Dynamical effects in barrier crossing—The Kramers model

4 Dynamical effects in barrier crossing—The Kramers model 

The Arrenius expression for the rate of a unimolecular reaction, k = K np —E /kaT), expresses the rate in terms ofthe activation energy JTb and a preexponential coefficient k. The activation energy reflects the height of the barrier that separates the reactant and product configurations. The equilibrium-based analysis of Section 14.3.3 emphasizes the fact that the potential experienced by the 

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