The mass of the electron neutrino from electron capture in 163Ho

S. Yasumi, H. Maezawa, K. Shima, Y. Inagaki, T. Mukoyama, T. Mizogawa, K. Sera, S. Kishimoto, M. Fujioka, K. Ishii, T. Omori, G. Izawa, O. Kawakami

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Abstract

Using an M X-ray spectrum from electron capture in 163Ho together with M X-ray fluorescence spectra of the Dy atom, the partial decay constants of 163Ho, λM1 and λM2 were measured. With λM1, λM2 and λt (total decay constant) as three constraints, the mass of the electron neutrino, mVe, the Q-value, and log(ft) of the 163Ho decay were simultaneously determined. Results obtained are mVe=110-110+350 eV, Q=2.710-0.005+0.100 keV, and log(ft)=4.993-0.001+0.030.

Original languageEnglish
Pages (from-to)229-233
Number of pages5
JournalPhysics Letters B
Volume334
Issue number1-2
DOIs
Publication statusPublished - Aug 11 1994

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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    Yasumi, S., Maezawa, H., Shima, K., Inagaki, Y., Mukoyama, T., Mizogawa, T., Sera, K., Kishimoto, S., Fujioka, M., Ishii, K., Omori, T., Izawa, G., & Kawakami, O. (1994). The mass of the electron neutrino from electron capture in 163Ho. Physics Letters B, 334(1-2), 229-233. https://doi.org/10.1016/0370-2693(94)90616-5