Journal
JOURNAL OF PHYSICAL AND CHEMICAL REFERENCE DATA
Volume 37, Issue 4, Pages 1659-1763Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2943652
Keywords
ground states; hyperfine structure; ionisation; radiative lifetimes; sodium
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Energy levels, with classifications and uncertainties, have been compiled for the spectra of the neutral atom and all positive ions of sodium (Z=11). Wavelengths with classifications, intensities, and transition probabilities are also tabulated. In addition, ground states and ionization energies are listed. Where available, the hyperfine structure constants and the percentages of the leading components of the energy levels are included. For all ionization stages of sodium, at least some experimental data are available; however, for those for which only a few transitions have been measured, theoretical calculations or values obtained by isoelectronic fitting are reported. Similarly, theoretical or isoelectronically determined ionization energies are given when they are thought to be more accurate than the available experimental data would produce.
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