Atomic structure, radiative lifetime and oscillator strength calculations in doubly ionized molybdenum (Mo iii)

Abstract

Radiative lifetimes, transition probabilities and oscillator strengths in doubly ionized molybdenum (Mo III) are reported for the first time in the present paper. This new set of atomic data has been obtained by using a semi-empirical computational technique based on the pseudorelativistic Hartree-Fock approach in which a large amount of intravalence and core-valence electron correlations were included. In view of the lack of theoretical and experimental data available in the literature for this ion, the reliability of the results obtained in our work is discussed on the basis of comparisons with the isoelectronic ion Nb II for which an investigation was recently performed using a similar method (Nilsson et al 2010 Astron. Astrophys. 511 A16).S Online supplementary data available from stacks.iop.org/ps/0/000000/mmedia

Overview of recent advances performed in the study of atomic structures and radiative processes for the lowest ionization stages of heavy elements

“…During the past 5 years, we notably focused our work on the particular cases of Rb III (Z = 37), Mo III (Z = 42), Rh III (Z = 45), Pd III (Z = 46), Ag III (Z = 47), and Te III (Z = 52) for which no (or very few) radiative rates were available in the literature. For all these ions, the HFR + CPOL + CPEN method has been combined to a semi-empirical adjustment of radial parameters minimizing the differences between calculated energy levels and available experimental values to compute transition probabilities and oscillator strengths for a large number of spectral lines [69][70][71][72]. Because of the lack of radiative lifetime measurements, the quality of our calculations could only be estimated from isoelectronic comparisons, in particular from results we had formerly published in Nb II (isoelectronic of Mo III) [73], in Ru II (isoelectronic of Rh III) [74], and in Rh II (isoelectronic of Pd III) [75], for which similar HFR + CPOL + CPEN models revealed a very good agreement (generally within 10%) with accurate radiative lifetimes measured by means of the time-resolved laser-induced fluorescence technique.…”