Co*

An extensive study of the level structure of ⁶²Co has been performed following a complex multinucleon transfer reaction ²⁶Mg( ⁴⁸Ca, 2α3npγ) ⁶²Co at beam energies of 275, 290 and 320 MeV. The combination of the Gammasphere array, the Fragment Mass Analyzer (FMA) and a focal-plane ionization chamber was used to identify and delineate excited levels in ⁶²Co. As a result, the ⁶²Co level scheme was considerably extended. Based on angular distribution measurements and DCO ratios, various level sequences built upon states of single-particle character were observed. An interpretation of these structures in the framework of the shell model will be presented and the evolution of collectivity in the A ∼ 60 region will be highlighted against the backdrop of the recently observed signatures of collectivity in ^62,63Ni [1, 2] and ⁶¹Co [3].

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

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

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