评N.~“类氖离子从Cu到Ga的能级和辐射率”Singh和S.~ Aggarwal [Pramana -- J. Phys. 89（2017）79]
Comment on "Energy levels and radiative rates for Ne-like ions from Cu to Ga" by N.~Singh and S.~Aggarwal [Pramana -- J. Phys. 89 (2017) 79]
摘要：
最近，N.~ Singh和S.~ Aggarwal [Pramana-J. Phys. 89（2017）79]报道了三种类Ne离子，即Cu~XX，Zn~XXI和Ga~XXII的127个能级的能量和寿命。为了计算，他们采用了两种独立的原子结构代码，即GRASP和FAC，并得出结论，这两种代码给出了可比的能量。然而，我们发现，这两组能量之间的差异是高达1.5~Ryd（超过1.6 $\times$ 10 $^5$波数）的许多水平，并为所有三个离子。在缺乏其他可用的理论或实验数据的情况下，很难知道哪一组能量更准确。通过我们使用相同代码的计算，我们证明了FAC计算中的列表是不正确的。还突出显示了在其列表结果中注意到的一些异常。
英文摘要：
Recently, N.~Singh and S.~Aggarwal [Pramana -- J. Phys. 89 (2017) 79] have reported energies and lifetimes for 127 levels of three Ne-like ions, namely Cu~XX, Zn~XXI and Ga~XXII. For the calculations they have adopted two independent atomic structure codes, i.e. GRASP and FAC, and have concluded that both codes give comparable energies. However, we find that the differences between the two sets of energies are up to 1.5~Ryd (over 1.6$\times$10$^5$ wavenumbers) for many levels, and for all three ions. In the absence of other available theoretical or experimental data, it becomes difficult to know which set of energies is more accurate. Through our calculations with the same code we demonstrate that their listings from the FAC calculations are incorrect. A few more anomalies noted in their tabulated results are also highlighted.
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