Energy levels of the singly ionized titanium: Ti II ion

International audienceIn this work, energy levels, oscillator strengths, and transition probabilities for the Ti II ion are calculated by the Hartree-Fock pseudo-Relativistic method using the Cowan (CW) atomic structure code and by the Thomas-Fermi-Dirac-Amaldi method using the AUTOSTRUCTURE (AS) atomic structure code. We used the terms and levels generated by the 12 configurations: 3d2 ns (n = 4-6), 3d2 np (n = 4,5), 3d2 nd (n = 4,5), 3d2 4f, 3d 4s np (n = 4,5), 3d 4s2, 3d3. We improved our ab initio calculated data by using the semi-empirical methods in the CW and AS atomic structure codes. We also compared them with other theoretical and experimental results and obtained new data for this ion