Abstract
From measurements of the absolute concentrations of vibrationally excited oxygen produced in levels
v"
= 4 to
v"
= 13, it is concluded that
ca
. 20 % of the exothermicity of the reaction O(
3
P) + NO
2
→ NO + O
+
2
(
v"
≤11) (1) appears initially as vibrational energy in oxygen. Vibrationally excited nitric oxide (
v"
= 1, 2) is also observed and may be produced in this reaction or in the primary process NO
2
+
hv
→ NO (
v"
≤ 2) + O(
3
P). More highly excited oxygen (
v"
≤ 15), with energy exceeding the exothermicity of the reaction, is produced in reaction (1) when the NO
2
is first excited by radiation above the dissociation limit near 400 nm. The excited NO
2
thus produced can also transfer energy to nitric oxide. NO
2
*
+ NO(
v"
= 0) → NO
2
+ NO(
v"
= 1).
Cited by
2 articles.
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