Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Extended Calculations of Spectroscopic Data: Energy Levels, Lifetimes
  and Transition rates for O-like ions from Cr XVII to Zn XXIII   Employing two state-of-the-art methods, multiconfiguration
Dirac--Hartree--Fock and second-order many-body perturbation theory, the
excitation energies and lifetimes for the lowest 200 states of the $2s^2 2p^4$,
$2s 2p^5$, $2p^6$, $2s^2 2p^3 3s$, $2s^2 2p^3 3p$, $2s^2 2p^3 3d$, $2s 2p^4
3s$, $2s 2p^4 3p$, and $2s 2p^4 3d$ configurations, and multipole (electric
dipole (E1), magnetic dipole (M1), and electric quadrupole (E2)) transition
rates, line strengths, and oscillator strengths among these states are
calculated for each O-like ion from Cr XVII to Zn XXIII. Our two data sets are
compared with the NIST and CHIANTI compiled values, and previous calculations.
The data are accurate enough for identification and deblending of new emission
lines from the sun and other astrophysical sources. The amount of data of high
accuracy is significantly increased for the $n = 3$ states of several O-like
ions of astrophysics interest, where experimental data are very scarce.

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The categories of this paper are: eess
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The categories of this paper are: math-ph
12
The categories of this paper are: nucl-th
9
The categories of this paper are: nlin
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The categories of this paper are: stat
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The categories of this paper are: alg-geom
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The categories of this paper are: ao-sci
6
The categories of this paper are: astro-ph
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The categories of this paper are: econ
13
The categories of this paper are: quant-ph
1
The categories of this paper are: cs
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The categories of this paper are: patt-sol
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The categories of this paper are: hep-lat
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The categories of this paper are: cmp-lg
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The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio