Low temperature delayed recombination decay in scintillating garnets

0448054 - FZÚ 2016 RIV NL eng J - Journal Article
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
R&D Projects: GA ČR GA13-09876S
EU Projects: European Commission(XE) 316906 - LUMINET
Grant - others:AVČR(CZ) M100101212
Institutional support: RVO:68378271
Keywords : luminescence * garnets * scintillator * tunneling
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 2.183, year: 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.
Permanent Link: http://hdl.handle.net/11104/0253196