Ion momentum imaging study of the ion-molecule reaction Ar + O → Ar + O
Charge exchange reactions between Ar + ( 2 P) and O 2 (X 3 Σ − g ) are investigated in the collision energy range of 3.40-9.24 eV within the center-of-mass coordinate, by using the ion momentum imaging technique. The internal energy of the product O 2 + is enhanced gradually with the increase of col...
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| Published in | Physical chemistry chemical physics : PCCP Vol. 22; no. 8; pp. 464 - 4646 |
|---|---|
| Main Authors | , , , , |
| Format | Journal Article |
| Published |
26.02.2020
|
| Online Access | Get full text |
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| Summary: | Charge exchange reactions between Ar
+
(
2
P) and O
2
(X
3
Σ
−
g
) are investigated in the collision energy range of 3.40-9.24 eV within the center-of-mass coordinate, by using the ion momentum imaging technique. The internal energy of the product O
2
+
is enhanced gradually with the increase of collision energy, and the forward-scattered O
2
+
ions are distributed in the broader range of scattering angle at higher collision energies. At the low collision energy of 3.40 eV, the resonant charge transfer, similar to a photon ionization process, leads to the Franck-Condon-like vibrational state population of O
2
+
at the a
4
Π
u
state. At the higher collision energies, besides a
4
Π
u
and the high-lying states that are visible in the photoionization process, the O
2
+
products could be populated at some electronically bound states in the non-Franck-Condon region. The present observations indicate again the strong collision-energy dependences of the charge exchange reactions, but distinctly different from our previous findings for Ar
+
+ NO → Ar + NO
+
.
O
2
+
products of the charge exchange reactions between Ar
+
and O
2
are distributed in the wider range of scattering angle at higher collision energy. |
|---|---|
| ISSN: | 1463-9076 1463-9084 |
| DOI: | 10.1039/c9cp06289k |