical properties of LiMgPO4:Tb3+ phosphor fabricated by sol–gel method

Dosimetric and spectroscopic study of LiMgPO4 doped with Tm3+ and Er3+

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Structural and tunable optical properties of LiMgPO₄:Tb³⁺ phosphor fabricated by sol–gel method

Dosimetric and spectroscopic study of LiMgPO₄ doped with Tm³⁺ and Er³⁺