Decay of multiply excited Rydberg ions produced in I10+-rare-gas collisions

We have measured the branching ratios for the decay of multiply excited Rydberg ions produced in slow I10+-Ne, Ar, Kr and Xe collisions by using the coincidence method. The multi-Rydberg ions are stabilized through radiative or Auger decay. We report target dependence of the branching ratios after two to five electron transfers.