We have reinvestigated the structure of the ${}^{107}\mathrm{Tc}$ nucleus reported in other works. Excited states in ${}^{107}\mathrm{Tc}$, populated in spontaneous fission of ${}^{248}\mathrm{Cm}$, were studied by means of prompt-$\gamma$ spectroscopy, using the EUROGAM2 multidetector array. Parity assignments to the 45.6 and 65.6 keV levels were changed, based on conversion coefficient measurements. A new band found on top of the 45.6 keV level corresponds to the $\pi 5∕2^{-}\left[303\right]$ configuration. The positive-parity, yrast band in ${}^{107}\mathrm{Tc}$ is built on top of the 65.6 keV level and corresponds to the $\pi 5∕2^{+}\left[422\right]$ configuration. The configurations observed in ${}^{107}\mathrm{Tc}$ agree well with the scheme of single-proton excitations calculated for this nucleus.

• Received 7 September 2004

DOI:https://doi.org/10.1103/PhysRevC.70.057308