Wavelengths, Transition Probabilities, and Energy Levels for the Spectra of Sodium (NaI–NaXI)

Abstract

Energy levels, with classifications and uncertainties, have been compiled for the spectra of the neutral atom and all positive ions of sodium ͑Z =11͒. 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. © 2008 by the U.S. Secretary of Commerce on behalf of the United States. All rights reserved.

Non-LTE calculations for neutral Na in late-type stars using improved atomic data

“…The energy levels are coupled by radiative transitions and by collisional transitions with electrons and neutral hydrogen. Experimentally measured energies were taken from the compilation by Sansonetti (2008) (for highly excited states isoelectronic fitting was used). Because we are not concerned with modelling the detailed structure of highly excited levels, we collapsed all sublevels for n = 7−12 into super-levels.…”

MCDHF Calculations and Beam-Foil EUV Spectra of Boron-Like Sodium Ions (Na VII)

“…In Table 1, we compare the energies from the final RCI calculation with observed energies from the compilation by Sansonetti [12] and with calculated energies by Koc [38]. The calculations by Koc are based on a multireference RCI method with an orbital set based on analytical Gaussian functions.…”

“…The Söderqvist data form the bulk of the compilations on Na VII by Kelly and Palumbo [9,10] and by Martin and Zalubas [11] (who changed some level designations to improve the regularity of the level sequences). The spectroscopic world knowledge on the various spectra of Na has been compiled by J. Sansonetti as recently as 2008 [12]. In this compilation, in the interval 62 Å to 790 Å, all Na VII wavelengths, but one, refer to Söderqvist's paper of 1944.…”

SYSTEMATIC CALCULATIONS OF ENERGY LEVELS AND TRANSITION RATES OF BE-LIKE IONS WITH Z = 10–30 USING A COMBINED CONFIGURATION INTERACTION AND MANY-BODY PERTURBATION THEORY APPROACH

“…This paper presents our work for Be-like ions with a nuclear charge number Z = 10-30. Many lines of these ions have been observed in both astrophysical and laboratory plasmas (Kelly 1987;Kaufman & Martin 1991;Brown et al 1998Brown et al , 2002Brown et al , 2008Shirai et al 2000;Landi et al 2002;Lepson et al 2003Lepson et al , 2005Curdt et al 2004;Werner et al 2004;Landi & Phillips 2005;Kramida & Buchet-Poulizac 2006;Brosius et al 2008;Del Zanna 2008;Sansonetti 2008;Chen et al 2007;Gu et al 2007Gu et al , 2011Del Zanna & Woods 2013).…”