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2004 Fiscal Year Final Research Report Summary

Photostimulable phosphors for neutron imaging

Research Project

Project/Area Number 14350044
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Applied physics, general
Research InstitutionJapan Atomic Energy Research Institute

Principal Investigator

SAKASAI Kaoru  Japan Atomic Energy Research Institute, Neutron Science Research Center, Senior Engineer, 中性子利用研究センター, 副主任研究員 (00343913)

Co-Investigator(Kenkyū-buntansha) KATAGIRI M.  Japan Atomic Energy Research Institute, Neutron Science Research Center, Principal Engineer, 中性子利用研究センター, 主任研究員 (90354886)
MATSUBAYASHI M.  Japan Atomic Energy Research Institute, Neutron Science Research Center, Senior Engineer, 中性子利用研究センター, 副主任研究員 (50354767)
NAKAMURA T.  Japan Atomic Energy Research Institute, Neutron Science Research Center, Research Engineer, 中性子利用研究センター, 研究員 (60354768)
Project Period (FY) 2002 – 2004
Keywordsneutron imaging plate / photostimulable phosphor / gamma-ray sensitivity / neutron sensitivity / SrBPO_5:Eu / SrBPO_5:Ce / CaBPO_5:Ce / detective quantum efficiency
Research Abstract

As new photostimulable phosphors with low gamma-ray sensitivities, SrBPO5:Eu, SrBPO5:Ce, and CaBPO5:Ce based phosphors have been prepared and their photostimulated luminescence (PSL) characteristics by neutron irradiation were investigated. The PSL peak of SrBPO5:Eu was about 390 nm due to 5d-4f transition of Eu^<2+>. The PSL intensity was linearly dependent on E^<-1/2>, where E is neutron energy. The S_γ/S_n ratio of SrBPO_5:Eu phosphor was one order magnitudes lower than that of commercially available neutron imaging plates (NIPs), where S_n and S_γ are neutron and gamma-ray sensitivities, respectively. A collimated neutron beam image was obtained with a spatial resolution of 0.4 mm. The PSL characteristics of SrBPO5:Ce and CaBPO5:Ce were almost the same as those of SrBPO5:Eu. The peak and lifetime of PSL of these phosphors was 340nm and 23.5 ns, respectively. Moreover, the PSL intensity was significantly increased by introducing fluorine atoms. The detective quantum efficiency (DQE) of SrBPO5:Eu and CaBPO5:Ce can be more than 40 %, while that of commercially NIPS was less than 40%. Since the PSL peak of SrBPO5:Eu was the same as that of commercially NIPs, new NIPs made of SrBPO5:Eu was made and the image of imaging subjects was clearly obtained by using a conventional reader. The spatial resolution was 0.3 mm and the gamma-ray discrimination ability was better than that of commercially NIPs.

  • Research Products

    (11 results)

All 2004 2003 2002

All Journal Article (11 results)

  • [Journal Article] Characteristics of SrBPO_5:Ce^<3+> based materials as a neutron storage phosphor2004

    • Author(s)
      K.Sakasai et al.
    • Journal Title

      Nuclear Instruments and Methods in Physics Research A 529

      Pages: 378-383

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Neutron Storage Characteristics of CaBPO_5:Ce^<3+> Based Phosphors2004

    • Author(s)
      K.Sakasai et al.
    • Journal Title

      IEEE Transaction on Nuclear Science 51

      Pages: 1715-1716

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] A SrBPO_5:Ce^<3+> storage phosphors for neutron imaging2004

    • Author(s)
      K.Sakasai et al.
    • Journal Title

      IEEE Transaction of Nuclear Science Conference record (CD-ROM)

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] 中性子用イメージング用輝尽性蛍光体2004

    • Author(s)
      坂佐井他
    • Journal Title

      放射線 29

      Pages: 189-197

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] RBPO_5(R=Ca,Sr) Based Storage Phosphors for Neutron Detection2004

    • Author(s)
      K.Sakasai et al.
    • Journal Title

      IEEE Transaction of Nuclear Science Conference record

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Characteristics of a SrBPO_5:Eu^<2+> Materials as a Neutron Storage Phosphor2003

    • Author(s)
      K.Sakasai et al.
    • Journal Title

      IEEE Transaction on Nuclear Science 50

      Pages: 788-791

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Characteristics of a SrBPO_5:Eu^<2+> Materials as a Neutron Storage Phosphor2003

    • Author(s)
      K.Sakasai et al.
    • Journal Title

      IEEE Transaction on Nuclear Science 50 No.4

      Pages: 788-791

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] A SrBPO_5:Ce^<3+> storage phosphors for neutron imaging2003

    • Author(s)
      K.Sakasai et al.
    • Journal Title

      Proceedings of ICANS-XVI 1

      Pages: 447-453

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Photostimulable phosphors for neutron imaging (in Japanese)2003

    • Author(s)
      K.Sakasai et al.
    • Journal Title

      Radiation 29 No.4

      Pages: 189-197

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] A SrBPO_5:Eu^<2+> storage phosphor for neutron imaging2002

    • Author(s)
      K.Sakasai et al.
    • Journal Title

      Applied physics A 74

      Pages: S1589-S1591

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] A SrBPO_5 : Eu^<2+> storage phosphor for neutron imaging2002

    • Author(s)
      K.Sakasai et al.
    • Journal Title

      Applied Physics A 74

      Pages: S1589-S1591

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2006-07-11  

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