TY - JOUR
T1 - Scintillation properties of Gd3(Al5-xGax)O12:Ce (x = 2.3, 2.6, 3.0) single crystals
AU - Chewpraditkul, Warut
AU - Pattanaboonmee, Nakarin
AU - Sakthong, Ongsa
AU - Chewpraditkul, Weerapong
AU - Szczesniak, Tomasz
AU - Moszynski, Marek
AU - Kamada, Kei
AU - Kurosawa, Shunsuke
AU - Yoshikawa, Akira
AU - Nikl, Martin
N1 - Funding Information:
The authors acknowledge the financial support provided by King Mongkut's University of Technology Thonburi through the “ KMUTT 55th Anniversary Commemorative Fund ”. Warut Chewpraditkul acknowledges the Petchra Pra Jom Klao Doctor's Degree Research Scholarship from King Mongkut's University of Technology Thonburi. This work is partially supported by next generation world-leading researchers JSPS. Financial support of EC H2020 project INTELUM , No. 644260 , joint Czech-Japan (ASCR-JSPS) collaboration project and Czech Science Foundation , No. 16-15569S project is also gratefully acknowledged.
Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2018/7
Y1 - 2018/7
N2 - Scintillation properties of Czochralski-grown Gd3(Al5-xGax)O12:Ce (x = 2.3, 2.6, 3.0) single crystals were investigated. With increasing Ga content in garnet host, the radioluminescence band due to 5d1 → 4f emission transition was blue-shifted due to a decrease in the crystal field splitting of the 5 d levels. At 662 keV γ rays, the LY value of 47,000, 55,100 and 51,900 ph/MeV was obtained for Gd3Al2.7Ga2.3O12:Ce, Gd3Al2.4Ga2.6O12:Ce and Gd3Al2Ga3O12:Ce, respectively. In spite of a lower LY value, Gd3Al2.7Ga2.3O12:Ce shows good energy resolution of 4.1% due to its proportionality of LY. The ratio of LY values under excitation with α- and γ-rays (α/γ ratio) was also determined. The fast component decay time with relative intensity of 146 ns (66%), 142 ns (76%) and 112 ns (76%) was measured in the scintillation decay of Gd3Al2.7Ga2.3O12:Ce, Gd3Al2.4Ga2.6O12:Ce and Gd3Al2Ga3O12:Ce, respectively. Good coincidence time resolution of Gd3Al2Ga3O12:Ce is due to a high initial photon emission rate.
AB - Scintillation properties of Czochralski-grown Gd3(Al5-xGax)O12:Ce (x = 2.3, 2.6, 3.0) single crystals were investigated. With increasing Ga content in garnet host, the radioluminescence band due to 5d1 → 4f emission transition was blue-shifted due to a decrease in the crystal field splitting of the 5 d levels. At 662 keV γ rays, the LY value of 47,000, 55,100 and 51,900 ph/MeV was obtained for Gd3Al2.7Ga2.3O12:Ce, Gd3Al2.4Ga2.6O12:Ce and Gd3Al2Ga3O12:Ce, respectively. In spite of a lower LY value, Gd3Al2.7Ga2.3O12:Ce shows good energy resolution of 4.1% due to its proportionality of LY. The ratio of LY values under excitation with α- and γ-rays (α/γ ratio) was also determined. The fast component decay time with relative intensity of 146 ns (66%), 142 ns (76%) and 112 ns (76%) was measured in the scintillation decay of Gd3Al2.7Ga2.3O12:Ce, Gd3Al2.4Ga2.6O12:Ce and Gd3Al2Ga3O12:Ce, respectively. Good coincidence time resolution of Gd3Al2Ga3O12:Ce is due to a high initial photon emission rate.
KW - Coincidence time resolution
KW - Energy resolution
KW - Gd(Al,Ga) O:Ce
KW - Light yield
KW - Nonproportionality of light yield
KW - Scintillation decay
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U2 - 10.1016/j.optmat.2018.05.015
DO - 10.1016/j.optmat.2018.05.015
M3 - Article
AN - SCOPUS:85046741344
VL - 81
SP - 23
EP - 29
JO - Optical Materials
JF - Optical Materials
SN - 0925-3467
ER -