Title:
SCINTILLATOR AND METHOD FOR MANUFACTURING SAME, RADIATION DETECTOR, AND RADIOGRAPHIC TESTING DEVICE
Document Type and Number:
WIPO Patent Application WO/2024/101327
Kind Code:
A1
Abstract:
The present invention provides a scintillator in which there are a reduced number of scattering centers in a crystal and scintillation properties are improved. The scintillator according to one embodiment of the present invention comprises a single crystal which contains Ce, Li, Y, B and O, optionally contains an A element (wherein the A element comprises at least one element selected from the group consisting of Na, K, Cs and Rb), an RE element (wherein the RE element comprises one or two or more elements selected from rare earth elements other than Ce and Y) and an M element (wherein the M element comprises at least one element selected from the group consisting of Mg, Ca, Sr and Ba), and is represented by general formula (Li1-xAx)6[(Y1-yREy)(1-z-p)CezMp)]B3O9-p/2 (wherein 0 ≤ x < 1, 0 ≤ y ≤ 1, 0 < z ≤ 0.06, 0 ≤ p ≤ 0.001), in which the density of scattering centers on a cross-sectional surface of the scintillator is less than 2×108/cm2.
Inventors:
YUAN DONGSHENG (JP)
GARCIA VILLORA ENCARNACION ANTONIA (JP)
SHIMAMURA KIYOSHI (JP)
YANAGIDA TAKAYUKI (JP)
KAWAGUCHI NORIAKI (JP)
NAKAUCHI DAISUKE (JP)
KATO TAKUMI (JP)
GARCIA VILLORA ENCARNACION ANTONIA (JP)
SHIMAMURA KIYOSHI (JP)
YANAGIDA TAKAYUKI (JP)
KAWAGUCHI NORIAKI (JP)
NAKAUCHI DAISUKE (JP)
KATO TAKUMI (JP)
Application Number:
PCT/JP2023/039956
Publication Date:
May 16, 2024
Filing Date:
November 07, 2023
Export Citation:
Assignee:
NAT INST MATERIALS SCIENCE (JP)
NATIONAL UNIV CORPORATION NARA INSTITUTE OF SCIENCE AND TECHNOLOGY (JP)
NATIONAL UNIV CORPORATION NARA INSTITUTE OF SCIENCE AND TECHNOLOGY (JP)
International Classes:
C09K11/00; C09K11/08; C09K11/78; C30B15/00; C30B29/22; C30B33/02; G01T1/20; G01T3/06
Foreign References:
| CN102021651A | 2011-04-20 | |||
| CN104372410A | 2015-02-25 |
Other References:
FAWAD U, KIM H.J.; PARK H.; KIM SUNGHWAN; KHAN SAJID: "Czochralski growth and scintillation properties of Li6Lu Y1−(BO3)3:Ce3+ single crystals", NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ELSEVIER BV * NORTH-HOLLAND, NL, vol. 806, 1 January 2016 (2016-01-01), NL , pages 117 - 122, XP093170255, ISSN: 0168-9002, DOI: 10.1016/j.nima.2015.10.008
OU YIYI, OU YIYI, ZHOU WEIJIE, HOU DEJIAN, BRIK MIKHAIL, DORENBOS PIETER, HUANG YAN, LIANG HONGBIN: "Impacts of 5d electron binding energy and electron–phonon coupling on luminescence of Ce 3+ in Li 6 Y(BO 3 ) 3", RSC ADVANCES, ROYAL SOCIETY OF CHEMISTRY, GB, vol. 9, no. 14, 11 March 2019 (2019-03-11), GB , pages 7908 - 7915, XP055835859, ISSN: 2046-2069, DOI: 10.1039/C9RA00381A
