Chemistry Reference
In-Depth Information
1.0
π
*
O
2
0.8
O1s
-1
2
−
Σ
0.6
4
−
Σ
0.4
σ
*+Ry
0.2
A
B
C
0.0
530
535
540
545
Photon Energy (eV)
Figure 12.
Soft X-ray absorption spectra of O
2
at the O 1s excitation and ionization region.
O
2
2
-
(D)
Σ
O1s ionized states
-
4
Σ
(Q)
1s-
σ
*(Q)
O1s excited states
Figure 13.
Schematic po-
tential energy curves for the O
1s
→
π
∗
and
σ
∗
excited states in
O
2
. The
σ
∗
states and ionized states
show exchange splittings. The
σ
∗
states are approximately regarded
as the quartet (Q) and doublet (D)
ion cores plus the
σ
∗
electron. In-
teraction with Rydberg states is
neglected.
FC
1s
-
σ
*
(D)
1s
-
π
*
bond length
