Spectral characteristics of tin and xenon near 13.5 nm

By using the multiconfiguration Dirac-Fock method, the radiative transition energies and transition probabilities of tin and xenon atoms in the ionization degree range from 7 to 13 are systematically calculated, and their convoluted spectra at wavelength near 13.5 nm are provided. The relativistic effect is found to increase the spectral energy by 2%, while the electronic correlation effect reduces the spectral energy by 5% in general. By comparing the emitted spectra from tin and xenon, the authors find that tin is a more efficient candidate element as the extreme ultraviolet(EUV) sources than xenon in view of the spectra.