N=3–3 transitions of Ne-like ions in the iron group, especially Ca10+ and Ti12+

Abstract

The Ti XIII 2s22p53l–3l′ and 2s2p63l–3l′ transitions that have been discussed previously on the basis of beam-foil spectra and laser-produced plasmas in comparison to semi-empirically scaled computations have now been treated by accurate ab initio multireference Mø ller–Plesset calculations. While most 2s22p53l–3l′ line identifications are supported by the new calculations, the 2s2p63l–3l′ transition arrays are revised. Theoretical level positions are given for all elements from Ca through Fe. The quality of the calculation is demonstrated on beam-foil spectra of Ca.