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Sugar和Reader根据光谱数据,半经验地计算了镧系元素的第一、二、三、四、五电离势,但是由于缺乏必要的光谱数据,使进一步的计算遇到了困难。近来,Sinha使用了斜体W规则计算了镧系元素的第六及其更高的电离势。我们根据前面工作铂中得到的T值与4f电子数N之间的线性关系,根据从光谱数据得到的能级间能量间隔SD、△E的规律性,以及光谱
Based on the spectral data, Sugar and Reader calculated the first, second, third, fourth and fifth ionization potentials of the lanthanides semi-empirically, but further computations were difficult due to the lack of necessary spectral data. Recently, Sinha used the italic W rule to calculate the sixth and higher ionization potentials of lanthanides. Based on the linear relationship between the T value obtained in Platinum and the 4f electron number N in the previous work and based on the regularity of the energy levels SD and ΔE obtained from the spectral data and the spectral