Three-Laboratory Measurement of the ${}^{44}\mathrm{Ti}$ Half-Life

We report on a measurement of the ${}^{44}\mathrm{Ti}$ half-life aimed at lowering existing systematic uncertainties in this value, which is important to astrophysics. The half-life was measured by following the decay of ${}^{44}\mathrm{Ti}$ relative to ${}^{60}\mathrm{Co}$ for about 5 yr and the measurements were performed independently in three laboratories—Argonne, Jerusalem, and Torino. We suggest to combine our result, $59.0\pm 0.6$ yr, with the one from the accompanying Letter by Görres et al., $60.3\pm 1.3$ yr, to obtain a current “best value” for the half-life of ${}^{44}\mathrm{Ti}$ of $59.2\pm 0.6$ yr ( $1\sigma$ error).