Beta-delayed proton decay ofGe61

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.