Energy levels of the singly ionized titanium: Ti II ion

Fatemah H. Alkallas , Lamia Abu El Maati , Nabil Ben Nessib , Milan S. Dimitrijević (1)

1 LERMA - Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique

In 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.

Keywords: atomic structure; energy levels; oscillator strengths; transition probabilities

Domains: Sciences of the Universe [physics]

Fatemah H. Alkallas, Lamia Abu El Maati, Nabil Ben Nessib, Milan S. Dimitrijević. Energy levels of the singly ionized titanium: Ti II ion. Astronomical Notes / Astronomische Nachrichten, 2022, 343, ⟨10.1002/asna.20210059⟩. ⟨insu-03717141⟩