Scintillation characteristics of LiCaAlF.sub.6./sub.-based single crystals under X-ray excitation

0396555 - FZÚ 2014 RIV US eng J - Journal Article
Nikl, Martin - Brůža, P. - Pánek, D. - Vrbová, M. - Mihóková, Eva - Mareš, Jiří A. - Beitlerová, Alena - Kawaguchi, N. - Fukuda, K. - Yoshikawa, A.
Scintillation characteristics of LiCaAlF₆-based single crystals under X-ray excitation.
Applied Physics Letters. Roč. 102, č. 16 (2013), "161907-1"-"161907-4". ISSN 0003-6951. E-ISSN 1077-3118
R&D Projects: GA MŠMT LH12150
Institutional support: RVO:68378271
Keywords : scintillators * luminecence * X-ray excitation * LiCaAlF₆
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 3.515, year: 2013

LiCaAlF6-based scintillators are studied under X- and soft gamma-ray excitations. Under nanosecond pulsed soft X-ray laser excitation the scintillation decay is measured with extremely high dynamical resolution and broad time scale. The undoped LiCaAlF6 shows complex temperature dependence of exciton luminescence and tunneling-driven energy transfer process in scintillation decay. In both the Ce and Eu-doped LiCaAlF6 the dominant part of measured scintillation decay is due to prompt recombination of electrons and holes at the doped emission centers. Nevertheless, the measured light yield value is considerably lower with respect to the derived upper limits. Possible origin of its deterioration is discussed.
Permanent Link: http://hdl.handle.net/11104/0224309