Development of novel rare earth doped fluoride and oxide scintillators for two-dimensional imaging
来源期刊：JOURNAL OF RARE EARTHS2011年第12期
论文作者：A.Yoshikawa T.Yanagida Y.Yokota K.Kamada N.Kawaguchi K.Fukuda A.Yamazaki K.Watanabe A.Uritani T.Iguchi G.Boulon M.Nikl
文章页码：1178 - 1182
摘 要：Two topics were focused.The first one was about the gamma-ray scintillator,Pr3+:Lu3Al5O12（LuAG） .The second one was about neutron scintillator,Ce3+:6LiCaAlF6 and Eu2+:6LiCaAlF6（6LiCAF） .Those scintillators have been developed very recently for modern imaging appli-cations in the medical and homeland security fields.In both cases,the rare earth ions are playing the crucial role as emission centers.Pr3+ in LuAG provided fast 5d→4f transition providing noticeably shorter decay time than that of Ce3+.Among several candidate hosts,LuAG showed the best performance.Bulk crystal growth,basic scintillation properties,two-dimensional gamma-ray imaging and positron emission mammography（PEM） application were demonstrated.Due to the international situation,the homeland security was compromized by illicit traffic of explosives,drugs,nuclear materials,etc.and the ways to its improvement became an important R&D topic.For this purpose the Ce and Eu doped LiCAF ap-peared competitive candidates.Especially,when substitution of 3He neutron detectors was considered,the discrimination ability of gamma-ray from alpha-ray was important.Bulk crystal growth,basic scintillation properties and two-dimensional neutron imaging were demonstrated.
A.Yoshikawa1,2，T.Yanagida2，Y.Yokota1，K.Kamada1，N.Kawaguchi1,3，K.Fukuda1,3，A.Yamazaki4，K.Watanabe4，A.Uritani4，T.Iguchi4，G.Boulon1,5，M.Nikl6
1. Institute for Materials Research,Tohoku University2. New Industry Creation Hatchery Center,Tohoku University4. Nagoya University,Furo-cho,Chikusa-ku5. Physical Chemistry of Luminescent Materials(LPCML) ,University of Lyon6. Institute of Physics AS CR
摘 要：Two topics were focused.The first one was about the gamma-ray scintillator,Pr3+:Lu3Al5O12（LuAG） .The second one was about neutron scintillator,Ce3+:6LiCaAlF6 and Eu2+:6LiCaAlF6（6LiCAF） .Those scintillators have been developed very recently for modern imaging appli-cations in the medical and homeland security fields.In both cases,the rare earth ions are playing the crucial role as emission centers.Pr3+ in LuAG provided fast 5d→4f transition providing noticeably shorter decay time than that of Ce3+.Among several candidate hosts,LuAG showed the best performance.Bulk crystal growth,basic scintillation properties,two-dimensional gamma-ray imaging and positron emission mammography（PEM） application were demonstrated.Due to the international situation,the homeland security was compromized by illicit traffic of explosives,drugs,nuclear materials,etc.and the ways to its improvement became an important R&D topic.For this purpose the Ce and Eu doped LiCAF ap-peared competitive candidates.Especially,when substitution of 3He neutron detectors was considered,the discrimination ability of gamma-ray from alpha-ray was important.Bulk crystal growth,basic scintillation properties and two-dimensional neutron imaging were demonstrated.
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