Extensive and accurate energy levels and transition rates for Al-like Zn XVIII

- Extensive and accurate energy levels and transition rates for Al-like Zn XVIII.
- The MCDHF and MBPT methods are employed.
- The MCDHF and MBPT level energies are in excellent agreement of better than 0.1%, and the
- MCDHF and MBPT level lifetimes mostly agree to within 2%.

Energy levels and transition rates for electric-dipole (E1), electric-quadrupole (E2), magnetic-dipole (M1), and magnetic-quadrupole (M2) transitions of the lowest 393 levels arising from the 3l3 (0≤l⩽2), 3s24l (0≤l⩽3), 3s3p4l (0≤l⩽3), 3p24l (0≤l⩽2), 3s3d4l (0≤l⩽1), and 3s25l (0≤l⩽4) configurations in Al-like Zn are calculated through the multi-configuration Dirac-Hartree-Fock (MCDHF) method and second-order many-body perturbation theory (MBPT). In the MCDHF calculation, valence-valence and core-valence correlations with the 2p and 2s electrons are taken into account. The effect of Breit interaction and quantum electrodynamics corrections on excitation level energies and level lifetimes are assessed though the MCDHF and MBPT calculations. The two sets of level energies are in excellent agreement of better than 0.1%, while the level lifetimes mostly agree to within 2%. Comparisons are also made with experimental measurements and other theoretical results to assess the accuracy of our calculations.