[9a-S422-1~13] 15.1 Bulk crystal growth

[9a-S422-3] Growth and scintillation properties of 1 inch Li(Ca_0.73Sr_0.25Eu_0.02)AlF₆
neutron scintillator single crystal by Cz method

〇Kazuya Origuchi¹, Yuui Yokota², Masao Yoshino¹, Akihiro Yamaji¹, Yuji Ohashi², Shunsuke Kurosawa^2,3, Kei Kamada^2,4, Akira Yoshikawa^1,2,4 (1.IMR, Tohoku Univ, 2.NICHe, Tohoku Univ., 3.Yamagata Univ., 4.C&A)

Keywords:Neutron scintillator, Eu:LiCSAF, Bulk

Eu: LiCSAF is a neutron scintillator containing ^{6 </ sup> Li with a large neutron capture cross section, and it shows a high emission amount (20,000 to 30,000 photons / neutron) under neutron excitation, so that a promising neutron scintillator It is expected as crystal. Previous studies using the micro pulling down method have revealed that the Eu: LiCSAF single crystal shows the maximum amount of luminescence when the Sr concentration is 25% [2]. In order to put this into practical use, it is necessary to increase the size of the crystal, but with this material, efforts to upsize have not been done so far. Therefore, we have grown a 1 inch diameter Eu: LiCSAF single crystal using the Czochralski (Cz) method and conducted phase analysis, composition analysis and scintillation characteristic evaluation.}