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Search for Variations of 213Ро Half-Life

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Abstract

A device with the parent 229Th source was constructed to search for variations of the daughter 213Po half-life (T1/2 = 4.2 μs). A solar-daily variation with amplitude ASo = (5.3 ± 1.1) × 10–4, a lunar-daily variation with amplitude AL = (4.8 ± 2.1) × 10–4, and a sidereal-daily variation with amplitude AS = (4.2 ± 1.7) × 10–4 were found upon proceeding the data series over a 622-day interval (from July 2015 to March 2017). The 213Po half-life mean value is found to be T1/2 = 3.705 ± 0.001 μs. The reference value is corrected by 12%.

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ACKNOWLEDGMENTS

The study was supported by the High Energy Physics and Neutrino Astrophysics Program of the Presidium of the Russian Academy of Sciences.

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Authors and Affiliations

  1. Institute for Nuclear Research, Russian Academy of Sciences, 117312, Moscow, Russia

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

  2. Karazin Kharkiv National University, 61077, Kharkiv, Ukraine

    S. I. Panasenko & S. S. Ratkevich

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

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Translated by N. Semenova

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Alexeev, E.N., Gavrilyuk, Y.M., Gangapshev, A.M. et al. Search for Variations of 213Ро Half-Life. Phys. Part. Nuclei 49, 557–562 (2018). https://doi.org/10.1134/S1063779618040044

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  • DOI: https://doi.org/10.1134/S1063779618040044

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