We investigated the predissociation dynamics from the [
2
Π
1/2
]
c
5d; 0
g
+
and
[
2
Π
3/2
]
c
6d; 0
g
+
Rydberg states of Br
2
using the velocity map imaging technique. Two-dimensional scattering
images of the fragmented Br
+
exhibited an isotropic feature
upon the excitation of these Rydberg states. Analysis of the total
kinetic energy release suggested the existence of the predissociation
pathways to the dissociation limits of Br(5s,
4
P
3/2
) + Br(4p,
2
P
3/2
) and Br(5s,
4
P
5/2
) + Br(4p,
2
P
3/2
)
via
the 0
g
+
ion-pair
states that interact with the lower and/or excited-core Rydberg states
lying at long internuclear distance regions thorough the avoided crossing.
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