Neutron detection with LiCaAlF₆ scintillator doped with 3d-transition metal ions

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• 作者：Noriaki Kawaguchi ; Takayuki Yanagida ; Yutaka Fujimoto ; Yuki Furuya ; Yoshisuke Futami ; Akihiro Yamaji ; Kenichi Watanabe ; Atsushi Yamazaki ; Akira Uritani ; Shinji Kajimoto ; Hiroshi Fukumura ; Shunsuke Kurosawa ; Yuui Yokota ; Jan Pejchal ; Akira Yoshikawa
• 关键词：Scintillator ; Neutron ; Single crystal ; Fluoride
• 刊名：Radiation Measurements
• 出版年：2013
• 出版时间：August, 2013
• 年：2013
• 卷：55
• 期：Complete
• 页码：128-131
• 全文大小：560 K

文摘

Capability of thermal neutron detection was examined for LiCaAlF₆ (LiCAF) scintillators doped with 3d-transition metal ions. Their radioluminescence spectra were measured with an 241-Am source to simulate ⁶Li(n, ¦Á)³H reaction. The sufficiently intense radioluminescence was observed for the Mn, Co and Cu dopants, while only a weak one was observed for Ti, V, Fe and Ni. A Mn doped LiCAF crystal, which showed the highest radioluminescence intensity, was coupled with a Si avalanche photodiode for the examination of its neutron response. It was confirmed that the average current of the photodiode clearly increased under excitation with 13.5?meV neutron flux.