Title:
SCINTILLATOR AND RADIATION DETECTOR
Document Type and Number:
WIPO Patent Application WO/2021/132494
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing a scintillator which has a short fluorescence decay time, and in which fluorescence intensity after a time has elapsed is small when irradiated with radiation, and light-transmitting properties are markedly improved. A scintillator represented by general formula (1), the scintillator including Zr, the content of Zr in the scintillator being 1500 mass ppm or greater, and the scintillator being a block of a sintered compact. (1): QxNyO3z (In formula (1): Q includes at least one divalent metal element, and M includes at least Hf; and x, y, and z each independently satisfy the conditions 0.5 ≤ x ≤ 1.5, 0.5 ≤ y ≤ 1.5, and 0.7 ≤ z ≤ 1.5.)
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Inventors:
HAZU KOJI (JP)
HORIBE KENTARO (JP)
KAWANO TETSUYA (JP)
YAMAHARA KEIJI (JP)
KUROSAWA SHUNSUKE (JP)
YOSHIKAWA AKIRA (JP)
HORIBE KENTARO (JP)
KAWANO TETSUYA (JP)
YAMAHARA KEIJI (JP)
KUROSAWA SHUNSUKE (JP)
YOSHIKAWA AKIRA (JP)
Application Number:
PCT/JP2020/048520
Publication Date:
July 01, 2021
Filing Date:
December 24, 2020
Export Citation:
Assignee:
MITSUBISHI CHEM CORP (JP)
UNIV TOHOKU (JP)
UNIV TOHOKU (JP)
International Classes:
C09K11/00; C09K11/08; C09K11/67; G01T1/20; G21K4/00
Foreign References:
| JP2010235388A | 2010-10-21 | |||
| JP5674385B2 | 2015-02-25 | |||
| JP2016056378A | 2016-04-21 | |||
| JP2015151535A | 2015-08-24 |
Other References:
NAKAUCHI, DAISUKE ET AL.: "Scintillation properties of Ti-and Zr-doped lanthanum hafnate single crystals", OPTICAL MATERIALS, vol. 90, 11 March 2019 (2019-03-11), pages 227 - 230, XP085697225, DOI: 10.1016/j.optmat.2019.02.050
FUKUSHIMA, HIROYUKI ET AL.: "Photoluminescence and scintillation properties of Ti-doped CaHfO 3 crystals", JAPANESE JOURNAL OF APPLIED PHYSICS, vol. 58, 25 April 2019 (2019-04-25), pages 052005, XP055839443
NAKAUCHI, DAISUKE ET AL.: "Scintillation properties of RE 2 Hf 2 O 7 ( RE = La, Gd, Lu) single crystals prepared by xenon arc floating zone furnace", JAPANESE JOURNAL OF APPLIED PHYSICS, vol. 57, 7 September 2018 (2018-09-07), pages 100307, XP055839447
PILANIA, G. ET AL.: "Role of Multiple Charge States of Ce in the Scintillation of AB03 Perovskites", PHYSICAL REVIEW, vol. 10, 20 August 2018 (2018-08-20), pages 024026, XP055839467
E. V. VAN LOEFW. M. HIGGINSJ. GLODOC. BRECHERA. LEMPICKIV. VENKATARAMANIW. W. MOSESS. E. DERENZOK. S. SHAH, IEEE TRANSACTIONS ON NUCLEAR SCIENCE, vol. 54, 2007, pages 741 - 743
A. GREZERE. ZYCHL. LEPINSKI, RADIATION MEASUREMENTS, vol. 45, 2010, pages 386 - 388
See also references of EP 4083165A4
FUKUSHIMA, HIROYUKI ET AL.: "Photoluminescence and scintillation properties of Ti-doped CaHfO 3 crystals", JAPANESE JOURNAL OF APPLIED PHYSICS, vol. 58, 25 April 2019 (2019-04-25), pages 052005, XP055839443
NAKAUCHI, DAISUKE ET AL.: "Scintillation properties of RE 2 Hf 2 O 7 ( RE = La, Gd, Lu) single crystals prepared by xenon arc floating zone furnace", JAPANESE JOURNAL OF APPLIED PHYSICS, vol. 57, 7 September 2018 (2018-09-07), pages 100307, XP055839447
PILANIA, G. ET AL.: "Role of Multiple Charge States of Ce in the Scintillation of AB03 Perovskites", PHYSICAL REVIEW, vol. 10, 20 August 2018 (2018-08-20), pages 024026, XP055839467
E. V. VAN LOEFW. M. HIGGINSJ. GLODOC. BRECHERA. LEMPICKIV. VENKATARAMANIW. W. MOSESS. E. DERENZOK. S. SHAH, IEEE TRANSACTIONS ON NUCLEAR SCIENCE, vol. 54, 2007, pages 741 - 743
A. GREZERE. ZYCHL. LEPINSKI, RADIATION MEASUREMENTS, vol. 45, 2010, pages 386 - 388
See also references of EP 4083165A4
Attorney, Agent or Firm:
IP FIRM SHUWA (JP)
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