Geoscience Reference
In-Depth Information
a
b
c
d
Experimental and theoretical AI rate constants of reaction Na
*
(
n
eff
,
l
)
Fig. 1.15
C
Na under the
n
eff
< 20: (
a
)
k
†
,
l
crossed atomic beam condition for
T
D
600 K and 8
D
0 case is denoted
by dots; (
b
)
k
†
,
l
2 is shown by
perfect squares
;(
c
)
open circles
represent the
k
cb
,
l
D
D
0 case;
(
d
)
open squares
indicate
k
cb
,
l
D
2 case;
full curves
give the stochastic theory results
total constants k
AI
C
k
PI
and branching factor
D
AI
=.
AI
C
PI
/ calculations
for the chemoionization Na(
n
2
P)
C
Na process as a function of
n
eff
are presented in
Fig.
1.16
.
Comparison of the calculated and experimental data for AI and PI cross sections
in the collisions of resonantly excited Rb(5
2
P
3/2
) atoms and atoms of rubidium
in the
2
Sand
2
D Rydberg states was carried out by Barbier et al. (
1987
).
The calculation of the total autoionization width of the excited quasi-molecule
(
R
)
D
dir
(
R
)
C
rev
(
R
) takes into account two possible ionization channels: a
“direct” one (with the detachment of an electron of the highly excited atom) and a
“reverse” one (with exchange of electrons of excited atoms). Table
1.6
shows the
values
k
PI
and
k
AI
at
T
D
450 K.
