Low temperature delayed recombination decay in scintillating garnets

0448054 - FZÚ 2016 RIV NL eng J - Článek v odborném periodiku
Mihóková, Eva - Babin, Vladimir - Bartosiewicz, Karol - Schulman, L. S. - Čuba, V. - Kučera, M. - Nikl, Martin
Low temperature delayed recombination decay in scintillating garnets.
Optical Materials. Roč. 40, Fešb (2015), s. 127-131. ISSN 0925-3467. E-ISSN 1873-1252
Grant CEP: GA ČR GA13-09876S
GRANT EU: European Commission(XE) 316906 - LUMINET
Grant ostatní: AVČR(CZ) M100101212
Institucionální podpora: RVO:68378271
Klíčová slova: luminescence * garnets * scintillator * tunneling
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 2.183, rok: 2015

We study the temperature dependence of delayed recombination decay intensity in a variety of scintillatingcrystals based on garnet hosts in a wide temperature range 8–500 K. Previous work on several scintillatingmaterials based on silicate hosts showed nonzero constant signal from very low temperatures upto about 120 K. This observation supported a previously suggested hypothesis on low temperature lossesof fast scintillation light due to quantum tunneling between the activator and nearby traps. In garnets, the subject of the present article, we observe practically constant signal in the entire monitored temperaturerange. We thus further test and confirm the quantum tunneling hypothesis in a different class ofscintillating materials. We also show that there is no thermal ionization of the activator’s excited statein all materials studied, well above room temperature.
Trvalý link: http://hdl.handle.net/11104/0253196