Energy Levels, Lifetimes, and Transition Rates for Plike Ions from Cr X to Zn XVI from Largescale Relativistic Multiconfiguration Calculations
Abstract
The fully relativistic multiconfiguration DiracHartreeFock method is used to compute excitation energies and lifetimes for the 143 lowest states of the 3{s}^{2}3{p}^{3}, 3s3p ^{4}, 3{s}^{2}3{p}^{2}3d, 3s3p ^{3}3d, 3p ^{5}, 3{s}^{2}3p3{d}^{2} configurations in Plike ions from Cr X to Zn XVI. Multipole (E1, M1, E2, M2) transition rates, line strengths, oscillator strengths, and branching fractions among these states are also given. Valencevalence and corevalence electron correlation effects are systematically accounted for using large basis function expansions. Computed excitation energies are compared with the NIST ASD and CHIANTI compiled values and previous calculations. The mean average absolute difference, removing obvious outliers, between computed and observed energies for the 41 lowest identified levels in Fe XII, is only 0.057%, implying that the computed energies are accurate enough to aid identification of new emission lines from the Sun and other astrophysical sources. The amount of energy and transition data of high accuracy are significantly increased for several Plike ions of astrophysics interest, where experimental data are still very scarce.
 Publication:

The Astrophysical Journal Supplement Series
 Pub Date:
 April 2018
 DOI:
 10.3847/15384365/aab35e
 arXiv:
 arXiv:1802.09671
 Bibcode:
 2018ApJS..235...27W
 Keywords:

 atomic data;
 atomic processes;
 Physics  Atomic Physics
 EPrint:
 doi:10.3847/15384365/aab35e