Highly sensitive Europium doped SrSO4 OSL nanophosphor for radiation dosimetry applications

Patle, Anita; Patil, Rashmi S.; Kulkarni, M.S.; Bhatt, B. C.; Moharil, S. V.

doi:10.1016/j.optmat.2015.07.034

Cited by 30 publications

(4 citation statements)

References 38 publications

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“…This sample had a sublinear dose response up to about 100 mGy and then tended to become strongly sublinear, indicating that it is extraordinarily sensitive and, thus, appropriate for detecting very low dose levels. 79 As it is known that the absorption efficiency of the laser by NP is higher than that of larger grain-sized material. 80 Since the OSL reader is equipped with a blue LED laser source that is utilized for stimulation of very deep traps (VDTs), 81 this led to liberating more charge carriers from these luminescence traps in the NP.…”

Section: Enhancement Of Various Radiation Dosimetry Systems Using Nan...mentioning

confidence: 99%

Review of nanomaterial advances for ionizing radiation dosimetry

Aboelezz

Pogue

2023

Applied Physics Reviews

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There are a wide range of applications with ionizing radiation and a common theme throughout these is that accurate dosimetry is usually required, although many newer demands are provided by improved features in higher range, multi-spectral and particle type detected. Today, the array of dosimeters includes both offline and online tools, such as gel dosimeters, thermoluminescence (TL), scintillators, optically stimulated luminescence (OSL), radiochromic polymeric films, gels, ionization chambers, colorimetry, and electron spin resonance (ESR) measurement systems. Several future nanocomposite features and interpretation of their substantial behaviors are discussed that can lead to improvements in specific features, such as (1) lower sensitivity range, (2) less saturation at high range, (3) overall increased dynamic range, (4) superior linearity, (5) linear energy transfer and energy independence, (6) lower cost, (7) higher ease of use, and (8) improved tissue equivalence. Nanophase versions of TL and ESR dosimeters and scintillators each have potential for higher range of linearity, sometimes due to superior charge transfer to the trapping center. Both OSL and ESR detection of nanomaterials can have increased dose sensitivity because of their higher readout sensitivity with nanoscale sensing. New nanocrystalline scintillators, such as perovskite, have fundamentally important advantages in sensitivity and purposeful design for key new applications. Nanoparticle plasmon coupled sensors doped within a lower Zeff material have been an effective way to achieve enhanced sensitivity of many dosimetry systems while still achieving tissue equivalency. These nanomaterial processing techniques and unique combinations of them are key steps that lead to the advanced features. Each must be realized through industrial production and quality control with packaging into dosimetry systems that maximize stability and reproducibility. Ultimately, recommendations for future work in this field of radiation dosimetry were summarized throughout the review.

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Section: Enhancement Of Various Radiation Dosimetry Systems Using Nan...mentioning

confidence: 99%

Review of nanomaterial advances for ionizing radiation dosimetry

Aboelezz

Pogue

2023

Applied Physics Reviews

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“…Hitachi joined part of Aloka in 2007, associating itself in the production of technologies, which explains the absence of active patents of the latter [14]. Both Toshiba, Hitachi and Fujifilm, as clusters of companies, operate in various market segments and, with regard to dosimetry, file patents both related to medical imaging equipment and power generation in nuclear reactors, but neither all directly linked to exposure monitoring, but to system components [15][16][17][18][19].…”

Section: Figure 2: Leading Patent Holder Companies In Dosimetrymentioning

confidence: 99%

State-of-the-art techniques in radiation dosimetry – technological segments and applications

Batista

2021

Braz. J. Rad. Sci.

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This work presents a study based on patent filings as a resource for identifying technological trends in the field of radiation dosimetry for a view of the state-of-the- art techniques, in addition to the main actors involved and patent search process in the area of ionizing radiation. It aimed to make an analysis of patent portfolios to outline an application scenario for the knowledge developed in the area. It was carried out through consultation using the Questel Orbit search and analysis system having the word “dosimetry” and its similars, by semantic similarity, for the years between 1999-2019. The results are discussed regarding the main deposits, depositors, time evolution, technological segments and geographic coverage. They point out that companies that operate simultaneously in the area of energy power generation and medical applications have a significant contribution to the production of patents. Studies focused on the development of dosimetric systems move several technological segments, mainly environmental and medical technology.

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“…Therefore, we usually need to detect the dose of radiation received by people or objects in areas such as space travel, medical care and environmental moni toring. Several kinds of dosimeters have been explored such as thermo luminescent dosimeters (TLDs) [2], semiconductor diodes [3] and optically stimulated luminescence dosimeters (OSDLs) [4]. However, most of them are not suitable for working in space, as they do not meet the requirements of being of low weight and small size, as well as able to work following exposure to high doses.…”

Section: Introductionmentioning

confidence: 99%

A metal-oxide-semiconductor radiation dosimeter with a thick and defect-rich oxide layer

Liu¹,

Yang²,

Zhang³

2016

J. Micromech. Microeng.

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Enhancing the density of defects in the oxide layer is the main factor in improving the sensitivity of a metal-oxide-semiconductor (MOS) radiation dosimeter. This paper reports a novel MOS dosimeter with a very thick and defect-rich oxide layer fabricated by MEMS technology. The category of defects in SiO2 and their possible effect on the radiation dose sensing was analyzed. Then, we proposed combining deep-reactive-ion etching, thermal oxidation and low pressure chemical vapor deposition to realize an oxide layer containing multiple and large interfaces which can increase defects significantly. The trench-and-beam structure of silicon was considered in detail. The fabrication process was developed for obtaining a thick and compact MEMS-made SiO2. Our devices were irradiated by γ-rays of 60Co at 2 Gy per minute for 2 h and a thermally stimulated current (TSC) method was used to determine the readout of the dosimeters. Results show that there is a peak current of about 450 nA, indicating a total TSC charge of 158 μC and sensitivity of 1.1 μC mm−3·Gy, which is 40 times the sensitivity of previous MOS dosimeters.

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Highly sensitive Europium doped SrSO4 OSL nanophosphor for radiation dosimetry applications

Cited by 30 publications

References 38 publications

Review of nanomaterial advances for ionizing radiation dosimetry

Review of nanomaterial advances for ionizing radiation dosimetry

State-of-the-art techniques in radiation dosimetry – technological segments and applications

A metal-oxide-semiconductor radiation dosimeter with a thick and defect-rich oxide layer

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