Title:
METAL FLUORIDE EUTECTIC, SCINTILLATOR FOR NEUTRONS, AND NEUTRON IMAGING DEVICE
Document Type and Number:
WIPO Patent Application WO/2012/060395
Kind Code:
A1
Abstract:
[Problem] To provide a scintillator for neutrons, which has excellent neutron detection efficiency, an excellent S/N ratio and excellent n/γ discrimination ability; and an eutectic which is suitable as the scintillator for neutrons.
[Solution] A metal fluoride eutectic comprising a lithium fluoride crystalline phase and a crystalline phase represented by the chemical formula: Ca1-xSrxF2 (wherein x is a numeral value larger than 0 and not smaller than 1), such as SrF2 and Ca0.5Sr0.5F2, wherein the crystalline phases are separated from each other; a scintillator for neutrons, which comprises the eutectic; and a neutron imaging device which comprises a combination of the scintillator for neutrons and a position-sensitive photomultiplier tube.
Inventors:
FUKUDA KENTARO (JP)
KAWAGUCHI NORIAKI (JP)
YOSHIKAWA AKIRA (JP)
YANAGIDA TAKAYUKI (JP)
YOKOTA YUI (JP)
FUJIMOTO YUTAKA (JP)
KAWAGUCHI NORIAKI (JP)
YOSHIKAWA AKIRA (JP)
YANAGIDA TAKAYUKI (JP)
YOKOTA YUI (JP)
FUJIMOTO YUTAKA (JP)
Application Number:
PCT/JP2011/075227
Publication Date:
May 10, 2012
Filing Date:
November 01, 2011
Export Citation:
Assignee:
TOKUYAMA CORP (JP)
UNIV TOHOKU (JP)
FUKUDA KENTARO (JP)
KAWAGUCHI NORIAKI (JP)
YOSHIKAWA AKIRA (JP)
YANAGIDA TAKAYUKI (JP)
YOKOTA YUI (JP)
FUJIMOTO YUTAKA (JP)
UNIV TOHOKU (JP)
FUKUDA KENTARO (JP)
KAWAGUCHI NORIAKI (JP)
YOSHIKAWA AKIRA (JP)
YANAGIDA TAKAYUKI (JP)
YOKOTA YUI (JP)
FUJIMOTO YUTAKA (JP)
International Classes:
C01F11/22; C09K11/00; C09K11/61; G01T1/202; G01T3/06
Foreign References:
| JP2007045870A | 2007-02-22 | |||
| JP2005503313A | 2005-02-03 |
Other References:
K. NAGAKUBO ET AL.: "Activity coefficients of component ions in LiF-SrF2 and NaF-SrF2 systems", DENKI KAGAKU, vol. 63, no. 10, 5 October 1995 (1995-10-05), pages 938 - 940
N. KAWAGUCHI ET AL.: "Fabrication and characterization of large size LiF/CaF2:Eu eutectic composites with the ordered lamellar structure", 2010 SYMPOSIUM ON RADIATION MEASUREMENTS AND APPLICATIONS ABSTRACT BOOK, 24 May 2010 (2010-05-24), pages 57
N.J. RHODES ET AL.: "Pixelated neutron scintillation detectors using fibre optic coded arrays", NUCLEAR INSTRUMENTS AND METHODS IN PHYSICS RESEARCH, vol. A392, 1997, pages 315 - 318, XP004090976, DOI: doi:10.1016/S0168-9002(97)00261-1
J. TROJAN-PIEGZA ET AL.: "CaF2(Eu2+):LiF - Structural and spectroscopic properties of a new system for neutron detection", RADIATION MEASUREMENTS, vol. 45, 2010, pages 163 - 167, XP026984466
See also references of EP 2636646A4
N. KAWAGUCHI ET AL.: "Fabrication and characterization of large size LiF/CaF2:Eu eutectic composites with the ordered lamellar structure", 2010 SYMPOSIUM ON RADIATION MEASUREMENTS AND APPLICATIONS ABSTRACT BOOK, 24 May 2010 (2010-05-24), pages 57
N.J. RHODES ET AL.: "Pixelated neutron scintillation detectors using fibre optic coded arrays", NUCLEAR INSTRUMENTS AND METHODS IN PHYSICS RESEARCH, vol. A392, 1997, pages 315 - 318, XP004090976, DOI: doi:10.1016/S0168-9002(97)00261-1
J. TROJAN-PIEGZA ET AL.: "CaF2(Eu2+):LiF - Structural and spectroscopic properties of a new system for neutron detection", RADIATION MEASUREMENTS, vol. 45, 2010, pages 163 - 167, XP026984466
See also references of EP 2636646A4
Attorney, Agent or Firm:
ONO, Hisazumi et al. (JP)
Ono Pure in addition (JP)
Ono Pure in addition (JP)
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Claims:
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