Measurement of the Mass of the Electron Neutrino Using Electron Capture in 163Ho

  • S. Yasumi
  • M. Ando
  • H. Maezawa
  • H. Kitamura
  • T. Ohta
  • F. Ochiai
  • A. Mikuni
  • M. Maruyama
  • M. Fujioka
  • K. Ishii
  • T. Shinozuka
  • K. Sera
  • T. Omori
  • G. Izawa
  • M. Yagi
  • K. Masumoto
  • K. Shima
  • T. Mukoyama
  • Y. Inagaki
  • I. Sugai
  • A. Masuda
  • O. Kawakami
Conference paper

Abstract

The mass of the electron neutrino has been recently investigated using electron capturing isotopes including 163Ho [1,2,3], 193pt [4] and so on. There are two ways to measure mνe; one proposed by A. De Rújula [5] of CERN which is essentially based on three body phase space in radiative electron capture process, and another that utilizes the mνe-dependence of. the electron capture rate, which was discussed by Bennett et al. [6]. Considerations of the intensity of internal bremsstrahlung at electron capture in a 163Ho source, indicate that the first approach is very difficult [7,8]. Therefore, for the time being, we decided to pursue the second approach [9].

Keywords

Half Life Sera Dysprosium 

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References

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Copyright information

© Springer-Verlag Berlin Heidelberg 1986

Authors and Affiliations

  • S. Yasumi
    • 1
    • 2
  • M. Ando
    • 2
  • H. Maezawa
    • 2
  • H. Kitamura
    • 2
  • T. Ohta
    • 2
  • F. Ochiai
    • 2
  • A. Mikuni
    • 2
  • M. Maruyama
    • 3
  • M. Fujioka
    • 4
  • K. Ishii
    • 4
  • T. Shinozuka
    • 4
  • K. Sera
    • 4
  • T. Omori
    • 4
  • G. Izawa
    • 4
  • M. Yagi
    • 4
  • K. Masumoto
    • 4
  • K. Shima
    • 5
  • T. Mukoyama
    • 6
  • Y. Inagaki
    • 6
  • I. Sugai
    • 7
  • A. Masuda
    • 8
  • O. Kawakami
    • 8
  1. 1.Teikyo UniversityHachioji, TokyoJapan
  2. 2.National Laboratory for High Energy PhysicsKEKIbaraki-kenJapan
  3. 3.Osaka UniversityToyonaka, OsakaJapan
  4. 4.Tohoku UniversitySendaiJapan
  5. 5.University of TsukubaNiihari, IbarakiJapan
  6. 6.Kyoto UniversityKyotoJapan
  7. 7.Institute for Nuclear StudyUniversity of TokyoTanashi, TokyoJapan
  8. 8.University of TokyoTokyoJapan

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