Comparative study of GdLu.sub.2./sub.Al.sub.2./sub.Ga.sub.3./sub.O.sub.12./sub.:Ce and GdY.sub.2./sub.Al.sub.2./sub.Ga.sub.3./sub.O.sub.12./sub.:Ce scintillation crystals for gamma-ray detection

0493049 - FZÚ 2019 RIV US eng J - Článek v odborném periodiku
Sakthong, O. - Chewpraditkul, W.R. - Chewpraditkul, W. - Szczesniak, T. - Swiderski, L. - Moszynski, M. - Kamada, K. - Yoshikawa, A. - Nikl, Martin
Comparative study of GdLu₂Al₂Ga₃O₁₂:Ce and GdY₂Al₂Ga₃O₁₂:Ce scintillation crystals for gamma-ray detection.
IEEE Transactions on Nuclear Science. Roč. 65, č. 8 (2018), s. 2081-2084. ISSN 0018-9499. E-ISSN 1558-1578
Grant CEP: GA ČR GA16-15569S
GRANT EU: European Commission(XE) 644260 - INTELUM
Institucionální podpora: RVO:68378271
Klíčová slova: coincidence time resolution * energy resolution * GdLu₂Al₂Ga₃O₁₂:Ce * GdY₂Al₂Ga₃O₁₂:Ce * light yield (LY) * scintillation decay
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 1.428, rok: 2018

The scintillation characteristics of Czochralski-grown GdLu2Al2Ga3O12:Ce and GdY2Al2Ga3O12:Ce single crystals were compared for gamma-ray detection. At 662-keV gamma-rays, light yield (LY) of 30700 photons/MeV obtained for GdLu2Al2Ga3O12:Ce is higher than that of 27 200 photons/MeV obtained for GdY2Al2Ga3O12:Ce, while its energy resolution is inferior (14% versus 10.6%) due to a larger nonproportionality of LY. Scintillation decays were measured using the time-correlated single photon counting technique. A fast component decay time of 48 ns with relative intensity of 71% obtained for GdLu2Al2Ga3O12:Ce is superior to that of 106 ns (57%) for GdY2Al2Ga3O12:Ce. The coincidence time spectrum was measured in reference to a fast BaF2 scintillator, and coincidence time resolution was discussed.
Trvalý link: http://hdl.handle.net/11104/0286513