Zn*

Medium and high-spin states in ⁶⁶Zn were investigated by means of the complex multinucleon transfer reaction ²⁶Mg(⁴⁸Ca, α4nγ) at beam energies of 275, 290 and 320 MeV. The experiment was performed in inverse kinematics at the ATLAS facility at Argonne National Laboratory using the Gammasphere spectrometer and the fragment mass analyzer (FMA). A high-spin, quasi-rotational-like band consisting of stretched-E2 transitions was observed in coincidence with the known low-spin structure of mostly single-particle character. However, due to fragmentation, the two structures could thus far not be linked. A general discussion, complemented by theoretical calculations, of the observed structures will be presented within the context of shell structure evolution and collectivity in the A ∼ 60 mass region [1-3].

[1] M. Albers, et. al. PRC 88, 054314 (2013)

[2] A. D. Ayangeakaa, et. al. PRC 91, 044327 (2015)

[3] M. Albers, et. al. PRC 94, 034301 (2016)