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Single Crystal Growth, Optical Properties and Neutron Response of {\rm Ce}^{3+} Doped {\rm LiCaAlF}_{6}

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14 Author(s)
Akira Yoshikawa ; Inst. of Multidiscipl. Res. for Adv. Mater. (IMRAM), Tohoku Univ., Sendai, Japan ; Takayuki Yanagida ; Yuui Yokota ; Noriaki Kawaguchi
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Ce2%:6LiCaAlF6 (6LiCAF) single crystal (nominal composition) with 2 mm in diameter and 50 mm in length was grown by the micro-pulling-down method. Emission from the perturbed Ce3+ centers was observed in an ¿-ray excited radioluminescence. The neutron response was compared with Li-glass (GS20, Saint-Gobain) using 252Cf. The scintillation decay time of Ce2%: 6LiCAF is 38 nsec, which is twice as short as that of GS20. Using Hamamatsu photomultiplier H7416 the photoelectron yield about a half of that of GS20 has been measured for the Ce: 6LiCAF single crystal . Considering the light yield of GS20 (6000 phot/neutron) and the spectral correction due to the different emission peak position in both materials, the light yield of Ce: 6LiCAF single crystal is estimated about 4200 phot/neutron.

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IEEE Transactions on Nuclear Science  (Volume:56 ,  Issue: 6 )