NIST Physical Measurement Laboratory Handbook of Basic Atomic Spectroscopic Data

[skip navigation] National Institute of Standards and Technology NIST Physical Measurement Laboratory Helium (He) 

Homepage - IntroductionFinding listSelect element by name.Select element by atomic number.Select element from periodic tableHelium Atomic DataHelium Strong LinesHelium Neutral Atom Persistent LinesHelium Neutral Atom Energy LevelsHelium Singly Ionized Persistent LinesHelium Singly Ionized Energy LevelsHelium References
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Energy Levels of Neutral Helium ( He I )

  Configuration   Term   J   Level(cm-1)   Ref. 
              
1s21S0     0.000M02
     
1s2s3S1159855.9745M02
     
1s2s1S0166277.4403M02
     
1s2p3P°2169086.7666M02
  1169086.8430M02
  0169087.8309M02
     
1s2p1P°1171134.8970M02
     
1s3s3S1183236.7918M02
     
1s3s1S0184864.8294M02
     
1s3p3P°2185564.5620M02
  1185564.5840M02
  0185564.8547M02
     
1s3d3D3186101.5463M02
  2186101.5488M02
  1186101.5930M02
     
1s3d1D2186104.9668M02
     
1s3p1P°1186209.3651M02
     
1s4p1P°1191492.7120M02
     
He II (2S1/2)Limit 198310.6691M02
     


Homepage - IntroductionFinding listSelect element by name.Select element by atomic number.Select element from periodic tableHelium Atomic DataHelium Strong LinesHelium Neutral Atom Persistent LinesHelium Neutral Atom Energy LevelsHelium Singly Ionized Persistent LinesHelium Singly Ionized Energy LevelsHelium References
Switch to ASCII Version