The $T_z$=-(3/2), A=4n+1 nuclide ${}_{}{}^{61}{}_{}{}^{}\mathrm{Ge}$ has been produced via the ${}_{}{}^{40}{}_{}{}^{}\mathrm{Ca}$${(}^{24}$Mg,3n) reaction and identified by its beta-delayed proton emission. A single proton group at 3.11±0.03 MeV with $t_{1/2}$=40±15 ms has been observed, corresponding to decay of the T=(3/2) isobaric analog state in ${}_{}{}^{61}{}_{}{}^{}\mathrm{Ga}$ to the ground state of ${}_{}{}^{60}{}_{}{}^{}\mathrm{Zn}$. Searches for the beta-delayed proton decay of the next member of this series, ${}_{}{}^{65}{}_{}{}^{}\mathrm{Se}$, to be produced by the ${}_{}{}^{40}{}_{}{}^{}\mathrm{Ca}$${(}^{28}$Si,3n) reaction, have proven unsuccessful.

• Received 25 August 1986

DOI:https://doi.org/10.1103/PhysRevC.35.315