Half-Lives ofHfm2179andLum177

The half-lives of ${}_{}{}^{179}{}_{}{}^{}\mathrm{Hf}_{}^{m_2}{}_{}{}^{}$ and ${}_{}{}^{177}{}_{}{}^{}\mathrm{Lu}_{}^m{}_{}{}^{}$ were determined to be 24.8 ± 0.3 and 160.9 ± 0.3 day, respectively, using chemically and isotopically pure sources. The former is significantly lower than the literature value of 29 ± 1 day and the latter is in excellent agreement with the recent literature value of 161.0 ± 0.3 day.