L-shell X-ray production cross sections of Ce, Nd, Sm, Eu, Gd, and Dy by impact of ~(14)N~(2+) ions with energies between 7.0 MeV and 10.5 MeV

摘要

L-shell X-ray production cross sections from the lanthanoid elements Ce, Nd, Sm, Eu, Gd, and Dy, induced by the impact of ~(14)N~(2+) ions with energies in the interval 7.0 MeV to 10.5 MeV (0.50 MeV/μ to 0.75 MeV/μ), were measured and then compared with theoretical calculations obtained with the ECPSSR model with exact limits of integration (eCPSSR) and related corrections. These include the electron capture by the incoming ion and multiple ionizations of higher shells. Data from this work were contrasted with previously published L X-ray production cross sections for ~(14)N~(2+) ion impact. As with other ions, a universal behavior is found when L_α and L_γ X-ray production cross sections are plotted as a function of reduced velocity parameters. The agreement with theoretical predictions was very good when the corrections were applied to the eCPSSR model.