Hi Hisaya,

   the SetDefinition method of G4DynamicParticle looks like this:

inline void G4DynamicParticle::SetDefinition(G4ParticleDefinition *
aParticleDefinition)
{
  theParticleDefinition = aParticleDefinition;
  theDynamicalMass = theParticleDefinition->GetPDGMass();
}

Can you make it such that it also sets theDynamicalCharge to the PDG Charge.
(From what I see, the ion energy loss in low energy seems to always use
this variable, of course also for alpha, t and d; which then is never set.
This means they fly forever without energy loss....)

I know at present of two groups that ran into this problem.