Uncertainties of Electron Capture Cross Sections In Be⁴⁺ + H(1s) Collisions

We have considered one-electron systems where the theoretical methods are well established. The use of different computational alternatives enables the accurate evaluation of nl-partial cross sections in a wide range of collision energies. In the presentation we have analyzed the uncertainties of n-partial charge exchange (CX) cross sections in Be⁴⁺ + H(1s) collisions, which are relevant in tokamak plasmas and experimental data are not available.