Systematic study of the stopping power in Lanthanides

MENDEZ, A.M.P.; J. P. PERALTA; D. M. MITNIK; C. C. MONTANARI

Congreso; 22 th INTERNATIONAL CONFERENCE ON ION BEAM MODIFICATION OF MATERIALS; 2022

The knowledge of electronic stopping is important in many fields, from basic physics to technologyand medicine [1]. We focused on lanthanides due to its electronic complexity (open 4f-subshell, needof relativistic description [2]); the importance of rare-earth oxides [3], and discrepancies amongexperimental data. In this work we perform a systematic study of the stopping cross sections from Ce(Z=58) to Lu (Z=71). Fully relativistic atomic structure calculations were developed for the atomicwave functions and binding energies. These values are the only inputs of our full theoreticalcalculations for bound electrons using the shellwise local plasma approximation [4]. Our results coveran extended energy region by considering separately the free electron gas (FEG) and the boundelectrons as in [4]. For Gd the present results describe nicely the latest experimental data around thestopping maximum [5]. For others such as La, Dy, Lu, Tb we note disagreements with old data [6]. Wewill show that the systematic study