[en] The ab initio quasirelativistic approach developed specifically for the calculation of spectral parameters of highly charged ions was used to derive transition data for the Ru-like tungsten ion W${}^{30+}$. The configuration interaction method was applied to include electron correlation effects. The relativistic effects were taken into account in the Breit–Pauli approximation. The level energies, radiative lifetimes $\tau$, Landé $g$-factors were determined for the ground configuration 4p⁶4d⁸ and two excited configurations 4p⁵4d⁹ and 4p⁶4d⁷4f. The radiative transition wavelengths $\lambda$ and emission transition probabilities $A$ for the electric dipole, electric quadrupole, electric octupole, magnetic dipole, and magnetic quadrupole transitions among the levels of these configurations were generated.

[en] The ab initio quasirelativistic approach developed specifically for the calculation of spectral parameters of highly charged ions was used to derive transition data for the Nb-like tungsten ion W³³⁺. The configuration interaction method was applied to include electron correlation effects. The relativistic effects were taken into account in the Breit–Pauli approximation. The level energies, radiative lifetimes $\tau$, Landé $g$-factors were determined for the ground configuration 4p⁶4d⁵ and two excited configurations 4p⁵4d⁶ and 4p⁶4d⁴4f. The radiative transition wavelengths $\lambda$ and emission transition probabilities $A$ for the electric dipole, electric quadrupole, electric octupole, magnetic dipole, and magnetic quadrupole transitions among the levels of these configurations were produced. The uncertainties of computed spectroscopic parameters were evaluated.

[en] The ab initio quasirelativistic approach was used to derive transition data for Pd-like tungsten W${}^{28+}$ ion. This approach was developed specifically for the calculation of spectral parameters for highly charged ions. The relativistic effects were taken into account in the Breit–Pauli approximation. The configuration interaction method was applied to include electron correlation effects. The ground configuration ${4\mathrm{p}}^6{4\mathrm{d}}^{10}$ and the lowest excited ${4\mathrm{p}}^6{4\mathrm{d}}^{9}4\mathrm{f}$ were considered. The calculations for W${}^{28+}$ were performed with different sets of interacting configurations in order to evaluate reliability and accuracy of produced results. Level energies, radiative lifetimes $\tau$, Landé $g$-factors were determined for the excited configuration ${4\mathrm{p}}^6{4\mathrm{d}}^{9}4\mathrm{f}$ of W${}^{28+}$ levels. The radiative transition wavelengths $\lambda$ and emission transition probabilities $A$ for the electric and magnetic transitions of various multipole order (up to E5 and M4) among the levels of these two configurations were produced. The uncertainties of computed spectroscopic parameters were evaluated.

[en] Energy levels, radiative transition probabilities, Landé $g$-factors, and radiative lifetimes are reported for 144 levels of the 3p${}^6$3d${}^6$ and 3p${}^5$3d${}^7$ configurations of the Cr-like ions Kr XIII, Tc XX and Xe XXXI. Since to our knowledge no prior data for energy levels or $A$-values, experimental or theoretical, are available in the literature for these ions, calculations have been performed with three independent atomic structure codes, namely GRASP, FAC and a code implementing the QR approach, with increasing configuration interaction (CI) basis with each code. This is to establish the accuracy of the calculated results so that data can be confidently applied in the modeling of plasmas. Our recommended data are determined within the QR approach, because not only has the largest CI basis been included in this calculation, the reliability has already been established in our earlier work for other Cr-like ions, for which some experimental and theoretical data were available for comparison. Results for radiative rates ($A$-values) and transition wavelengths ($\lambda$) are listed for all strong E1, E2 and M1 transitions among the 144 levels of each ion.

[en] We report calculations of energy levels and radiative rates ($A$-values) for transitions in Cr-like Co IV and Ni V. The quasi-relativistic Hartree–Fock (QRHF) code is adopted for calculating the data although grasp (general-purpose relativistic atomic structure package) and flexible atomic code (fac) have also been employed for comparison purposes. No radiative rates are available in the literature to compare with our results, but our calculated energies are in close agreement with those compiled by NIST for a majority of the levels. However, there are discrepancies for a few levels of up to 3%. The $A$-values are listed for all significantly contributing E1, E2 and M1 transitions, and the corresponding lifetimes reported, although unfortunately no previous theoretical or experimental results exist to compare with our data.