Dataset for theoretical transition probabilities, radiative lifetimes and Stark broadening parameters of singly-ionized magnesium
Tables with the data of transition probabilities and theoretical radiative lifetimes for excited nS-, nP-, nD- and nF- states of singled ionized magnesium. All them obtained through ab initio relativistic Hartree–Fock calculations in an intermediate coupling formalism using Cowan´s code. Also, the Griem semiempirical approach was used to obtain the theoretical Stark parameters (width and shift) of spectral lines; these data are displayed for an electron density of 10^17 cm^-3 and temperatures T = 10 – 100 (10^3 K). We have compared results, of lifetimes for 16 levels and Stark parameters for 7 spectral lines, with previously reported the available experiments in literature. Figure. 1 displays a partial Gotrian energy levels scheme of the Mg II showing the adjusted levels and spectral lines, previously mentioned, of greater astrophysical interest. The ratio between the theoretical lifetimes of this study and the previously measured experimental lifetimes can be seen in Figure 2. Figure 3 shows the representation of the lifetime of the levels versus the effective principal quantum number of each level corresponding to different series. In Figure 4, we compared the dependence on the Stark parameters for several spectral lines of Mg II with the electron temperature. In Table 1 are shown the values found for the different parameters involved in the IC calculations, compared with HFR (used as a start in the fitting process). In Tables 2–5, the theoretical transition probabilities and radiative lifetimes of some levels of Mg II are shown. Table 6 shows the effective principal quantum number n* and τ0 and α are two constants, applicable to states with principal quantum number in the range n = 3–10 constant τ0 for different series of states. In Tables S7–S10, the theoretical Stark width and shift parameters for some levels of Mg II are shown.