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Your search keyword '"Kawano, Naoki"' showing total 121 results
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121 results on '"Kawano, Naoki"'

29. Scintillation and dosimetric properties of Tb4O7-doped Ca2BO3Cl.

Author

Kawano, Naoki, Kato, Takumi, Nakauchi, Daisuke, Fukushima, Hiroyuki, Takebuchi, Yuma, Shiratori, Daiki, and Yanagida, Takayuki

Abstract

We synthesized calcium borate chlorides (Ca2BO3Cl) with different amounts of Tb4O7 (0.1, 0.5, 1.0%), and investigated photoluminescence, scintillation, and dosimetric characteristics. Photoluminescence and scintillation owing to the electronic transition between 4f levels of Tb3+ were observed, and the 0.1% Tb4O7-doped Ca2BO3Cl exhibited the highest intensity. Further, thermal stimulated luminescence (TSL) glow peaks appeared at approximately 90, 140, and 340 °C from the fabricated Ca2BO3Cl, and the 0.1% Tb4O7-doped Ca2BO3Cl with the largest glow peak intensity exhibited a dose response in the 10–10000 mGy range. Moreover, the fabricated Ca2BO3Cl showed optical stimulated luminescence (OSL) owing to the electronic transition between 4f levels of Tb3+, and three OSL exponential decay components were detected from the fabricated Ca2BO3Cl, suggesting the presence of at least three detrapping processes for OSL. [ABSTRACT FROM AUTHOR]

Published
2024
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33. Development and validation of artificial intelligence-based algorithms for predicting the segments debulked by rotational atherectomy using intravascular ultrasound

Author

hashimoto, kenta, primary, Fujii, Kenichi, additional, Ueda, Daiju, additional, sumiyoshi, Akinori, additional, Hasegawa, Katsuyuki, additional, Fukuhara, Rei, additional, Otagaki, Munemitsu, additional, Okamura, Atsunori, additional, Yamamoto, Wataru, additional, Kawano, Naoki, additional, Yamamoto, Akira, additional, Miki, Yukio, additional, and Shiojima, Ichiro, additional

Published
2023
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47. Dosimetric properties of Mn2+-doped Ca2BO3Cl

Author

Wauke, Tomoaki, primary, Koide, Sohya, additional, Kawano, Naoki, additional, Kato, Takumi, additional, Fukushima, Hiroyuki, additional, Takebuchi, Yuma, additional, Okada, Go, additional, and Yanagida, Takayuki, additional

Published
2022
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48. Dosimetric and scintillation properties of Tm-doped BaF2 translucent ceramics.

Author

Kawano, Naoki, Kato, Takumi, Nakauchi, Daisuke, Takebuchi, Yuma, Fukushima, Hiroyuki, Jacobsohn, Luiz G., and Yanagida, Takayuki

Abstract

BaF2 translucent ceramics with various amounts of TmF3 (0.01%, 0.1% and 1%) were fabricated, and their scintillation and thermally-stimulated luminescence (TSL) characteristics were evaluated. The Tm-doped BaF2 translucent ceramics showed a broad luminescence peak at approximately 300 nm originating from self-trapped excitons (STEs) while several sharp peaks derived from the 4f→4f transitions of Tm3+ were also detected from the 0.1% and 1% Tm-doped BaF2 translucent ceramics. Further, a TSL spectrum due to the 4f→4f transitions of Tm3+ was obtained at around 190 °C from the 1% Tm-doped BaF2 translucent ceramic while a weak broad peak due to STEs was observed at around 80 °C from the 0.01% Tm-doped BaF2 translucent ceramic. The 1% Tm-doped BaF2 translucent ceramic exhibited the strongest TSL glow peak intensity, and its linear TSL response was confirmed over a broad range, from 0.1 to 1000 mGy. [ABSTRACT FROM AUTHOR]

Published
2023
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