Helium (He)
Energy Levels of Singly Ionized Helium ( He II )
Configuration
Term
J
Level(cm
-1
)
Ref.
1
s
2
S
1/2
0.0000
MK00b
2
p
2
P°
1/2
329179.2940
MK00b
3/2
329185.1511
MK00b
2
s
2
S
1/2
329179.7623
MK00b
3
p
2
P°
1/2
390140.8250
MK00b
3/2
390142.5605
MK00b
3
s
2
S
1/2
390140.9646
MK00b
3
d
2
D
3/2
390142.5576
MK00b
5/2
390143.1361
MK00b
4
p
2
P°
1/2
411477.1228
MK00b
3/2
411477.8550
MK00b
4
s
2
S
1/2
411477.1818
MK00b
4
d
2
D
3/2
411477.8537
MK00b
5/2
411478.0978
MK00b
4
f
2
F°
5/2
411478.0973
MK00b
7/2
411478.2193
MK00b
He
Limit
438908.8789
MK00b