Effect of Ce content on the γ-ray response of LiYF4 single crystals with four different Ce concentrations is reported. The LiYF 4 crystals were grown by the micro-pulling down method (μ-PD) with Ce content ranged from 0.1 to 10 mol%. The emission spectra of all samples under α-ray (241Am) excitation are due to the Ce3 5d4f transition and are characterized by a band at about 320 nm. The pulse height spectra under γ-quanta (137Cs) were successfully observed and light yields were evaluated to be about 2800±280 (2 mol%), 3000±300 (5 mol%), and 3700±370 (10 mol%) phs/MeV, respectively. The energy resolution decreased with increasing of Ce concentration as follows: 12±3 (2 mol%), 19±3 (5 mol%), and 30±22 (10 mol%) %, respectively. The α/γ ratio were evaluated to be about 0.18 (2 mol%), 0.175 (5 mol%), and 0.15 (10 mol%), respectively. The non-proportionality curve of specimen with Ce 5 mol% doping exhibited good proportionality. Furthermore, the decay time examined with pulsed X-ray irradiation, detected using a streak camera, decreased with increasing of Ce concentration. © 2010 Elsevier B.V. All rights reserved.
Fukabori, A., Yokota, Y., Yanagida, T., Moretti, F., Chani, V., Kawaguchi, N., et al. (2011). Effect of Ce doping on scintillation characteristics of LiYF4 single crystals for γ-ray detection. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT, 631(1), 68-72 [10.1016/j.nima.2010.12.102].
Effect of Ce doping on scintillation characteristics of LiYF4 single crystals for γ-ray detection
MORETTI, FEDERICO;
2011
Abstract
Effect of Ce content on the γ-ray response of LiYF4 single crystals with four different Ce concentrations is reported. The LiYF 4 crystals were grown by the micro-pulling down method (μ-PD) with Ce content ranged from 0.1 to 10 mol%. The emission spectra of all samples under α-ray (241Am) excitation are due to the Ce3 5d4f transition and are characterized by a band at about 320 nm. The pulse height spectra under γ-quanta (137Cs) were successfully observed and light yields were evaluated to be about 2800±280 (2 mol%), 3000±300 (5 mol%), and 3700±370 (10 mol%) phs/MeV, respectively. The energy resolution decreased with increasing of Ce concentration as follows: 12±3 (2 mol%), 19±3 (5 mol%), and 30±22 (10 mol%) %, respectively. The α/γ ratio were evaluated to be about 0.18 (2 mol%), 0.175 (5 mol%), and 0.15 (10 mol%), respectively. The non-proportionality curve of specimen with Ce 5 mol% doping exhibited good proportionality. Furthermore, the decay time examined with pulsed X-ray irradiation, detected using a streak camera, decreased with increasing of Ce concentration. © 2010 Elsevier B.V. All rights reserved.
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