Radio-photoluminescence properties of samarium-doped alkaline earth sulfates

Okada, Go; Hirasawa, Kazuki; Kusano, Eiji; Yanagida, Takayuki; Nanto, Hidehito

doi:10.1016/j.nimb.2020.01.020

Cited by 18 publications

(8 citation statements)

References 25 publications

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“…Using the present system, the temperature dependence, heat-treatment effect, and photobleaching effect (23) can be measured, which were previously demonstrated on several different RPL materials. (24)(25)(26) In particular, characterization of the temperature dependence is very important for RPL materials as it often shows so-called "build-up" of the signal, which is dependent on the post-irradiation temperature of the material.…”

Section: Methodsmentioning

confidence: 99%

TSL/OSL/RPL Automated and Integrated Measurement System (TORAIMS)

Okada¹,

Hirasawa²,

Yanagida³

et al. 2021

Sensors and Materials

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Thermally stimulated luminescence (TSL), optically stimulated luminescence (OSL), and radio-photoluminescence (RPL) are radiation-induced luminescence phenomena, and they are widely used for radiation dosimetry today. Despite their successful applications, the R&D of conventional and new phosphor materials is still actively performed in a wide range of research fields from basic science to application. Although these phenomena are considered to be different, they share common physical processes such as the generation, trapping, and transfer of electronic charges. In order to have a deeper look into these phenomena, it is important to comprehensively characterize those of a single material. For this, we have constructed a prototype TSL/OSL/RPL automated and integrated measurement system (TORAIMS), and then the system performance has been studied. The system offers automated and integrated measurement of several different TSL, OSL, and RPL properties, and it is also designed to cover many different phosphor materials having a wide variety of spectroscopic properties.

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Section: Methodsmentioning

confidence: 99%

TSL/OSL/RPL Automated and Integrated Measurement System (TORAIMS)

Okada¹,

Hirasawa²,

Yanagida³

et al. 2021

Sensors and Materials

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“…The inset shows ABS25 (top) and ABS30 (bottom) before (left) and after (right) X-ray irradiation, respectively [67] Okada 等 [34] 在 2017 [72][73] 。 Okada 等 [35]…”

Section: Cu 离子掺杂 Rpl 材料mentioning

confidence: 99%

“…Fig. 4 RPL responses, reusability and effectiveness of RPL in relation to band gap energy of host in Sm-doped materials (a) Linear response curve of RPL intensity and radiation dose of Sm-doped BaF2-Al2O3-B2O3 [34] ; (b) Dose response curves of Sm-doped CaSO4, SrSO4, BaSO4 and commercial RPL glass dosimeter (Ag-PG) [35] ; (c) Stability curve of RPL signal doped with CaSO4, SrSO4 and BaSO4 during UV excitation. The measured irradiation dose of each group was fixed at 5.0 Gy, and PL spectrum was measured every minute after irradiation (20 times in total) to obtain its response value [35] ; Reusability of Sm-doped RPL detectors after (d) heat treatment and (e) UV irradiation erasure [7] ; (f) Effectiveness of RPL in Sm-doped RPL materials as a function of band gap energy of host [74] 2.6 其他材料除上述几种体系外，许多新型 RPL 材料也陆续被发现。例如，氮掺杂碳(C:N)以碳作为基质且生物剂量当量非常高，在人体剂量监测中引起了高度关注 [41] 。C:N 在与电离辐射相互作用时会在基质中产生晶格空位，经高温热处理后，空位会发生迁移，在迁移的过程中被掺杂的氮原子捕获，形成氮空位 (Nitrogen vacancy, NV)中心。NV 中心是一种基于置换氮和相邻空位的发光点缺陷，能够被 450~600 nm 激发，在 600~800 nm 的范围内发出红光。Onoda 等 [41] 将金刚石中的 NV 中心用于荧光核轨迹探测器。无掺杂型体系 RPL 材料( 如：Li2CO3 [46] 、 K2CO3 [47] 、MgF2 [43] 、CaSO4 [48] 等)也是近些年研究的重点之一 [75][76] 。和上述的掺杂型材料不同，由于没有掺杂杂质离子，无掺杂型材料的发光机理仍待探究。 Nakamura 等 [46] 通过真空烧结技术制备出无掺杂的 Li2CO3，并观察到 RPL 现象。图 5(a)显示了 Li2CO3 在 X 射线(10 mGy)辐照前后的发射谱，发射峰位于 470 nm，随着 X 射线的辐照，发射峰的强度增加。插图比较了 X 射线(1 Gy)辐照前后的激发谱，可以…”

Section: Cu 离子掺杂 Rpl 材料unclassified

Research Progress of Radio-photoluminescence Materials and Their Applications

LI¹,

LI²,

LI³

et al. 2023

Journal of Inorganic Materials

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With the progress of nuclear radiation technology in China, radiation detection has been developed rapidly in recent years, which is widely used in radiation safety monitoring, radioactive medicine diagnosis and treatment, X-ray security inspection system, industrial non-destructive detection, microscopic particle track detection and many other fields. As a new radiation detection method, radio-photoluminescence (RPL) is a phenomenon in which a new luminescence center is generated inside a material under the ionizing radiation and is excited by ultraviolet light to emit light. RPL materials usually have the characteristics of storing radiation information, almost no attenuation of information, good linear dose response, high radiation 无机材料学报 sensitivity, low energy dependence and repeatable reading, which make up for the shortcomings of optically stimulated luminescence (OSL) materials and thermally stimulated luminescence (TSL) materials in storage stability and reusability. Since the RPL phenomenon was reported, RPL materials have emerged one after another, from the traditional materials as Ag-doped phosphate glass, Al2O3:C,Mg and LiF, to the novel materials as Cu-doped RPL system, Sm-doped RPL system and undoped RPL system materials, et al. Meanwhile, the applications of RPL materials have also been explored. RPL materials have become one of the indispensable materials in the field of radiation detection. Based on this, this paper summarizes the latest development of RPL materials, focuses on the luminescence principle, performance characteristics and applications of traditional & novel RPL materials. It especially compares the performance of different RPL materials in radiation detection. Finally, the advantages and disadvantages of RPL materials are summarized and analyzed. And also the development trend of RPL materials is prospected.

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“…(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. Given this background, we have been developing flexible dosimeters made of powdered RPL materials dispersed in resin.…”

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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Radio-photoluminescence properties of samarium-doped alkaline earth sulfates

Cited by 18 publications

References 25 publications

TSL/OSL/RPL Automated and Integrated Measurement System (TORAIMS)

TSL/OSL/RPL Automated and Integrated Measurement System (TORAIMS)

Research Progress of Radio-photoluminescence Materials and Their Applications

Radiophotoluminescence Imaging Reader for Passive Dosimetry

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