Range-energy relation for Au ions,E/A≤150MeV

The range-energy (RE) relations for Au ions in CH and Au in the energy interval 10{≤}E/A{≤}150 MeV are reported. Bevalac beams of Au⁶¹⁺, Au³⁵⁺, and Au¹¹⁺ at E/A=50 MeV were used to investigate the dependence of dE/dx, hence effective charge z*, of Au ions in matter as a function of target material and initial charge of incident Au ions. The essential finding of this experiment is that the measured ranges of the Au ions are typically within 2% of those predicted by the Barkas-Berger RE relation. The experimental RE relations for Au in CH and Au can also be reproduced with equal precision by assuming that dE/dx is given by the product of the rate of energy loss for protons and an empirically derived expression for z*2, each quantity being dependent on the target material, via the adjusted ionization potential Iadj and the velocity {β} of the ion.