学术文献库

Results of a comparative analysis of the $^{214}$Po ($T_{1/2}= 163.47\pm0.03$ $μ$s), $^{213}$Po ($T_{1/2}=3.705 \pm 0.001$ $μ$s) and $^{212}$Po ($T_{1/2}=294.09\pm0.07$ ns) half-life annular variation parameters are presented. It is shown that two independent sequential sets of the $^{214}$Po $τ$-values $(τ\equiv T_{1/2})$ obtained in the spaced laboratories can be described by sinusoidal functions. The sinusoid curve with amplitude $A=(5.0 \pm1.5) \cdot 10^{-4}$, period $ω=(365\pm 8)$ days, and phase $ϕ=(170 \pm 7)$ days approximates the set of $^{214}$Po $τ$ values obtained at BNO INR RAS during the $\sim$973 days starting on January 4, 2012. The function approximates a set of $τ$-values with a time duration of $\sim1460$ days obtained at the KhNU has an amplitude $A=(4.9\pm1.8)\cdot10^{-4}$, a period $ω= (377\pm13)$ days and a phase $ϕ=(77\pm10)$ days. The $^{213}$Po $τ$-value set with a time duration of $\sim1700$ days can be described by a sinusoidal function with an amplitude $A=(3.9\pm1.2)\cdot10^{-4}$, a period $ω= (370\pm13)$ days and a phase $ϕ=(130\pm9)$ days. The $^{212}$Po $τ$-value set with a time duration of $\sim670$ days can be described by a sinusoidal function with an amplitude $A=(7.5\pm1.6)\cdot10^{-4}$, a period $ω= (375\pm13)$ days and a phase $ϕ=(40\pm10)$ days.