L- and M-shell ionization cross sections for heavy atoms

C. MONTANARI; A. M. P. MENDEZ; D. MITNIK; S. SEGUI; J. M. FERNÁNDEZ-VAREA; M. DINGFELDER

Toyama

Conferencia; IBA-PIXE2023: 26th international conference on Ion-Beam Analysis and 18th International conference on Paticle Induced X-ray Emission; 2023

Inner-shell ionization finds many applicationsrelated to materials analysis. However, full theoreticalcalculations in heavy multi-electronic atoms (Z>70) arescarce. Despite the long history of atomic collisionphysics, different tasks remain to be completed,especially in determining ionization cross-sections. Fromthe theoretical point of view, the description of innershells of multi-electronic targets is far from thehypothesis of a hydrogenic target with a single activeelectron in a central potential. Experimentally, themultiple bound shells and the many-decay paths to beconsidered hamper the accurate assessment of theionization cross sections from measured x-ray emissioncross sections [1]. In this contribution, we present recentcalculations of M-shell ionization cross sections of Hf,Ta, W, Re, Os, Pt, Au, Pb, and Bi by proton and electronimpact.