β+decay ofAs67

The ${\beta }^{+}$ decay of the new isotope ${}_{}{}^{67}{}_{}{}^{}\mathrm{As}$ to levels in ${}_{}{}^{67}{}_{}{}^{}\mathrm{Ge}$ has been studied via the reaction ${}_{}{}^{58}{}_{}{}^{}\mathrm{Ni}({}_{}{}^{14}{}_{}{}^{}\mathrm{N}, \alpha n){}_{}{}^{67}{}_{}{}^{}\mathrm{As}_{\to }^{\beta +67\mathrm{}}{}_{}{}^{}\mathrm{Ge}$ using 39- and 41-MeV ${}_{}{}^{14}{}_{}{}^{}\mathrm{N}$ ions. The ${}_{}{}^{67}{}_{}{}^{}\mathrm{As}$ half-life and total decay energy ($Q_{\mathrm{EC}}$) have been measured to be 42.5 ± 1.2 s and 6.01 ± 0.10 MeV, respectively. The ${\beta }^{+}$ decay scheme to 15 levels up to 2524-keV excitation in ${}_{}{}^{67}{}_{}{}^{}\mathrm{Ge}$ has been determined and, based on measured $log\mathrm{ft}$ values, a spin/parity constraint of $\frac{3}{2^{-}}$ or $\frac{5}{2^{-}}$ for the ground state of ${}_{}{}^{67}{}_{}{}^{}\mathrm{As}$ has been established.