Luminescence and light yield of (Gd.sub.2./sub.Y)(Ga.sub.3./sub.Al.sub.2./sub.)O.sub.12./sub.:Pr.sup.3+./sup. single crystal scintillators

0476188 - FZÚ 2018 RIV NL eng J - Článek v odborném periodiku
Lertloypanyachai, P. - Pathumrangsan, N. - Sreebunpeng, K. - Pattanaboonmee, N. - Chewpraditkul, W. - Yoshikawa, A. - Kamada, K. - Nikl, Martin
Luminescence and light yield of (Gd₂Y)(Ga₃Al₂)O₁₂:Pr³⁺ single crystal scintillators.
Journal of Crystal Growth. Roč. 468, Jun (2017), s. 369-372. ISSN 0022-0248. E-ISSN 1873-5002
Grant CEP: GA ČR GA16-15569S
Institucionální podpora: RVO:68378271
Klíčová slova: (Gd₂Y)(Ga₃Al₂)O₁₂:Pr³⁺ * photoelectron yield * luminescence * scintillation
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 1.742, rok: 2017

Praseodymium-doped (Gd 2 Y)(Ga 3 Al 2 )O 12 (GYGAG: Pr) single crystals are grown by the micro-pulling down method with different Pr concentrations. The energy transfer process between Pr 3+ and Gd 3+ is investigated by photoluminescence excitation (PLE) and emission (PL) spectra measurements. Photoelectron yield measurements are carried out using photomultiplier. At 662 keV γ-rays, photoelectron yield of 2520 phe/MeV obtained for the GYGAG: Pr (0.01%) sample is larger than that of 1810 phe/MeV obtained for BGO crystal. Light yield degradation for the GYGAG: Pr scintillators is presumably due to the energy transfer from 5d state of Pr 3+ to 4f state of Gd 3+ together with the concentration quenching in the Gd 3+sublattice.
Trvalý link: http://hdl.handle.net/11104/0272715