Chemistry Reference
In-Depth Information
TABLE 3.4
Selected Atomic Transitions in Helium, Argon, Hydrogen, and Oxygen
λ
Intensity
E
L
E
H
A
Atom
[Å]
[a.u.]
[eV]
[eV]
Transition
J
[10
8
s
−1
]
He
3888.648
5.000
19.82
23.01
2s
3
S-3p
3
P
0
1-2, 1, 0
0.09478
±
1%
Ar
7503.8685
700
11.83
13.48
4s
1
P
1
-4p
1
S
0
1-0
0.472
±
25%
Ar
7635.1056
500
11.55
13.17
4s
3
P
2
-4p
1
D
2
2-2
0.274
±
25%
H
α
6562.86
2p
2
P
1
/
2,3
/
2
-3s
2
S
1
/
2
H
α
6562.81
2p
2
P
1
/
2,3
/
2
-3pD
3
/
2,5
/
2
H
α
6562.74
2s
2
S
1
/
2,3
/
2
-3pP
1
/
2,3
/
2
O
7775.388
26
2-1
O
7774.166
27
9.14
10.47
3s
5
S
0
-3p
3
P
2-2
0.34
±
10%
O
7771.934
28
2-3
O
8446.758
29
1-1
O
8446.359
30
9.52
10.99
s
3
S-3p
3
P
1-2
O
8446.250
27
1-0
Source:
Striganov, A.R. and Sventitskii, N.S.,
Tables of Spectral Lines of Neutral and Ionized Atoms
,
IFI/Plenum, New York, 1968.
20
+
+
H
2
(
Χ
2
Σ
g
1sσ)
H
2
(
D
΄
1
Π
u
4pπ)
H
2
(
D
1
Π
u
3pπ)
+
H
2
(
B
΄
1
Σ
u
3pσ)
15
1
Π
u
2pπ)
H
2
(
C
+
H
2
(α
3
Σ
g
2pσ)
+
1
Σ
g
2pσ + 2pσ
2
)
H
2
(
E
,
F
+
1
Σ
u
2pσ)
H
2
(
B
8
+
H
2
(
b
3
Σ
u
2pσ)
6
H
2
4
1
Σ
g
1sσ)
+
H
2
(
X
2
0
0
1 2
Internuclear distance (Angstrom)
3
4
5
6
FIGURE 3.13
Energy level diagram of the hydrogen molecule. (Data from Schmoranzer, H.
and Zietz, R.,
Phys.Rev.A
, 18, 1472, 1978.)
