Optically stimulated luminescence in x-ray irradiated xSnO–(25−x)SrO–75B2O3 glass

Nanto, Hidehito; Nakagawa, Ryota; Takei, Yoshinori; Hirasawa, Kazuki; Miyamoto, Yuka; Masai, Hirokazu; Kurobori, Toshio; Yanagida, Takayuki; Fujimoto, Yutaka

doi:10.1016/j.nima.2014.12.033

Cited by 12 publications

(6 citation statements)

References 3 publications

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“…and Zn 3 (PO 4 ) 2 -NaPO 3 glasses have been studied. (18)(19)(20)(21)(22)(23)(24)(25) It is confirmed that these glasses show scintillation, TL, and OSL. In particular, the Sn-doped ZnO-P 2 O 5 and Zn 3 (PO 4 ) 2 -NaPO 3 glasses show good properties; thus, the scintillation and dosimetric properties of other Sndoped ZnO-based glasses are our recent interest.…”

Section: Introductionmentioning

confidence: 73%

Scintillation and Dosimetric Properties of Sn-doped ZnO-SiO2-B2O3 Glasses

Kawaguchi¹,

Yanagida²

2019

Sensors and Materials

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We have studied the scintillation and dosimetric properties of Sn-doped ZnO-SiO 2-B 2 O 3 glasses. The glass samples were obtained by a conventional melt quenching method. In the scintillation spectra of the Sn-doped ZnO-SiO 2-B 2 O 3 glasses, emission peaks due to the 5p → 5s transition of Sn 2+ ions were observed. Scintillation decay times of the Sn-doped ZnO-SiO 2-B 2 O 3 glasses were from 2.44 to 2.95 μs. In the thermoluminescence (TL) glow curves of the Sn-doped ZnO-SiO 2-B 2 O 3 glasses, we observed broad glow peaks at 200 °C. From the doseresponse curve, the lower limit of detection for the 0.1% Sn-doped sample was 0.1 mGy.

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Section: Introductionmentioning

confidence: 73%

Scintillation and Dosimetric Properties of Sn-doped ZnO-SiO2-B2O3 Glasses

Kawaguchi¹,

Yanagida²

2019

Sensors and Materials

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“…On the other hand, another reason for the low conversion efficiency is the storage mechanism of irradiated energy proposed by Yanagida 34 . It was reported that a B 2 O 3 -containing glass exhibits storage luminescence by X-ray irradiation 35 . Because the irradiated energy is converted into scintillation, storage luminescence, or thermal vibration (non-radiative relaxation), high storage luminescence means low scintillation.…”

Section: Discussionmentioning

confidence: 99%

“…Although most phosphors possess the ability to convert light 1–35 , some phosphors emit light as a result of mechanical stress 36,37 . Conventional phosphors are classified into two types: phosphors excited by UV or visible light 2–26 and phosphors excited by ionizing radiation 21–35 . For the latter, the photon energy is far beyond the band gap of materials and radiation-induced luminescence is brought about by energy transfer from the host matrix to activators 38–41 .…”

Section: Introductionmentioning

confidence: 99%

X-ray-induced Scintillation Governed by Energy Transfer Process in Glasses

Masai

Okada

Torimoto

et al. 2018

Sci Rep

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The efficiency of X-ray-induced scintillation in glasses roughly depends on both the effective atomic number Zeff and the photoluminescence quantum efficiency Qeff of glass, which are useful tools for searching high-performance phosphors. Here, we demonstrate that the energy transfer from host to activators is also an important factor for attaining high scintillation efficiency in Ce-doped oxide glasses. The scintillation intensity of glasses with coexisting fractions of Ce3+ and Ce4+ species is found to be higher than that of a pure-Ce3+-containing glass with a lower Zeff value. Values of total attenuation of each sample indicate that there is a non-linear correlation between the scintillation intensity and the product of total attenuation and Qeff. The obtained results illustrate the difficulty in understanding the luminescence induced by ionizing radiation, including the energy absorption and subsequent energy transfer. Our findings may provide a new approach for synthesizing novel scintillators by tailoring the local structure.

