Abstract
We simulate the Coulomb explosion patterns for swift H 2 + ions penetrating through solids by solving the motion equations. The forces acting on the individual H + fragments are given by the stopping force and the dynamic interacting force. With the plasmon-pole approximation (PLA) dielectric function, the linear-response dielectric theory is used to determine the dynamic interacting force. The initial directions of the molecular axis with respect to the beam direction are assumed to be random. It is found that due to the dynamic-interaction effects, the molecular axes tend to align to the beam direction and the energy losses of the trailing ions are larger than that of the leading ions.
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