Energy Levels of Neutral Helium ( He I )
Configuration Term J Level(cm-1) Ref.
1s2 1S 0 0.000 M02
1s2s 3S 1 159855.9745 M02
1s2s 1S 0 166277.4403 M02
1s2p 3P° 2 169086.7666 M02
1s2p 3P° 1 169086.8430 M02
1s2p 3P° 0 169087.8309 M02
1s2p 1P° 1 171134.8970 M02
1s3s 3S 1 183236.7918 M02
1s3s 1S 0 184864.8294 M02
1s3p 3P° 2 185564.5620 M02
1s3p 3P° 1 185564.5840 M02
1s3p 3P° 0 185564.8547 M02
1s3d 3D 3 186101.5463 M02
1s3d 3D 2 186101.5488 M02
1s3d 3D 1 186101.5930 M02
1s3d 1D 2 186104.9668 M02
1s3p 1P° 1 186209.3651 M02
1s4p 1P° 1 191492.7120 M02
He II (2S1/2) Limit 198310.6691 M02