Index | Element | I.S. |  Z  | Conf. | Level | ¡÷E (eV) | Method | Ref. | |
1 | Gd | Gd | 64 | 4F75S25P65D6S2 | 9D2 | 6.14094 | 1.4E-02 | COMP | R400 |
2 | Gd | Gd | 64 | 6.16 | COMP | R406 | |||
3 | Gd | Gd | 64 | 6.162 | 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