Observation of daily and annular variations in the ²¹⁴Po half-life

Results: of the analysis of a time series of values of the half-life (τ) of the ²¹⁴Po nucleus with a different time step obtained from the TAU-1 (354 days) and TAU-2 (973 days) installations are presented. The annual variation with an amplitude of (9.8 ± 0.6) × 10⁻⁴ and daily variations in the solar, lunar, and sidereal times with amplitudes of (5.3 ± 0.3) × 10⁻⁴, (6.9 ± 2.0) × 10⁻⁴, and (7.2 ± 1.2) × 10⁻⁴, respectively, are found in the series of τ values. It is shown that variations in microclimatic parameters cannot be a cause of τ variations.