reaccelerated

Reaccelerated is the past participle of reaccelerate, describing something that has gained velocity again after an initial deceleration or energy loss. The term is used in physics and related fields to indicate that a particle, object, or flow has undergone a renewed boost in momentum after a period of slowing.

In particle physics and astrophysics, reacceleration is a common concept. Beams of charged particles may be reaccelerated after partial energy losses due to interactions with matter or radiation, allowing them to reach or maintain target energies for experiments or therapies. In astrophysical contexts, populations of relativistic particles can be reaccelerated by shocks, turbulence, or compressions, producing renewed emission. Mechanisms such as diffusive (second-order) Fermi acceleration or diffusive shock acceleration are invoked to explain reaccelerated particles in environments like supernova remnants and galaxy clusters.

In spaceflight and engineering, reacceleration can refer to renewed increases in velocity achieved by propulsion, gravity assists, or aerodynamic forces after maneuvers or drag, enabling longer trajectories or higher arrival speeds.

In everyday language, reaccelerated simply means that something has regained speed after slowing down, as in fluids, vehicles, or mechanical systems.

Related concepts include acceleration, particle accelerators, diffusive shock acceleration, and Fermi acceleration.