Atomic Structure Calculations of Triply Ionized Lanthanum (La IV)

We have calculated the transition parameters, such as wavelengths, oscillator strengths, and transition probabilities (or rates), for the electric dipole (E1) transitions in triply ionized lanthanum (La IV, Z = 57) by using the relativistic Hartree-Fock (HFR) method. Comparisons are made with experimental and other available theoretical results to assess the reliability and accuracy of the present calculations. Moreover, some new wavelengths, oscillator strengths and transition probabilities of E1 transitions have been obtained using this method. These results are reported for the first time in this work.