Index | Element | I.S. |  Z  | Conf. | Level | ¡÷E (eV) | Method | Ref. | |
1 | B | He | 5 | 1S2 | 259.377 | COMP | R1 | ||
2 | B | He | 5 | 1S2 | 259.38 | THR | R8 | ||
3 | B | He | 5 | 1S2 | 259.38 | +2.6E-1 | SEMP | R42 | |
4 | B | He | 5 | 1S2 | 1S0 | 259.37521 | COMP | R400 | |
5 | B | He | 5 | 1S2 | 1S0 | 259.368 | COMP | R325 |
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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