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Packing Conditions of Optical Separated CsI:Tl Scintillator by Silicon Collimator

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dc.contributor.author OHTAKE, R.
dc.contributor.author TABATA, K.
dc.contributor.author NISHIZAWA, J.
dc.contributor.author KOIKE, A.
dc.contributor.author AOKI, T.
dc.date.accessioned 2020-05-31T09:40:28Z
dc.date.available 2020-05-31T09:40:28Z
dc.date.issued 2019
dc.identifier.citation OHTAKE, R., TABATA, K., NISHIZAWA, J. et al. Packing Conditions of Optical Separated CsI:Tl Scintillator by Silicon Collimator. In: ICNMBE: International conference on Nanotechnologies and Biomedical Engineering: proc. of the 4rd intern. conf., Sept. 18-21 : Program & Abstract Book , 2019. Chişinău, 2019, p. 157. ISBN 978-9975-72-392-3. en_US
dc.identifier.isbn 978-9975-72-392-3
dc.identifier.uri https://doi.org/10.1007/978-3-030-31866-6_130
dc.identifier.uri http://repository.utm.md/handle/5014/8500
dc.description Access full text - https://doi.org/10.1007/978-3-030-31866-6_130 en_US
dc.description.abstract We have been developing a scintillator type X-ray imaging detector. The spatial resolution of this type detector is lower than that of direct conversion type detectors. This is because X-ray scintillation light spreads in the scintillator. To settle this issue, we proposed optical separations of scintillator by a silicon collimator, which is a silicon substrate processed into grid structure by the semiconductor micro processing technology. The silicon collimator which is filled with scintillators works as an X-ray imaging detector by joining with a photodiode array. In this study, melted Cesium Iodide doped with Thallium (CsI:Tl) was poured into the silicon collimator, and recrystallized. After that, Packing conditions of CsI:Tl in the silicon collimator were observed by Scanning Electron Microscope (SEM) and Computed Tomography (CT). These results suggested that holes on the silicon collimator was closely packed with CsI:Tl. An image of recrystallized CsI:Tl under X-ray irradiation was acquired. From this image we confirmed that CsI:Tl which was recrystallized in the silicon collimator emitted visible light by X-ray excitation. The pixel separation effects of the silicon collimator for light spreading was also confirmed. Moreover, a relative standard deviation of pixel value of the fabricated sample was lower than that of a sample made by the vacuum evaporation method in the previous study. This result indicated that uniformity of luminescence was improved. en_US
dc.language.iso en en_US
dc.publisher Tehnica UTM en_US
dc.rights Attribution-NonCommercial-NoDerivs 3.0 United States *
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/3.0/us/ *
dc.subject X-ray imaging detectors en_US
dc.subject scintillators en_US
dc.subject silicon collimator en_US
dc.subject recrystallization en_US
dc.title Packing Conditions of Optical Separated CsI:Tl Scintillator by Silicon Collimator en_US
dc.type Article en_US


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