Li.sup.+./sup., Na.sup.+./sup. and K.sup.+./sup. co-doping effects on scintillation properties of Ce: Gd.sub.3./sub.Ga.sub.3./sub.Al.sub.2./sub.O.sub.12./sub. single crystals

0501264 - FZÚ 2019 RIV NL eng J - Článek v odborném periodiku
Yoshino, M. - Kamada, K. - Kochurikhin, V.V. - Ivanov, M. - Nikl, Martin - Okumura, S. - Yamamoto, S. - Yeom, J.Y. - Shoji, Y. - Kurosawa, S. - Yokota, Y. - Ohashi, Y. - Yoshikawa, A.
Li⁺, Na⁺ and K⁺ co-doping effects on scintillation properties of Ce: Gd₃Ga₃Al₂O₁₂ single crystals.
Journal of Crystal Growth. Roč. 491, June (2018), s. 1-5. ISSN 0022-0248. E-ISSN 1873-5002
Grant ostatní: AV ČR(CZ) JSPS-17-18
Program: Bilaterální spolupráce
Institucionální podpora: RVO:68378271
Klíčová slova: scintillator materials * single crystal growth * Czochralski method * oxides
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 1.573, rok: 2018

Ce0.5%: Ce:Gd3Ga3Al2O12(GGAG) single crystals co-doped with 500at.ppm Li+, Na+ and K+ were grown by using the micro-pulling down method. The smooth Ce4+ charge transfer absorption below 350 nm and decay time acceleration were observed in Li co-doped sample. Na+ and K+ co-doping did not show a large effect on the acceleration of decay time compared with Li co-doping. Ce0.5%:GGAG single crystals codoped with 500 at.ppm Li+ were also grown by the Czochralski method. Optical, scintillation properties and timing performance were evaluated to investigate the effect of univalent alkali metal ions co-doping on Ce:GGAG scintillators. The scintillation decay curves were accelerated by Li co-doping: the decay time was significantly accelerated to 54.8ns (47%) for the faster component and 58ns (53%) for the slower component. The light output was 94% of the non co-doped Ce:GGAG standard. The coincidence time resolution was improved to 258ps by Li co-doping.

Trvalý link: http://hdl.handle.net/11104/0293255