Calculated energy loss of swift light ions in platinum and gold: importance of the target electronic excitation spectrum

Understanding and predicting the energy loss of swift ions in metals is important for many applications charged particle beams, such as analysis modification materials, recently modelling metal nanoparticle radiosensitisation ion beam cancer therapy. We have calculated stopping power transition Pt Au protons alpha particles a wide range, using dielectric formalism, which realistically accounts excitation spectrum each through Mermin Energy Loss Function - Generalised Oscillator Strength methodology. For combination projectile, target, we considered: (i) equilibrium charge state projectile (ii) energy-loss due to electron capture processes, (iii) resulting from polarisation projectile's electronic cloud self-induced electric field. Our powers show fairly good agreement with available experimental data platinum gold, particularly most recent ones around maximum, validates methodology used be further extended other metals. materials studied (platinum gold), two commonly different sources yield comparable mean energies, latter being closer provided ICRU Report than previous compilations. Despite small differences spectra these metals, they lead practically same results far reproduce main features material fulfil physically motivated sum rules.