https://hal-utt.archives-ouvertes.fr/hal-02860643Vincent, RémiRémiVincentDonostia International Physics Center - DIPC (SPAIN) - DIPC - Donostia International Physics Center - UPV/EHU - University of the Basque Country/Euskal Herriko UnibertsitateaJuaristi, Joseba IñakiJoseba IñakiJuaristiNagy, IstvánIstvánNagyDonostia International Physics Center - DIPC (SPAIN) - DIPC - Donostia International Physics Center - UPV/EHU - University of the Basque Country/Euskal Herriko UnibertsitateaTechnical University of Budapest - Un iversity of BudapestTransport cross sections based on a screened interaction potential: Comparison of classical and quantum-mechanical resultsHAL CCSD2005[SPI.OPTI] Engineering Sciences [physics]/Optics / PhotonicVU VAN, Jean-Baptiste2020-06-08 14:43:332022-11-09 09:58:052020-06-08 14:43:33enJournal articles10.1103/PhysRevA.71.0629021Standard classical and quantum-mechanical methods are used to characterize the momentum-transfer cross section needed in energy-loss calculations and simulations for heavy, swift charges moving in an electron gas. By applying a well-known, finite-range screened Coulombic potential energy to model the two-body collision, the quantitative applicability range of the classical cross section is investigated as a function of charge (Z), screening length (R), and scattering relative velocity (v). The a posteriori condition (Z/R)/v2<1, as an upper bound for heavy charges, is deduced for this applicability range from the comparative study performed.