Low-lying energy states of the odd-odd ${}^{60-66}Cu$ isotopic chain are studied within the framework of interacting boson-fermion-fermion model (IBFFM-1) and the neutron-proton interacting boson-fermion-fermion model (IBFFM-2). The obtained results compare well with the available experimental data and IBFFM-1, which augment the reliability of the wave function and Hamiltonian applied within the IBFFM-2 model. The ground-state phase transitions in Cu odd-A and odd-odd nuclei are investigated. Some signs of shape-phase transitions are seen in odd-odd nuclei. The obtained results indicate that the spectra of these isotopes similar to Cu odd-A nuclei provide good examples of vibrational symmetry without any significant deformed gamma-unstable structure. So, well known properties in the odd mass nuclei persist also in the odd-odd mass system. The calculations reproduce this behavior.

低奇数的低能态 ${}^{60-66}Cü$在相互作用玻色子-费米子-费米子模型（IBFFM-1）和中子-质子相互作用玻色子-费米子-费米子模型（IBFFM-2）的框架内研究了同位素链。获得的结果与可用的实验数据和IBFFM-1进行了很好的比较，从而增加了在IBFFM-2模型中应用的波动函数和哈密顿量的可靠性。研究了Cu奇数A和奇奇数原子核中的基态相变。在奇核中可以看到一些形状-相变的迹象。所获得的结果表明，这些与铜奇数A原子核相似的同位素的光谱提供了振动对称性的良好实例，而没有任何明显的变形的γ不稳定结构。因此，奇数质量核中的众所周知的性质在奇数质量系统中也保持不变。计算会重现此行为。