Scintillation characteristics and temperature quenching of radio- and photoluminescence of Mg2+-codoped (Lu,Gd)3Al2.4Ga2.6O12:Ce garnet crystals

Warut Chewpraditkul, Nakarin Pattanaboonmee, Ongsa Sakthong, Weerapong Chewpraditkul, Akihiro Yamaji, Shunsuke Kurosawa, Kei Kamada, Akira Yoshikawa, Michał Makowski, Marcin E. Witkowski, Winicjusz Drozdowski, Alena Beitlerova, Romana Kucerkova, Vladimir Babin, Martin Nikl

研究成果: Article査読


Luminescence and scintillation characteristics of Mg2+-codoped (LuxGd3-x)Al2.4Ga2.6O12:Ce (x = 0.2–0.8) garnet crystals grown by the micro-pulling down method are investigated. The Ce3+ 5d1 → 4f luminescence is blue-shifted with increasing Lu content due to the decrease in crystal field splitting of the 5 d levels. With increasing Lu content, the shortening of scintillation decay time accompanied with a decrease of LY value as measured at room temperature can be explained by thermal ionization of the Ce3+ 5d1 excited state. Co-doping with Mg2+ results in the shortening of scintillation decay time, the reduction of LY value and afterglow intensity. At low temperature the radioluminescence quenching is observed in correlation with large thermoluminescence peaks, which can be attributed to the localization of electrons at intrinsic shallow traps.

ジャーナルOptical Materials
出版ステータスPublished - 2021 11

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 原子分子物理学および光学
  • 分光学
  • 物理化学および理論化学
  • 有機化学
  • 無機化学
  • 電子工学および電気工学


「Scintillation characteristics and temperature quenching of radio- and photoluminescence of Mg<sup>2+</sup>-codoped (Lu,Gd)<sub>3</sub>Al<sub>2.4</sub>Ga<sub>2.6</sub>O<sub>12</sub>:Ce garnet crystals」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。