Dissociative electron attachment to the unstable carbon ...

Dissociative electron attachment to CS 4
Electron Energy (eV)
12
10
8
6
4
2
0
O - S - CS - S 2
-
(a)
log(Counts)
2.5
2
1.5
1
0.5
0
2000 2500 3000 3500 4000 4500 5000 5500
Time-of-Flight (ns)
Electron Energy (eV)
10
9
8
7
6
C - O - S - CS - S 2
-
CS 2
-
(b)
log(Counts)
3
2.5
2
1.5
1
0.5
0
5
4
2000 2500 3000 3500 4000 4500 5000 5500
Time-of-Flight (ns)
Figure 2. Dissociative electron attachment spectra of CS 2 . The horizontal axes are
the times-of-flight of the ions and vertical axes show the incident electron energy.
(a) (Top) Dissociative electron attachment bands in CS 2 . At 0 eV 35 Cl − and 37 Cl −
are visible from DEA to residual CCl 4 .
(b) (Bottom) CS 2 attachment bands at 6.2, 7.7 and ∼ 9 eV. Also visible is O −
from DEA to residual water and CS − 2 formed in secondary processes.
of two close resonances at 3.35 and 3.65 eV [21]. The ions CS − and S − 2 are produced
at 6.2 eV and C − is formed at 6.5 and 7.7 eV. Dissociative electron attachment to
electronically excited CS 2 in its ˜B 1 B 2 state gives S − at 0.5 eV and CS − at 1.2 eV [24].
Disociative electron attachment spectra of CS 2 measured here are shown in figures
2, 3 and 4. Figures 2 (a) and (b) show 2-dimensional plots of the anion intensity versus