The ${\mathit{T}}_{\mathit{z}}$=-3/2, A=4n+1 nuclide ${}_{}{}^{73}{}_{}{}^{}\mathrm{Sr}$ produced in the ${}_{}{}^{40}{}_{}{}^{}\mathrm{Ca}$${(}^{36}$Ar,3n) reaction has been observed via beta-delayed proton emission. A single proton group at a laboratory energy of 3.75±0.04 MeV has been observed, corresponding to decay of the T=3/2 isobaric analog state in ${}_{}{}^{73}{}_{}{}^{}\mathrm{Rb}$ to the ground state of ${}_{}{}^{72}{}_{}{}^{}\mathrm{Kr}$. Combining this measurement with a Coulomb displacement energy calculation yields a mass excess for ${}_{}{}^{73}{}_{}{}^{}\mathrm{Sr}$ of -31.82±0.24 MeV based on a predicted mass for ${}_{}{}^{72}{}_{}{}^{}\mathrm{Kr}$ of -53.94±0.24 MeV.

• Received 19 July 1993

DOI:https://doi.org/10.1103/PhysRevC.48.2593