Measurement of rate constants in processes of vibrational relaxation in mixtures of sulfur dioxide with noble gases

1984 ◽  
Vol 40 (1) ◽  
pp. 93-97
Author(s):  
P. V. Slobodskaya ◽  
E. N. Rityn'
Keyword(s):  
Sulfur Dioxide ◽  
Rate Constants ◽  
Vibrational Relaxation ◽  
Noble Gases

Singlet Methylene Removal Rate Constants from the (0,1,0) Vibrational Level: Enhancement via Complex-Mediated Vibrational Relaxation

2001 ◽  
Vol 215 (6) ◽  
Author(s):  
M.A. Buntine ◽  
G.J. Gutsche ◽  
W.S. Staker ◽  
M.W. Heaven ◽  
K.D. King ◽  
...  
Keyword(s):  
Vibrational Level ◽  
Rate Constants ◽  
Vibrational Relaxation ◽  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Removal Rate ◽  
Laser Flash ◽  
Laser Absorption ◽  
Photolysis Laser ◽  
Singlet Methylene

The technique of laser flash photolysis/laser absorption has been used to obtain absolute removal rate constants for singlet methylene,

The primary process in the photolysis of hexafluoroacetone vapour V. Mechanistic considerations

1968 ◽  
Vol 306 (1487) ◽  
pp. 541-551 ◽  
Keyword(s):  
Rate Constants ◽  
Vibrational Relaxation ◽  
Potential Surface ◽  
Singlet State ◽  
Primary Process ◽  
Kcal Mole ◽  
Unbounded Region ◽  
Do So ◽  
Single Potential

Data presented in the previous parts of this series are discussed in terms of the mechanism adopted for the primary process and it is noted that the data follow the general trends predicted by that mechanism. Five independent tests applied to the data indicate that the vibrational relaxation in the S 1 state occurs by a cascade of weak collisions; although the number of stages involved cannot be determined with precision, it is unlikely to exceed five. Rate constants are evaluated from the data for reactions (4) to (9). A reasonably reliable value of E 8 = 16 kcal/mole was obtained. The value of A s suggests that the decomposition from the trip let occurs along a single potential surface. This hypothesis is developed to suggest that molecules which decompose from the singlet state possibly do so via an unbounded region of the triplet surface.

Analytic solution of relaxation and dissociation of ozone and sulphur dioxide at low pressures

1981 ◽  
Vol 59 (17) ◽  
pp. 2569-2574 ◽  
Author(s):  
Wendell Forst
Keyword(s):  
Rate Constants ◽  
Sulphur Dioxide ◽  
Vibrational Relaxation ◽  
Analytic Solution ◽  
Thermal Dissociation ◽  
Relaxation Times ◽  
Average Energy ◽  
Collision Rate ◽  
Low Pressures ◽  
Good Agreement

The analytic solution of vibrational relaxation in a low-pressure gas is applied to the thermal dissociation of O3 in helium and of SO2 in argon. Use is made of experimental relaxation times to obtain average energy lost per collision. Calculated weak-collision rate constants are in very good agreement with experiment in the case of SO2, but only in fair agreement in the case of ozone. Several curious aspects of the ozone system, both experimental and theoretical, are discussed.

Vibrational relaxation rate constants for SF6 from thermal lensing studies

1987 ◽  
Vol 114 (3) ◽  
pp. 411-416 ◽  
Author(s):  
R.T. Bailey ◽  
F.R. Cruickshank ◽  
R. Guthrie ◽  
D. Pugh ◽  
I.J.M. Weir
Keyword(s):  
Relaxation Rate ◽  
Rate Constants ◽  
Vibrational Relaxation ◽  
Thermal Lensing
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