Excited 0+ states in 62Zn populated via the 64Zn(p,t)62Zn reaction

A search for excited ${0}^{+}$ states in ${}^{62}$Zn was conducted via the ${}^{64}$Zn($p,t$)${}^{62}$Zn reaction. Four such states in ${}^{62}$Zn were observed up to an excitation energy of 5.4 MeV. The measured angular distribution for the previously assigned ${0}_{2}^{+}$ state at 2342 keV is consistent with a ${2}^{+}$ assignment, and thus the first excited ${0}^{+}$ state is now assigned at 3043 keV. Due to the energy scaling in the currently adopted formalism for isospin-mixing corrections in superallowed Fermi $\ensuremath{\beta}$ decay, ${\ensuremath{\delta}}_{C1}$ for ${}^{62}$Ga is reduced by nearly a factor of two. This result shifts the theoretical value closer to previous experimental determinations of the same quantity through ${}^{62}$Ga superallowed $\ensuremath{\beta}$-decay branching-ratio measurements.