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Physics of Particles and Nuclei

, Volume 49, Issue 4, pp 557–562 | Cite as

Search for Variations of 213Ро Half-Life

  • E. N. Alexeev
  • Yu. M. Gavrilyuk
  • A. M. Gangapshev
  • A. M. Gezhaev
  • V. V. Kazalov
  • V. V. Kuzminov
  • S. I. Panasenko
  • S. S. Ratkevich
Article

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%.

Keywords:

half-life 213Po nucleus daily and annual variations 

Notes

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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Copyright information

© Pleiades Publishing, Ltd. 2018

Authors and Affiliations

  • E. N. Alexeev
    • 1
  • Yu. M. Gavrilyuk
    • 1
  • A. M. Gangapshev
    • 1
  • A. M. Gezhaev
    • 1
  • V. V. Kazalov
    • 1
  • V. V. Kuzminov
    • 1
  • S. I. Panasenko
    • 2
  • S. S. Ratkevich
    • 2
  1. 1.Institute for Nuclear Research, Russian Academy of SciencesMoscowRussia
  2. 2.Karazin Kharkiv National UniversityKharkivUkraine

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