Growth of GSAG:Ce scintillator by floating zone method under pressurized oxygen atmosphere

0585003 - FZÚ 2025 RIV NL eng J - Článek v odborném periodiku
Zajíc, F. - Pospíšil, J. - Kučerková, Romana - Boháček, Pavel - Nikl, Martin
Growth of GSAG:Ce scintillator by floating zone method under pressurized oxygen atmosphere.
Journal of Crystal Growth. Roč. 627, Feb (2024), č. článku 127479. ISSN 0022-0248. E-ISSN 1873-5002
Grant CEP: GA ČR(CZ) GA21-17731S; GA MŠMT LM2023065
Institucionální podpora: RVO:68378271
Klíčová slova: floating zone technique * single crystal growth * oxides * scintillator materials * scintillators * garnets
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 1.8, rok: 2022

A single crystal of Gd2.88Sc1.89Al3.23O12:Ce (GSAG:Ce) garnet scintillator was grown by the crucible-free floating zone method in an advanced optical furnace with laser heaters equipped with a Pt/Rh passive afterheater. The effect of the growth process under pure oxygen accessible exclusively in the floating zone method was studied. Reported results show the potential of utilization of the (laser-diode) floating zone method for the preparation of oxide-based scintillators with high melting temperatures without costly crucibles. An unprecedented usage of oxygen overpressure is demonstrated, which results in partial stabilization of the cerium center in the tetravalent state.
Trvalý link: https://hdl.handle.net/11104/0352779