Eu and Rb co-doped LiCaAlF₆ scintillators for neutron detection

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• 作者：Akihiro Yamaji ; Takayuki Yanagida ; Noriaki Kawaguchi ; Yuui Yokota ; Yutaka Fujimoto ; Shunsuke Kurosawa ; Jan Pejchal ; Kenichi Watanabe ; Atsushi Yamazaki ; Akira Yoshikawa
• 关键词：LiCaAlF6 ; Single crystal ; Co-doping ; Thermal neutron ; Scintillator
• 刊名：Radiation Measurements
• 出版年：2013
• 出版时间：August, 2013
• 年：2013
• 卷：55
• 期：Complete
• 页码：132-135
• 全文大小：1106 K

文摘

Eu and Rb co-doped LiCaAlF₆ (LiCAF) single crystals with different dopant concentrations were grown by?the micro-pulling-down method for neutron detection. Their transmittance spectra showed strong?absorption bands at 200-220 and 290-350?nm, and under ²⁴¹Am alpha-ray excitation, their radioluminescence spectra exhibited an intense emission peak at 373?nm that was attributed to the Eu²⁺ 5d-4f transition. These results were consistent with those for the Rb-free Eu:LiCAF. The highest light yield among the grown crystals was 36,000?ph/n, which was 20 % greater than that of the Rb-free crystal. In addition, the neutron-excited scintillation decay times were 650-750?ns slower than that of the Rb-free Eu:LiCAF.