Heavy‐ion beams have been considered as a driver for inertial confinement fusion. The interaction of the ion beam with a target plasma is of central importance. A number of studies on the heavy‐ion beam interaction with target plasma are found in the literature 1–4. Reported are the results of a numerical study of an effective charge and nonlinear corrections to the stopping power for heavy ions in plasma. It is important for heavy‐ion stopping that charge states of projectile ions are decided. The effective charge states of beam ions are supposed as Betz formula. It is shown that the stopping power is increased and the stopping range is shortened according to nonlinear effects. The heavy‐ion stopping is simulated at the various temperatures of the target plasma. The target heating of the ion beam and radiation effects are investigated. Energy is decreasing by the varying of the electric and magnetic fields in the target. It is considered to be a collective effect of stopping power. Though it is very small, in fact, there is the energy loss. Here it is shown that by using the PIC code. ©1996 American Institute of Physics.