Measurements of atomic level widths in thulium: Effect on the measurement of neutrino mass from tritium beta decay spectra

C. L. Bennett, A. B. McDonald, P. T. Springer, T. E. Chupp, and M. L. Tate
Phys. Rev. C 31, 197 – Published 1 January 1985
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Abstract

Measurements have been made with curved crystal x-ray spectrometers of the natural line widths of the L1M2 (Γ=12.1±2 eV), L1M3 (Γ=12.7±1 eV), and M1N3 (Γ=19±3 eV) atomic transitions in Tm. These results are combined with published results to determine M1, M2, and M3 internal conversion line widths for Tm169. These lines have been used in the calibration of a beta spec- trometer for recent measurements of the electron antineutrino mass from the tritium beta decay spectrum. A reanalysis of these results suggests that there is no conclusive evidence for a finite mass for the electron antineutrino.

  • Received 18 June 1984

DOI:https://doi.org/10.1103/PhysRevC.31.197

©1985 American Physical Society

Authors & Affiliations

C. L. Bennett, A. B. McDonald, P. T. Springer, T. E. Chupp, and M. L. Tate

  • Physics Department, Princeton University, Princeton, New Jersey 08544

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Vol. 31, Iss. 1 — January 1985

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