TY - JOUR
T1 - Effect of Ce doping on scintillation characteristics of LiYF4 single crystals for γ-ray detection
AU - Fukabori, Akihiro
AU - Yokota, Yuui
AU - Yanagida, Takayuki
AU - Moretti, Federico
AU - Chani, Valery
AU - Kawaguchi, Noriaki
AU - Kamada, Kei
AU - Yoshikawa, Akira
N1 - Funding Information:
Authors would like to thank Global Center of Excellence (GCOE) and partial support from Japan Science and Technology Agency (JST) with A-step program for their support. One of us (FM) is grateful to Cariplo Foundation for the financial help in the framework of the project “Energy transfer and trapping processes in nanostructured scintillator materials” (2008–2011).
PY - 2011/3/1
Y1 - 2011/3/1
N2 - 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.
AB - 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.
KW - μ-Pulling down
KW - Fluoride
KW - Gamma-ray detector
KW - Scintillator
KW - Single crystal
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U2 - 10.1016/j.nima.2010.12.102
DO - 10.1016/j.nima.2010.12.102
M3 - Article
AN - SCOPUS:79551473556
SN - 0168-9002
VL - 631
SP - 68
EP - 72
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
IS - 1
ER -