SINGH A.K.; TYAGI M.; SINGH S.G.; TIWARI B.; DESAI D.G.; SEN S.; DESAI S.S.; GHODKE S.S.; GADKARI S.C.: "Performance characteristics of thermal neutron detectors based on Li6Y(BO3)3:Ce single crystals", NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ELSEVIER BV * NORTH-HOLLAND, NL, vol. 804, 1 January 1900 (1900-01-01), NL , pages 189 - 193, XP029293229, ISSN: 0168-9002, DOI: 10.1016/j.nima.2015.09.077
FAWAD U.; KIM HONG JOO; PARK H.; KIM SUNGHWAN; KHAN SAJID: "Luminescence and Scintillation Properties of Czochralski Grown LYGBO Crystals", IEEE TRANSACTIONS ON NUCLEAR SCIENCE, IEEE, USA, vol. 63, no. 3, 1 June 2016 (2016-06-01), USA, pages 1720 - 1725, XP011614665, ISSN: 0018-9499, DOI: 10.1109/TNS.2016.2568239
SINGH AWADH K, TYAGI MOHIT; DESAI DAULAT G.; SINGH SHIV GOVIND; SEN SHASHWATI; GADKARI SANJAY C.: "A Comparative Study of Li 6 R(BO 3 ) 3 ; R = Gd, Lu, & Y), Single Crystals for Thermal Neutron Detection", PHYSICA STATUS SOLIDI. A: APPLICATIONS AND MATERIALS SCIENCE, WILEY - V C H VERLAG GMBH & CO. KGAA, DE, DE , pages 1800224, XP093170258, ISSN: 1862-6300, DOI: 10.1002/pssa.201800224
OU YIYI, OU YIYI, ZHOU WEIJIE, HOU DEJIAN, BRIK MIKHAIL, DORENBOS PIETER, HUANG YAN, LIANG HONGBIN: "Impacts of 5d electron binding energy and electron–phonon coupling on luminescence of Ce 3+ in Li 6 Y(BO 3 ) 3", RSC ADVANCES, ROYAL SOCIETY OF CHEMISTRY, GB, vol. 9, no. 14, 11 March 2019 (2019-03-11), GB , pages 7908 - 7915, XP055835859, ISSN: 2046-2069, DOI: 10.1039/C9RA00381A
SINGH A.K.; TYAGI M.; SINGH S.G.; TIWARI B.; DESAI D.G.; SEN S.; DESAI S.S.; GHODKE S.S.; GADKARI S.C.: "Performance characteristics of thermal neutron detectors based on Li6Y(BO3)3:Ce single crystals", NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ELSEVIER BV * NORTH-HOLLAND, NL, vol. 804, 1 January 1900 (1900-01-01), NL , pages 189 - 193, XP029293229, ISSN: 0168-9002, DOI: 10.1016/j.nima.2015.09.077
FAWAD U.; KIM HONG JOO; PARK H.; KIM SUNGHWAN; KHAN SAJID: "Luminescence and Scintillation Properties of Czochralski Grown LYGBO Crystals", IEEE TRANSACTIONS ON NUCLEAR SCIENCE, IEEE, USA, vol. 63, no. 3, 1 June 2016 (2016-06-01), USA, pages 1720 - 1725, XP011614665, ISSN: 0018-9499, DOI: 10.1109/TNS.2016.2568239
SINGH AWADH K, TYAGI MOHIT; DESAI DAULAT G.; SINGH SHIV GOVIND; SEN SHASHWATI; GADKARI SANJAY C.: "A Comparative Study of Li 6 R(BO 3 ) 3 ; R = Gd, Lu, & Y), Single Crystals for Thermal Neutron Detection", PHYSICA STATUS SOLIDI. A: APPLICATIONS AND MATERIALS SCIENCE, WILEY - V C H VERLAG GMBH & CO. KGAA, DE, DE , pages 1800224, XP093170258, ISSN: 1862-6300, DOI: 10.1002/pssa.201800224
Attorney, Agent or Firm:
TSUZUKI Noriaki (JP)
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