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Abstract
| We propose to probe shape coexistence in $^{80}$Zn, located along the N = 50 shell closure and only two protons away from the doubly-magic $^{78}$Ni nucleus, by searching, in particular, for the 0$^{+}$$_{2}$ excited state. The latter is predicted by shell-model calculations at 2.15 MeV, with sizable deformation originating from two-particle-two-hole excitations across the N = 50 shell gap. We intend to employ the $^{78}$Zn($\textit{t}$,$\textit{p}$), two-neutron-transfer reaction which will selectively favour the population of such neutron configurations. The experiment will be performed with the Isolde Solenoid Spectrometer, using a $^{78}$Zn beam at 6 MeVA impinging on a $^{3}$H radioactive target. The $^{80}$Zn excitation energy will be reconstructed through the detected energy and angle of emitted protons, whereas 0$^{+}$ states will be identified by measuring proton angular distributions with distinctive features of a ∆$\textit{L}$ = 0 transfer. |