LiF Dosimetry Based on Radiophotoluminescence (RPL)

Levita, Moshe; Schlesinger, T.; Friedland, Stephen S.

doi:10.1109/tns.1976.4328325

Cited by 37 publications

(14 citation statements)

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“…These properties allow a highly reliable dose measurement, particularly because it allows a signal readout multiple times, which effectively reduces statistical measurement uncertainties and is a distinct advantage over other related techniques using, for example, thermally stimulated luminescence (TSL), (3)(4)(5) optically stimulated luminescence (OSL), (6) and scintillation. (7) Examples of existing phosphor materials that exhibit RPL are Ag-doped phosphate glass (Ag-PG), (8)(9)(10) C and Mg codoped aluminum oxide (Al 2 O 3 :C,Mg), (11,12) lithium fluoride (LiF), (13,14) and Sm-doped inorganic compound phosphors such as SrBPO 5 , (15) LiCaAlF 6 , (16) KBr, (17) CsBr, (18) MgF 2 , (19) CaF 2 , (20) BaAlBO 3 F 2 , (21) and AESO 4 (AE = Ca, Sr, Ba). (22) However, all of them are bulk solid phosphor materials and are not suitable for continuous dose distribution measurement (e.g., protective clothing and gloves) in curved areas.…”

Section: Introductionmentioning

confidence: 99%

Radiophotoluminescence Imaging Reader for Passive Dosimetry

Nanto¹,

Okada²,

Hirasawa³

et al. 2022

Sensors and Materials

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In this study, we constructed an image reader system for two-dimensional radiation dosimetry based on radiophotoluminescence (RPL). The reader system mainly consists of a Peltier-cooled CMOS camera and an LED excitation source, as well as control units, and it offers an arbitrary excitation wavelength (e.g., 365, 405, 460, 530, and 630 nm) and a wide spectral detection range (200-1000 nm) to be used for a wide range of prototype image detectors having different spectral features. Using the developed system, we were able to successfully obtain X-ray projection images recorded on a commercial RPL detector [Ag-doped phosphate glass (Ag-PG) plate] as well as custom-made prototypes of flexible imaging plates (IPs). Furthermore, the reader system is applicable not only for RPL imaging but also for conventional optically stimulated luminescence (OSL) imaging, which was demonstrated by using a commercial IP for medical diagnosis.

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Section: Introductionmentioning

confidence: 99%

Radiophotoluminescence Imaging Reader for Passive Dosimetry

Nanto¹,

Okada²,

Hirasawa³

et al. 2022

Sensors and Materials

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“…Thus, the RPL intensity can be repeatably read out, making it advantageous over TSL and OSL. (4) Phosphors exhibiting RPL include Ag-doped phosphate glasses, (5) Cu-doped glass, (6,7) Al 2 O 3 :C,Mg, (8) Eu-doped materials, (9,10) Sm-doped materials, (11,12) Yb-doped NaCl, (13) and LiF, (14,15) MgF 2 , (16) CaF 2 , (17,18) Mg 2 SiO 4 , (19) CaSO 4 , (20) K 2 CO 3 , (21) and Na 2 CO 3 . (22) The phosphors exhibiting RPL of greatest interest are currently Ag-doped phosphate glasses.…”

Section: Introductionmentioning

confidence: 99%

Ag Concentration Dependence of Build-up Effect of Radio-photoluminescence in Ag-doped P2O5–Al2O3–Na2O–SiO2 Glasses

Kato¹,

Shiratori²,

Iwao³

et al. 2021

Sensors and Materials

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In this paper, we evaluated the Ag concentration dependence of the build-up effect of radiophotoluminescence (RPL) in Ag-doped P 2 O 5 -Al 2 O 3 -Na 2 O-SiO 2 (PANS) glasses. After X-ray irradiation, the Ag-doped PANS glasses showed two emission peaks at around 460 and 630 nm, assigned to blue and orange RPL components, respectively. The build-up curves of the orange RPL component had two components corresponding to the formation of the + 2 Ag dimer and Ag 2+ ions. The intensity of the component due to the + 2Ag dimer increased with increasing Ag concentration, whereas that of the component due to Ag 2+ ions decreased. It is assumed that at a high Ag concentration, the Ag + ions have a higher probability of diffusing to Ag 0 sites to form the + 2 Ag dimer because the average distance between neighboring Ag atoms in the glass structure decreases with increasing Ag concentration. Therefore, the intensity of the component due to the + 2 Ag dimer was dominant at a high concentration of Ag in the glass structure.

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“…There are three representative RPL materials: Ag-doped sodium aluminophosphate (SAP) glass, 5) Al 2 O 3 :C,Mg, 6) and LiF. 7) The Ag-doped SAP glass is probably the most successful RPL material in industry since it has found an application in personnel routine dosimetry, which has been commercialized by Chiyoda Technol Corp. since 2000, and it is still used in Japan and worldwide today. 8) The RPL phenomenon is understood to be due to the valence change of doped Ag ion as the Ag + ion can capture both an electron and a hole and then convert to Ag 0 and Ag 2+ states, respectively, although the detailed process is still controversial.…”

Section: Introductionmentioning

confidence: 99%

Novel radio-photoluminescence materials and applications

Okada

2021

J. Ceram. Soc. Japan

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Radio-photoluminescence (RPL) is a phenomenon whereby a new luminescent centre is generated in a material by the interaction of an ionizing radiation with the medium. Despite the usefulness of RPL, e.g. in radiation measurements, there are only a limited number of RPL materials available today, which limits our understanding of the phenomenon as well as extending its use for new applications. In recent investigations, a large number of new RPL material systems have been proposed for radiation measurements. In particular, Sm-based RPL is one of the most intensively studied alternative systems, which shows RPL properties owing to the intravalence reduction of the Sm ion (Sm 3+ ¼ Sm 2+ ) induced by ionizing radiation. The generated Sm 2+ , as well as Sm 3+ , acts as a luminescent centre and shows photoluminescence, typically around 700 nm. This approach has enabled us to explore a wider range of material choices and to find a new application of RPL. An example is microbeam radiation therapy (MRT), which requires the measurement of extremely large radiation dose distributions at a microscopic scale. Such a new class of RPL is not only limited to Sm-based materials but also to those doped with other rare earth ions (e.g., Eu and Yb) and undoped materials.

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LiF Dosimetry Based on Radiophotoluminescence (RPL)

Cited by 37 publications

References 1 publication

Radiophotoluminescence Imaging Reader for Passive Dosimetry

Radiophotoluminescence Imaging Reader for Passive Dosimetry

Ag Concentration Dependence of Build-up Effect of Radio-photoluminescence in Ag-doped P2O5–Al2O3–Na2O–SiO2 Glasses

Novel radio-photoluminescence materials and applications

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