Ultraviolet cross-luminescence in ternary chlorides of alkali and alkaline-earth metals

0549981 - FZÚ 2022 RIV NL eng J - Journal Article
Vaněček, Vojtěch - Páterek, Juraj - Král, Robert - Kučerková, Romana - Babin, Vladimir - Rohlíček, Jan - Cala', R. - Kratochwil, N. - Auffray, E. - Nikl, Martin
Ultraviolet cross-luminescence in ternary chlorides of alkali and alkaline-earth metals.
Optical Materials: X. Roč. 12, Dec (2021), č. článku 100103. ISSN 2590-1478
R&D Projects: GA MŠMT(CZ) EF16_019/0000760
Grant - others:OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Institutional support: RVO:68378271
Keywords : cross-luminescence * Auger-free luminescence * core-valence luminescence * alkaline-earth halides * crystal growth * vertical Bridgman method
OECD category: Optics (including laser optics and quantum optics)
Method of publishing: Open access

After the discovery of a cross-luminescence (CL) in BaF2 in 1982, a large number of CL scintillators were investigated. However, no CL scintillator superior to BaF2 has been discovered, and the research of CL scintillators has subsided. Recent technological development in medical imaging and high-energy physics created a new demand for ultra-fast scintillators further supported by the development of UV-sensitive semiconductor photodetectors. As a consequence, renewed interest in CL scintillators appeared. To satisfy the requirements of fast timing applications high photo-detection efficiency, e. i. a good spectral match between the scintillator and photodetector must be achieved. Cesium-based ternary chlorides could provide a red-shift (~1.5 eV) of CL towards the sensitive region of the photodetector (PMT or SiPM) while keeping light output and timing characteristics comparable to BaF2.
Permanent Link: http://hdl.handle.net/11104/0325862