On-line mass separation and K x-ray coincidences were used to identify the β decays of ${}_{}{}^{145}{}_{}{}^{}\mathrm{Er}$ and ${}_{}{}^{145}{}_{}{}^{}\mathrm{Ho}$. Only β-delayed proton emission was observed for ${}_{}{}^{145}{}_{}{}^{}\mathrm{Er}$ ($T_{1/2}$=0.9±0.3 s), and a total of 16 γ-ray transitions were assigned to the β decay of ${}_{}{}^{145}{}_{}{}^{}\mathrm{Ho}$ ($T_{1/2}$=2.4±0.1 s). A ${}_{}{}^{145}{}_{}{}^{}\mathrm{Ho}$ decay scheme was constructed which incorporates 13 γ-ray transitions and 10 excited levels in ${}_{}{}^{145}{}_{}{}^{}\mathrm{Dy}$ and establishes the ν$h_{11/2}$ isomeric level at $E_x$=118.2 keV. The low-lying neutron-hole structure in ${}_{}{}^{145}{}_{}{}^{}\mathrm{Dy}$ is compared to level systematics in even-Z nuclei with N=77, 79, and 81.

• Received 9 January 1989

DOI:https://doi.org/10.1103/PhysRevC.39.1972