The electron capture and ${\mathrm{\beta }}^{+}$-decay properties of ${}_{}{}^{145}{}_{}{}^{}\mathrm{Dy}$ (produced in ${}_{}{}^{58}{}_{}{}^{}\mathrm{Ni}$ + ${}_{}{}^{92}{}_{}{}^{}\mathrm{Mo}$ irradiations) were investigated following mass separation of A=145 isobars. A new 6(2)-s activity was identified and assigned to the ν${\mathit{s}}_{1/2}$ ${}_{}{}^{145}{}_{}{}^{}\mathrm{Dy}$ ground state. Its decay to low-spin levels in ${}_{}{}^{145}{}_{}{}^{}\mathrm{Tb}$ indicates that the base state for low-spin levels in this N=80 odd-Z nucleus is probably π${\mathit{d}}_{3/2}$ rather than π${\mathit{s}}_{1/2}$, as is the case for terbium nuclei with N=82, 84, and 86.

• Received 14 December 1992

DOI:https://doi.org/10.1103/PhysRevC.48.436