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Energy level measurements in Gd158: An investigation of a possible neutrino balance

Jim Thomas

John LoSecco

  • Kellogg Radiation Laboratory, California Institute of Technology, Pasadena, California 91125

  • Lauritsen Laboratory, California Institute of Technology, Pasadena, California 91125

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Phys. Rev. C 31, 577 – Published 1 February, 1985

DOI: https://doi.org/10.1103/PhysRevC.31.577

Abstract

The decay of Tb158 may be a sensitive neutrino balance which could yield the electron neutrino’s mass to within a few eV. The determination of the neutrino’s mass will require a knowledge of the energy levels in Gd158 and so we present new high precision measurements of the energies of the γ rays from the deexcitation of these levels. They are 780.166±0.007, 897.620±0.055, 944.181±0.009, 962.125±0.009, 977.070±0.170, 1107.635±0.009, and 1187.147±0.007. We also discuss the use of this neutrino balance and we review the current literature regarding the decay of Tb158.

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Phys. Rev. C 31, 577– Published 1 February, 1985
  • Received 13 August 1984

© 1985 American Physical Society

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