Energy levels, radiative rates and lifetimes are reported for the lowest 139 levels of three Ne-like ions, namely Cu XX, Zn XXI and Ga XXII. These levels mostly belong to the 2s${}^2$2p${}^6$, 2s${}^2$2p${}^{5}3\ell$, 2s2p${}^{6}3\ell$, 2s${}^2$2p${}^{5}4\ell$, 2s2p${}^{6}4\ell$, and 2s${}^2$2p${}^{5}5\ell$ configurations. For the calculations the general-purpose relativistic atomic structure package (GRASP) has been adopted. Comparisons are made with earlier available theoretical and experimental results, particularly among the lowest 27 levels of the 2s${}^2$2p${}^6$ and 2s${}^2$2p${}^{5}3\ell$ configurations. Due to paucity of similar data for higher lying levels, analogous calculations have also been performed with the flexible atomic code (FAC). These calculations help in assessing the accuracy of our calculated results, especially for the energy levels.

据报道，三种Ne样离子（Cu XX，Zn XXI和Ga XXII）的最低139能级的能级，辐射速率和寿命。这些级别主要属于2s${}^2$2p${}^6$，2秒${}^2$2p${}^{5}3\ell$，2s2p${}^{6}3\ell$，2秒${}^2$2p${}^{5}4\ell$，2s2p${}^{6}4\ell$和2秒${}^2$2p${}^{5}5\ell$配置。为了进行计算，采用了通用相对论原子结构软件包（GRASP）。与早期可用的理论和实验结果进行了比较，特别是在2s的最低27个水平之间${}^2$2p${}^6$ 和2秒${}^2$2p${}^{5}3\ell$配置。由于缺乏较高水平的相似数据，因此还使用弹性原子代码（FAC）进行了类似的计算。这些计算有助于评估我们计算结果的准确性，尤其是对于能量水平而言。