Radiophotoluminescence and thermoluminescence characteristics of undoped and Mg doped LiF phosphor in the high dose region

Gopal, J. Nandha; Sanyal, Bhaskar; Lakshmanan, A.

doi:10.1016/j.radmeas.2017.12.007

Cited by 24 publications

(21 citation statements)

References 25 publications

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“…These parameters are superior to those of Mg 2+ -doped LiF phosphor, which is the only existing RPL material used for highdose (kGy) recording. [13] In addition, SCU-200 can be quickly restored to its preirradiated state by heating at 60 8C for 12 h (Figure S21) through the acceleration of quenching of the photoinduced radicals. This endows SCU-200 with good reusability, another distinct merit for practical applications.…”

Section: Angewandte Chemiementioning

confidence: 99%

Emergence of a Radical‐Stabilizing Metal–Organic Framework as a Radio‐photoluminescence Dosimeter

et al. 2020

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Radio‐photoluminescence (RPL) materials display a distinct radiation‐induced permanent luminescence center, and therefore find application in the detection of ionizing radiation. The current inventory of RPL materials, which were discovered by serendipity, has been limited to a small number of metal‐ion‐doped inorganic materials. Here we document the RPL of a metal–organic framework (MOF) for the first time: X‐ray induced free radicals are accumulated on the organic linker and are subsequently stabilized in the conjugated fragment in the structure, while the metal center acts as the X‐ray attenuator. These radicals afford new emission features in both UV‐excited and X‐ray excited luminescence spectra, making it possible to establish linear relationships between the radiation dose and the normalized intensity of the new emission feature. The MOF‐based RPL materials exhibit advantages in terms of the dose detection range, reusability, emission stability, and energy threshold. Based on a comprehensive electronic structure and energy diagram study, the rational design and a substantial expansion of candidate RPL materials can be anticipated.

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Section: Angewandte Chemiementioning

confidence: 99%

Emergence of a Radical‐Stabilizing Metal–Organic Framework as a Radio‐photoluminescence Dosimeter

et al. 2020

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“…Extensive investigations have been performed to explore various materials exhibiting the RPL phenomena. It has been reported that not only Ag‐activated materials but also other substances including Al 2 O 3 :C, Mg crystals, Sm‐doped glasses and crystals, and non‐doped materials or materials without activators show RPL suitable for specific applications.…”

Section: Introductionmentioning

confidence: 99%

Radiophotoluminescence phenomenon in copper‐doped aluminoborosilicate glass

et al. 2018

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Radiophotoluminescence phenomena have been widely investigated on various types of materials for dosimetry applications. We report that an aluminoborosilicate glass containing 0.005 mol% copper exhibits intense photoluminescence in the visible region induced by X‐ray and γ‐ray irradiation. The luminescence is assigned to the 3d94s1 → 3d10 transition of Cu+. The proportionality of the intensity of the induced photoluminescence to the irradiation dose was confirmed up to 0.5 kGy using 60Co γ‐ray irradiation. Based on the spectroscopic results, a potential mechanism was proposed for the enhancement of the photoluminescence. The exposure to the ionizing radiation generates electron‐hole pairs in the glass, and the electrons are subsequently captured by the Cu2+ ions, which are converted to Cu+ and emit the luminescence. For the glass containing 0.01 mol% copper, the pronounced enhancement of the photoluminescence was not observed because the reverse reaction, ie, the capture of the holes by the Cu+ ions, becomes prominent. The photoluminescence induced by the irradiation was stably observed for the glasses kept at room temperature and even for the glasses heat‐treated at 150°C. However, the induced photoluminescence could be eliminated by the heat treatment at a temperature at 500°C, and the glass returned to the initial pre‐irradiation state. The Cu‐doped aluminoborosilicate glass is a potential candidate for use in dosimetry applications.

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“…3d , Th-SINAP-100 exhibits eight distinct PL colors in response to 1, 3, 5, 7, 10, 30, 50, and 80 kGy γ-ray irradiation, while the color remains unchanged when the dose is further increased to 100 kGy. The upper limit of radiation dose is approximately 80 kGy, which is higher than currently existing radio-photoluminescence dosimeters, e.g., Pb(2-MTA)·DMF (SCU-200) and LiF:Mg (TLD-100) 18 , 38 . The dose range of Th-SINAP-100 is comparable to commercialized radiochromic film dosimeter GEX B3 and among one the highest of all dosimeters 13 , 39 .…”

Section: Resultsmentioning

confidence: 85%

Visible colorimetric dosimetry of UV and ionizing radiations by a dual-module photochromic nanocluster

Xie

Wang

et al. 2021

Nat Commun

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Radiation dosimeters displaying conspicuous response of irradiance are highly desirable, owing to the growing demand of monitoring high-energy radiation and environmental exposure. Herein, we present a case of dosimetry based on a discrete nanocluster, [Th6(OH)4(O)4(H2O)6](TPC)8(HCOO)4∙4DMF∙H2O (Th-SINAP-100), by judiciously incorporating heavy Th6 polynuclear centers as radiation attenuator and organic linkers as photo-responsive sensor. Interestingly, dual-module photochromic transitions upon multiple external stimuli including UV, β-ray, and γ-ray are integrated into this single material. The striking color change, and more significantly, the visible color transition of luminescence in response to accumulating radiation dose allow an on-site quantitative platform for naked-eye detection of ionization radiations over a broad range (1–80 kGy). Single crystal X-ray diffraction and density functional theory calculations reveal that the dual-module photochromism can be attributed to the π(TPC) → π*(TPC) intermolecular charge transfer driven by enhanced π-π stacking interaction between the adjacent TPC moieties upon irradiation.

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Radiophotoluminescence and thermoluminescence characteristics of undoped and Mg doped LiF phosphor in the high dose region

Cited by 24 publications

References 25 publications

Emergence of a Radical‐Stabilizing Metal–Organic Framework as a Radio‐photoluminescence Dosimeter

Emergence of a Radical‐Stabilizing Metal–Organic Framework as a Radio‐photoluminescence Dosimeter

Radiophotoluminescence phenomenon in copper‐doped aluminoborosilicate glass

Visible colorimetric dosimetry of UV and ionizing radiations by a dual-module photochromic nanocluster

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