Transition-Event Durations in One Dimensional Activated Processes
  Despite their importance in activated processes, transition-event durations -- which are much shorter than first passage times -- have not received a complete theoretical treatment. We therefore study the distribution of durations of transition events over a barrier in a one-dimensional system undergoing over-damped Langevin dynamics. 
Bin W. Zhang, David Jasnow and Daniel M. Zuckerman