SEARCH Articles Figures Tables Collision dynamics time-dependent perturbation Collision relaxation time Collision time scale Collision time-dependent Collision times three-body collisions Drift Time (or Collision Cross Section) in Ion-Mobility Separation Drude collision time Effective collision time Finite collision time First collision time Free Path and Mean Time Between Collisions Impact processes with finite collision time Mean collision time Mean time between collisions Population balance collision time Time between collisions Timing collisions