Neutral AtomSingly Ionized Atom
Finding listPeriodic TableAtomic DataStrong LinesNeutral Atom Persistent Lines Neutral Atom Energy LevelsSingly Ionized Persistent LinesSingly Ionized Energy LevelsReferences

Persistent Lines of Singly Ionized Helium ( He II )

 Int  Wavelength    Aki        Energy             Line  Aki
         (Å)     (108s-1)      Levels (cm-1)      Ref.  Ref.

 
 300    256.3166 26.77        0.0000-390142.5605 MK00b BM00
 150    256.3177 26.77        0.0000-390140.8250 MK00b BM00
1000    303.7804 100.27       0.0000-329185.1511 MK00b BM00
 500    303.7858 100.28       0.0000-329179.2940 MK00b BM00
 120   1640.3321  8.624  329179.2940-390142.5576 MK00b BM00
  50   1640.3447  3.593  329179.7623-390142.5605 MK00b BM00
   7   1640.3750  0.337  329179.2940-390140.9646 MK00b BM00
  25   1640.3914  3.594  329179.7623-390140.8250 MK00b BM00
 180   1640.4742 10.35   329185.1511-390143.1361 MK00b BM00
  25   1640.4897  1.725  329185.1511-390142.5576 MK00b BM00
  15   1640.5326  0.674  329185.1511-390140.9646 MK00b BM00
   4   4685.3769  0.939  390140.8250-411477.8537 MK00b BM00
   3   4685.4072  0.491  390140.9646-411477.8550 MK00b BM00
  15*  4685.7038  2.060  390142.5576-411478.0973 MK00b BM00
  15*  4685.7044  1.126  390142.5605-411478.0978 MK00b BM00
  12   4685.8041  2.207  390143.1361-411478.2193 MK00b BM00