Scintillator for neutron detection and neutron detector

Radiant energy – Invisible radiant energy responsive electric signalling – Neutron responsive means

Reexamination Certificate

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Reexamination Certificate

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08044367

ABSTRACT:
A scintillator for neutron detection, comprising a metal fluoride crystal containing, as constituent elements, a metal having a valence of 2 or higher, such as calcium, aluminum or yttrium; lithium; and fluorine, the metal fluoride crystal containing 1.1 to 20 atoms per unit volume (atoms
m3) of6Li, having an effective atomic number of 10 to 40, containing a lanthanoid such as cerium, praseodymium or europium, and being represented by, for instance, LiCaAlF6, LiSrAlF6and LiYF4. The scintillator for neutron detection has high sensitivity to neutron rays, and is reduced in a background noise attributed to γ rays.

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Kentaro Fukuda et al., “Growth and Characterization of Ce doped LiCaAlF6 Crystals for Scintillator Application”, Abstracts of Lectures at the 66th Congress of the Japan Society of Applied Physics, No. 1, 211 (2005).
Kiyoshi Shimamura et al., “Growth of Ce-doped LiCaAlF6 and LiSrAlF6 single crystals by the Czochralski technique under CF4 atmosphere”, Journal of Crystal Growth 211, (2000) pp. 302-307.
Syed Naeem Ahmed, “Physics and Engineering of Radiation Detection”, American Press Inc. (2007) pp. 312-313 and 350-353.

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