Determination of the α -decay half-life of Po 210 based on film and slice bismuth samples at room temperature

The $\ensuremath{\alpha}$ decay rate of $^{210}\text{Po}$ was measured in a film sample $(^{210}\text{Po}@{\mathrm{Bi}}_{2}{\mathrm{O}}_{3})$ and a slice sample $(^{210}\text{Po}@\mathrm{Bi}\phantom{\rule{4.pt}{0ex}}\mathrm{metal})$, respectively. The former was used as a reference sample. The half-lives of $^{210}\text{Po}@{\mathrm{Bi}}_{2}{\mathrm{O}}_{3}$ and $^{210}\text{Po}@\mathrm{Bi}$ metal environments were observed to be $(138.40\ifmmode\pm\else\textpm\fi{}0.21\phantom{\rule{0.16em}{0ex}}\text{d})$ and $(138.87\ifmmode\pm\else\textpm\fi{}0.87\phantom{\rule{0.16em}{0ex}}\text{d})$ at room temperature, respectively. It was found that the half-life of $^{210}\text{Po}$ is consistent with international recommendations within the uncertainty limits, and we did not find any deviation of the $\ensuremath{\alpha}$ decay rate of $^{210}\text{Po}$ between film sample $(^{210}\text{Po}@{\mathrm{Bi}}_{2}{\mathrm{O}}_{3})$ and slice sample $(^{210}\text{Po}@\mathrm{Bi}\phantom{\rule{4.pt}{0ex}}\mathrm{metal})$.