In an investigation of A=146 isobars, produced in ${}_{}{}^{58}{}_{}{}^{}\mathrm{Ni}$ bombardments of ${}_{}{}^{92}{}_{}{}^{}\mathrm{Mo}$, the electron capture and ${\mathrm{\beta }}^{+}$ decay of the previously unknown isotope ${}_{}{}^{146}{}_{}{}^{}\mathrm{Er}$ was identified. This nuclidic assignment was based on the observation of Ho K x rays in coincidence with β-delayed protons as well as in total-projected coincidence γ-ray spectra. From the time distribution of the x-ray events seen in these total-projected spectra the half-life of ${}_{}{}^{146}{}_{}{}^{}\mathrm{Er}$ was determined to be 1.7(6) s.

• Received 23 February 1993

DOI:https://doi.org/10.1103/PhysRevC.48.445