Excited states in ⁵⁶Zn were populated following one-neutron removal from a ⁵⁷Zn beam impinging on a Be target at intermediate energies in an experiment conducted at the Radioactive Isotope Beam Factory at RIKEN. Three γ rays were observed and tentatively assigned to the $6^{+}\to 4^{+}\to 2^{+}\to 0^{+}$ yrast sequence. This turns ⁵⁶Zn into the heaviest $T_z=-2$ nucleus in which excited states are known. The excitation-energy differences between these levels and the isobaric analogue states in the $T_z=+2$ mirror partner, ⁵⁶Fe, are compared with large-scale shell-model calculations considering the full pf valence space and various isospin-breaking contributions. This comparison, together with an analysis of the mirror energy differences in the $A=58$, $T_z=\pm 1$ pair ⁵⁸Zn and ⁵⁸Ni, provides valuable information with respect to the size of the monopole radial and the isovector multipole isospin-breaking terms in the region above doubly-magic ⁵⁶Ni.

在 RIKEN 的放射性同位素束工厂进行的一项实验中，⁵⁶ Zn 的激发态在从以中间能量撞击 Be 靶的⁵⁷ Zn 束中去除一个中子后填充。观测到3 条γ射线，并暂定为$6^{+}\to 4^{+}\to 2^{+}\to 0^{+}$yast 序列。这将⁵⁶ Zn 变成最重的${吨}_z=-2$已知激发态的原子核。这些能级与等压类似态之间的激发能量差异${吨}_z=+2$考虑到完整的pf价空间和各种同位旋破坏贡献，将镜像伙伴⁵⁶ Fe 与大规模壳模型计算进行了比较。这种比较，连同对镜面能量差异的分析$\mathrm{一种}=58$, ${吨}_z=\pm 1$⁵⁸ Zn 和⁵⁸ Ni对提供了关于单极子径向大小和等向量多极子同位旋破坏项的有价值的信息，在双幻⁵⁶ Ni之上的区域中。