Index | Element | I.S. |  Z  | Conf. | Level | ¡÷E (eV) | Method | Ref. | |
1 | Eu | Eu | 63 | 4F75S25P66S2 | 8S7/2 | 5.67104 | 9.9E-03 | COMP | R400 |
2 | Eu | Eu | 63 | 5.64 | COMP | R406 | |||
3 | Eu | Eu | 63 | 5.67 | COMP | R407 |
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'I.S.' ---------- the isoelectronic sequence
'Z' ---------- atomic number
'Conf.' ---------- configuration
'Level' ---------- the notation of energy level
'E' ---------- the ionization potential
'¡÷E' ---------- error for ionization potential
'Method' ---------- the method by which the data is produced
'Ref.' ---------- the reference