Measurement of the β-energy spectrum of H3 to determine the antineutrino mass

J. J. Simpson
Phys. Rev. D 23, 649 – Published 1 February 1981
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Abstract

An experiment to measure the β-energy spectrum of tritium implanted at high energy into a Si(Li) x-ray detector has been carried out primarily with the aim of determining the mass of the electron antineutrino, but also the extrapolated end-point energy of the β spectrum. The measurement implies a mass <65 eV with 95% confidence and a best value of 20 eV which is however only 0.2 standard deviations from zero mass. The end-point energy is 18 567±5 eV. A discussion of atomic effects which are important for calculating the H3-He3 atomic-mass difference from the end-point energy is presented, as well as a discussion on the possibility of improving the limit on the antineutrino mass in the present type of experiment.

  • Received 18 August 1980

DOI:https://doi.org/10.1103/PhysRevD.23.649

©1981 American Physical Society

Authors & Affiliations

J. J. Simpson

  • Department of Physics, University of Guelph, Guelph, Ontario N1G 2W1, Canada

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Issue

Vol. 23, Iss. 3 — 1 February 1981

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