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Lanthanide
Actinide
Superactinide
Ion of Seaborgium, Z=106, I.P.=0.28 cm-1
References:
Lackenby B. et al. // Phys. Rev. A - 2019 - Vol. 99 - P. 042509.
Dzuba A. // Phys. Rev. A - 2016 - Vol. 93 - P. 032519.
Îãàíåñÿí Þ.Ö., Äìèòðèåâ Ñ.Í. // Óñïåõè õèìèè - 2009 - Ò. 78, ¹ 12 - Ñ. 1165-1176.