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Results of a search for daily and annual variations of the 214Po half-life at the two year observation period

  • The International Workshop on Prospects of Particle Physics: “Neutrino Physics and Astrophysics” February 1–Ferbuary 8, 2015, Valday, Russia
  • Published:
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Abstract

The brief description of installation TAU-2 intended for long-term monitoring of the half-life value τ(T 1/2) of the 214Po is presented. The methods of measurement and processing of collected data are reported. The results of analysis of time series values of τ with different time step are presented. Total measurement time was equal to 590 days. Averaged value of the 214Po half-life was obtained τ = 163.46 ± 0.04 μs. The annual variation with an amplitude A = (8.9 ± 2.3) × 10−4, solar-daily variation with an amplitude A So = (7.5 ± 1.2) × 10−4, lunar-daily variation with an amplitude A L = (6.9 ± 2.0) × 10−4 sidereal-daily variation with an amplitude A S = (7.2 ± 1.2) × 10−4 were found in a series of τ values. The maximal values of amplitude are observed at the moments when the projections of the installation Earth location velocity vectors toward the source of possible variation achieve its maximal magnitudes.

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Authors and Affiliations

  1. Baksan Neutrino Observatory INR RAS, Baksan, Russia

    E. N. Alexeyev, Yu. M. Gavrilyuk, A. M. Gangapshev, V. V. Kazalov & V. V. Kuzminov

  2. V.N. Karazin Kharkiv National University, Kharkiv, Ukraine

    S. I. Panasenko & S. S. Ratkevich

Authors
  1. E. N. Alexeyev
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  2. Yu. M. Gavrilyuk
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  3. A. M. Gangapshev
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  4. V. V. Kazalov
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  5. V. V. Kuzminov
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  6. S. I. Panasenko
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  7. S. S. Ratkevich
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Correspondence to E. N. Alexeyev.

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Talk at The International Workshop on Prospects of Particle Physics: “Neutrino Physics and Astrophysics” February 1–8, 2015, Valday, Russia.

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Alexeyev, E.N., Gavrilyuk, Y.M., Gangapshev, A.M. et al. Results of a search for daily and annual variations of the 214Po half-life at the two year observation period. Phys. Part. Nuclei 47, 986–994 (2016). https://doi.org/10.1134/S1063779616060034

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  • DOI: https://doi.org/10.1134/S1063779616060034

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