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Lanthanide
Actinide
Superactinide
Ion of Plutonium, Z=94, I.P.=395000 cm-1
References:
Trakur L., Trakur A. // Indi J. Appl. Phys. - 1979 - Vol 17 - P. 538-540.
Trakur L., Trakur A. // Indi J. Appl. Phys. - 1979 - Vol 17 - P. 538-540.