Index | Element | I.S. |  Z  | Conf. | Level | ¡÷E (eV) | Method | Ref. | |
1 | Ca | H | 20 | 1S | 5469.9 | +4.E-2 | THR | R8 | |
2 | Ca | H | 20 | 1S | 2S1/2 | 5469.881 | COMP | R400 | |
3 | Ca | H | 20 | 1S | 2S1/2 | 5469.906 | 1.3E-2 | COMP | R401 |
4 | Ca | H | 20 | 1S | 2S1/2 | 5469.88 | 0.02 | COMP | R403 |
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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