The spectroscopy of ${}^{67}\mathrm{Zn}$ has been investigated via the fusion-evaporation reaction ${}^{64}\mathrm{Ni}({}^{12}\mathrm{C}$, $2\alpha 1n){}^{67}\mathrm{Zn}$. Three collective bands are established. The observation of strong $E1$ transitions and the well-behaved rotational sequence suggest the new negative-parity band built on the $15/2^{-}$ state is an octupole rotational band. The octupole characteristics of ${}^{67}\mathrm{Zn}$ is well described by the newly developed semimicroscopic cluster model. Systematics of the excitation energies of the $3^{-}$ state in even-even Zn isotopes and observation of an octupole rotational band in odd-$A$ ${}^{67}\mathrm{Zn}$ indicate that the strong octupole effects occur around neutron number 38 in Zn isotopes.

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• Collective levels
• Fusion evaporation reactions
• High spin states
• Nuclear shapes and moments
• Nuclear structure & decays
• Transfer reactions
• 59 ≤ A ≤ 89
• Collective models