Abstract
The neutron-rich nuclides $^{109}\mathrm{Tc}$ and $^{110}\mathrm{Tc}$, produced by thermal-neutron-induced fission of $^{249}\mathrm{Cf}$, have been identified using a fast automated chemical procedure for the separation of technetium from the fission product mixture. Half-lives of 1.4\ifmmode\pm\else\textpm\fi{}0.4 and 1.0\ifmmode\pm\else\textpm\fi{}0.2 sec for $^{109}\mathrm{Tc}$ and $^{110}\mathrm{Tc}$, respectively, have been deduced from $\ensuremath{\gamma}$-ray spectra of the technetium fraction.RADIOACTIVITY $^{109}\mathrm{Tc}$, $^{110}\mathrm{Tc}$, measured ${T}_{\frac{1}{2}}$. Fission $^{249}\mathrm{Cf} ({n}_{\mathrm{th}},f)$; automated chemical separation procedure, Ge(Li) detector.
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