Abstract
An approach based on linear transport theory is described here to model the transport of incident ions and recoil particles in complex target materials. Using the time and energy dependent Boltzmann Fokker-Planck (BFP) equation, we have numerically computed particle densities for two incident ion (oxygen and barium) species as well as for all recoil particle species, self-consistently, in the superconducting material YBa 2Cu 3O 7. An advantage of our approach is that the scattering, recoil and energy deposition cross sections are computed once for each combination of incident ion and target material and a given (e.g., Universal) potential. These interaction cross sections are then used in the BFP code to study both time dependent (pulsed ion beam) and equilibrium (steady-state ion beam) scenarios. Pulsed mode results provide insight into the decay behavior of each recoil species and equilibrium spectra are obtained in steady state mode. Our numerical model also describes the partitioning of energy deposition amongst the atomic species as well as the fate of the incident ion and recoils in interstitial, substitution or replacement sites.
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