Ge*

The electromagnetic properties of low-lying states in ⁷⁴Ge have been investigated using a multi-step Coulomb excitation measurement carried out at the ATLAS facility of the Argonne National Laboratory. The experimental setup consisted of the GRETINA multidetector array coupled to the heavy-ion counter, CHICO2. This coupling allowed for precise Doppler correction and clean kinematic separation of the scattered particles. The quadrupole collectivity and triaxiality of the ground-state and quasi-gamma bands -- which were Coulomb excited to spins 8⁺ and 4⁺, respectively -- have been investigated in the framework of the generalized triaxial rotor model and the spherical shell model. Preliminary results from the analysis will be presented in the context of similar studies performed for the neighboring ^72,76Ge [1,2] nuclei.

[1] A. D. Ayangeakaa, et. al. PLB 754, 254-259 (2016)

[2] A. D. Ayangeakaa, et. al. PRL 123, 102501 (2019)