Environmental Engineering Reference
In-Depth Information
where
A
is an excited atomic state and two stars denote an autodetaching state.
The electronic states for this process are given in Figure 2.16, where the autoion-
izing state of a molecule corresponds to repulsion of colliding particles and has a
form different from that in Figure 2.13, and the final state of the process relates to
the electron release. At distances between nuclei
R
R
c
,therelevantstateof
AB
is an autoionizing state, and the decay of this state leads to electron release. The
other process of this group is destruction of a negative ion in collision with atoms
<
Figure 2.16
The character of molecular electronic states which determine the processes of
dissociative recombination and associative ionization.
Figure 2.17
The character of molecular electronic states which determine the process of excita-
tion of vibrational levels by electron impact through an autodetachment state.
