Signature of a possible $\alpha$-cluster state in $N=Z$ doubly-magic ${}^{56}$Ni

S. Bagchi, H. Akimune, J. Gibelin +36

An inelastic $\alpha$-scattering experiment on the unstable $N=Z$, doubly-magic ${}^{56}$Ni nucleus was performed in inverse kinematics at an incident energy of 50 A.MeV at GANIL. High mu…