By Murray J McEwan
ISBN-10: 0470583932
ISBN-13: 9780470583937
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Sample text
H20 (37) led to laboratory studies of the rates and equilibria of clustering reactions for water molecules and positive ions. A theory to account for the presence of these ion clusters was later proposed by Fehsenfeld and Ferguson6 , as discussed in Chapter 6 . A s anothe r example, Evans e t a/. 27 µm in the dayglow. From the intensity of this emission an estimate of the concentration of Oi(1 Ag) was made, and the result turned out to be unexpectedly large. Subsequently the high concentration of 02( 1 Ag) was used to account for the observed 02 + con centration in the D region 8 , by attributing formation of 02 + to photo ionization of 02( 1 A8) .
The small sampling leak L leads, via the mass spectrometer ion source S, to a diffusion pump D. In later versions of the apparatus jet J is replaced by a small sphere with six 0. 1 mm holes, and the jet is moved by an external magnet operating on an iron slug. Fig. 5 LABOR A TOR Y STUDIES 45 mixed with a large excess of argon or helium, through a microwave dis charge, and then observed the ensuing reaction of the atoms with 0 3 • The progress of the reaction was followed by monitoring the decrease in the 0 3 concentration, as indicated by the height of the peak at mass 48 , as a function of reaction time .
H20 (37) led to laboratory studies of the rates and equilibria of clustering reactions for water molecules and positive ions. A theory to account for the presence of these ion clusters was later proposed by Fehsenfeld and Ferguson6 , as discussed in Chapter 6 . A s anothe r example, Evans e t a/. 27 µm in the dayglow. From the intensity of this emission an estimate of the concentration of Oi(1 Ag) was made, and the result turned out to be unexpectedly large. Subsequently the high concentration of 02( 1 Ag) was used to account for the observed 02 + con centration in the D region 8 , by attributing formation of 02 + to photo ionization of 02( 1 A8) .
Chemistry of the atmosphere by Murray J McEwan
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