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2006 Fiscal Year Final Research Report Summary

Neutrino mass study using 100Mo double beta decay with spectroscopic detector MOON

Research Project

Project/Area Number 15204022
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Particle/Nuclear/Cosmic ray/Astro physics
Research InstitutionOsaka University

Principal Investigator

NOMACHI Masaharu  Osaka University, Graduate school of science, Professor (90208299)

Co-Investigator(Kenkyū-buntansha) SUGAYA Yorihito  Osaka University, Graduate school of science, Assistant Professor (80324747)
EJIRI Hiroyasu  Osaka University, Professor Emeritus (80013374)
FUSHIMI Ken-ichi  Tokushima University, Faculty of Integrated Arts and Sciences, Associate Professor (90274191)
SHIMA Tasushi  Osaka University, Research Center for Nuclear Physics, Assistant Professor (10222035)
Project Period (FY) 2003 – 2006
Keywordsdouble beta decay
Research Abstract

We have developed prototype detector MOON-1 for the next generation double beta decay experiment. The detector is installed at Ohto underground laboratory, Research Center for Nuclear Physics, Osaka University. MOON-1 is six layers of plastic scintillator plates (53cm square) and 100Mo foils interleaved by the scintillator plates. Scintillation light is collected by 60 photo multipliers surrounding the plates. The developments and the measurements were proceeded as the followings.
2003: Test measurements
2004: Design and development of the MOON-1 detector
2005: Install in the underground laboratory and start the measurements.
2006: Continue the measurements. MOON-1 was uninstalled in the autumn.
2007: Thst measurements.
Calibration method in the low background environment is developed. Energy resolution is evaluated using Compton scattering of background gamma rays. Energy resolution is a key in the detector sensitivity for neutrino-less double beta decay. It is one of the most important points to rest MOON-1 detector. The resolution obtained is 7%(FWHM) at the Q value of the double beta decay. It is quite good resolution for such large (53cm square) plastic scintillator plates. The background is studied for developing the next generation double beta decay detectors.

  • Research Products

    (20 results)

All 2006 2005 2004 2003

All Journal Article (12 results) Presentation (8 results)

  • [Journal Article] MOON for spectroscopic studies of double beta decays and the presentstatus of the MOON-1 prototype detector2006

    • Author(s)
      H. Nakamura, et al.
    • Journal Title

      J. Phys. Conf. Ser. 39

      Pages: 350

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] The MOON-1 detector construction and the study of backgrounds fromradioactive isotopes2006

    • Author(s)
      T. Ogama, et al.
    • Journal Title

      J. Phys. Conf. Ser. 39

      Pages: 361

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] MOON for spectroscopic studies of double beta decays and the present status of the M00N-1 prototype detector2006

    • Author(s)
      H. Nakamura, et al.
    • Journal Title

      J. Phys. Conf. Ser. 39

      Pages: 350

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] The M00N-1 detector construction and the study of backgrounds from radioactive isotopes2006

    • Author(s)
      T. Ogama, et al.
    • Journal Title

      J. Phys. Conf. Ser. 39

      Pages: 361

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] MOON(MO Observatory Of Neutrinos)for double beta decay2005

    • Author(s)
      M. Nomachi, et al.
    • Journal Title

      Nucl. Phys. Proc. Suppl. 138

      Pages: 221

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Spectroscopy of low energy solar neutrinos by MOON : Mo ObservatoryOf Neutrinos2005

    • Author(s)
      R. Hazama, et al.
    • Journal Title

      Nucl. Phys. Proc. Suppl. 138

      Pages: 102

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] MOON (Mo Observatory Of Neutrinos) for double beta decay2005

    • Author(s)
      M. Nomachi, et al.
    • Journal Title

      Nucl. Phys. Proc. Suppl. 138

      Pages: 221

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Spectroscopy of low energy solar neutrinos by MOON: Mo Observatory Of Neutrinos2005

    • Author(s)
      R. Hazama, et al.
    • Journal Title

      Nucl. Phys. Proc. Suppl. 138

      Pages: 102

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Double beta decays and solar neutrinos with Mo-1002004

    • Author(s)
      H. Eiiri, et al.
    • Journal Title

      Czech. J. Phys. 54

      Pages: B317

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Double beta decays and solar neutrinos with Mo-1002004

    • Author(s)
      H. Ejiri, et al.
    • Journal Title

      Czech. J. Phys. 54

      Pages: B317

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Neutrino studies in Mo-100 and MOON : Mo Observatory Of Neutrinos2003

    • Author(s)
      p. Doe, 他
    • Journal Title

      Nuclear Physics A721

      Pages: 517

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Neutrino studies in Mo-100 and MOON: Mo Observatory Of Neutrinos2003

    • Author(s)
      P. Doe, et al.
    • Journal Title

      Nuclear Physics A721

      Pages: 517

    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] The MOON-1 detector construction and the study of backgrounds fromradioactive isotopes2005

    • Author(s)
      T. Ogama
    • Organizer
      9th International Conference on Astroparticle andUnderground Physics (TAUP 2005)
    • Place of Presentation
      Zaragoza, Spain
    • Year and Date
      20050910-20050914
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] MOON for spectroscopic studies of double beta decays and the presentstatus of the MOON-1 prototype detector2005

    • Author(s)
      H. Nakamura
    • Organizer
      9th International Conference on Astroparticle andUnderground Physics (TAUP 2005)
    • Place of Presentation
      Zaragoza, Spain
    • Year and Date
      20050910-20050914
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] The M00N-1 detector construction and the study of backgrounds from radioactive isotopes2005

    • Author(s)
      T. Ogama
    • Organizer
      9th International Conference on Astroparticle and Underground Physics (TAUP 2005)
    • Place of Presentation
      Zaragoza, Spain
    • Year and Date
      20050910-20050914
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] MOON for spectroscopic studies of double beta decays and the present status of the M00N-1 prototype detector2005

    • Author(s)
      H. Nakamura
    • Organizer
      9th International Conferenceon Astroparticle and Underground Physics (TAUP 2005)
    • Place of Presentation
      Zaragoza, Spain
    • Year and Date
      20050910-20050914
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] Spectroscopy of low energy solar neutrinos by MOON : Mo ObservatoryOf Neutrinos2003

    • Author(s)
      R. Hazama
    • Organizer
      8th International Workshop on Topics in Astropartide and Underground Physics (TAUP 2003)
    • Place of Presentation
      Seattle, Washington
    • Year and Date
      20030905-20030909
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] MOON(MO Observatory Of Neutrinos)for double beta decay2003

    • Author(s)
      M. Nomachi
    • Organizer
      8th International Workshop on Topics in Astropartide and Underground Physics (TAUP 2003)
    • Place of Presentation
      Seattle, Washington
    • Year and Date
      20030905-20030909
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Spectroscopy of low energy solar neutrinos by MOON : Mo Observatory Of Neutrinos2003

    • Author(s)
      R. Hazama
    • Organizer
      8th International Workshop on Topics in Astroparticle and Underground Physics (TAUP 2003)
    • Place of Presentation
      Seattle, Washington
    • Year and Date
      20030905-20030909
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] MOON (Mo Observatory Of Neutrinos) for double beta decay2003

    • Author(s)
      M. Nomachi
    • Organizer
      8th International Workshop on Topics in Astroparticle and Underground Physics (TAUP 2003)
    • Place of Presentation
      Seattle, Washington
    • Year and Date
      20030905-20030909
    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2010-06-09  

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