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“…Em geral, as pesquisas com vidros dosimétricos concentraram-se em medir altas doses de radiação (ordem de Gy até alguns kGy) usando TL ou OSL [50][51][52][53][54] . A OSL observada em alguns vidros de borato 55 abriu novas possibilidades para dosimetria de radiação com ênfase particular na monitoração da dose em tempo real em procedimentos médicos [56][57][58][59][60][61][62] . Sensores de fibra óptica podem ser localizados em áreas perigosas de radiação para monitoramento remoto e para alcançar locais de difícil acesso.…”

Section: Dosimetria Luminescente Pessoalunclassified

Novos Materiais Dosimétricos para Aplicações em Física Médica

Souza¹,

Souza²,

Baffa

et al. 2019

Rev Bras Fis Med

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24 IntroduçãoDosimetria é a determinação da exposição ou da dose de radiação em um ponto de um meio específico, que pode ser o ambiente ou o corpo de um indivíduo. Embora a dosimetria de radiação ionizante seja uma atividade presente em áreas diversas, incluindo saúde, indústria, aviação, por exemplo, é na área da saúde que os procedimentos dosimétricos são mais disseminados, porque o princípio ALARA deve ser sempre praticado.Pesquisas sobre novos materiais e metodologias para emprego em procedimentos dosimétricos estão em franco desenvolvimento. No Brasil, vários grupos de pesquisa têm contribuído para o desenvolvimento de materiais dosimétricos e metodologias para uso desses Novos materiais dosimétricos para aplicações em física médica Resumo Este artigo apresenta o estado da arte dos materiais dosimétricos para aplicações em dosimetria pessoal e clínica. O objetivo é fornecer uma visão geral das vantagens e limitações dos dosímetros comerciais disponíveis mais usados, bem como novos materiais estudados na atualidade. Resumimos trabalhos recentes publicados sobre materiais cristalinos e vítreos mais discutidos e com melhores perspectivas para uso prático em dosimetria por Termoluminescência (TL), Luminescência Opticamente Estimulada (OSL), Radiofotoluminescência (RPL) e Ressonância de Spin Eletrônico (ESR), e ainda géis, dosímetros plásticos e emulsões superaquecidas. São tratadas novas formas de uso desses materiais, como fibras para dosimetria ativa, filmes dosimétricos para dosimetria 2D, e materiais que possam ser usados em dosimetria tridimensional. Os trabalhos atuais demonstram uma clara tendência da opção do uso cada vez maior de optoeletrônica para obtenção dos sinais e sua leitura. Palavras-chave: materiais dosimétricos; dosímetros; dosimetria pessoal; dosimetria clínica. AbstractThis paper presents the state-of-the-art of dosimetric materials for personal and clinical dosimetry applications. The objective is to provide an overview of the advantages and limitations of the most commonly used commercial dosimeters, as well as new materials currently studied. We summarize recent work published on crystalline and vitreous materials more discussed and with better perspectives for practical use in dosimetry by Thermoluminescence (TL), Optically Stimulated Luminescence (OSL), Radiophotoluminescence (RPL), and Electron Spin Resonance (ESR), as well as gels, plastic dosimeters, and superheated emulsions. New forms of use of these materials are treated, such as fibers for active dosimetry, dosimetric films for 2D dosimetry, and materials that can be used in three-dimensional dosimetry. Current works demonstrate a clear tendency of the option of the increasing use of optoelectronics to obtain the signals and read them.

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Optically stimulated luminescence in x-ray irradiated xSnO–(25−x)SrO–75B2O3 glass

Cited by 12 publications

References 3 publications

Scintillation and Dosimetric Properties of Sn-doped ZnO-SiO2-B2O3 Glasses

Scintillation and Dosimetric Properties of Sn-doped ZnO-SiO2-B2O3 Glasses

X-ray-induced Scintillation Governed by Energy Transfer Process in Glasses

Novos Materiais Dosimétricos para Aplicações em Física Médica

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