Low-spin structure of110Rustudied by β decay of110Tc

The decay of the neutron-rich nucleus ${}^{110}\mathrm{Tc}$ has been investigated using β-γ and γ-γ coincidences. The on-line mass separated source is produced by using the ion-guide technique from fission products. An extended level scheme of ${}^{110}\mathrm{Ru}$ has been constructed, including 20 new excited states and 36 new γ transitions. The β feedings, $\log \mathrm{ft}$ values, and $B\left(E2\mathrm{}\right)\mathrm{}$ ratios were extracted. A spin and parity of $0^{+}$ is suggested for a level at 1137 keV in ${}^{110}\mathrm{Ru},$ and the spin and parity of the previously identified $2_3^{+}$ state was confirmed. Level systematics of neutron-rich even-even Ru isotopes shows that the maximum deformation is at $A=112\mathrm{}$ $\mathrm{}(N=68\mathrm{}),$ two neutrons more than the middle of the $N=50\mathrm{}–82$ neutron shell. The experimental results are compared with theoretical values calculated by different nuclear models.