The CHIANTI database has the following primary ASCII files for this ion:
contains the energy levels (in cm-1). It includes both experimental and theoretical values of the levels energies.
Theoretical energies: Mao, J., Badnell, N. R., Del Zanna, G.,2021, A&A, 653, A81 "R-matrix electron-impact excitation data for the O-like iso-electronic sequence" DOI: 10.1051/0004-6361/202141464 Note: only bound levels have been retained. Observed energies: level 2 from Edlen, 1983, Ph. Scr., 28, 51 levels 4,5 from the wavelength measured by Feldman, Curdt, Landi, Wilhelm, 2000, ApJ, 544, 508 level (11): from the spectrum of Acton et al 1985, ApJ, 291, 865 Dubious id in CHIANTI from Doschek et al 1973, J.Opt.Soc.Am, 63, 1463 for the 3s levels 25,26 Other levels: NIST Atomic Spectra Database,[Online]. https://physics.nist.gov/PhysRefData/ASD/levels_form.html Produced as part of the 'CHIANTI' atomic data base collaboration by Giulio Del Zanna, Mar 2023 -1
contains wavelengths, gf and A values of the transitions. The wavelengths are based on the experimental energy levels and should be the best available. Wavelengths calculated from the theoretical energies are of an indeterminate accuracy and their values are presented as negative values of the calculated wavelength.
gf-values, A-values and theoretical energies: Mao, J., Badnell, N. R., Del Zanna, G., 2021, A&A, 653, A81 "R-matrix electron-impact excitation data for the O-like iso-electronic sequence" DOI: 10.1051/0004-6361/202141464 Note: only bound levels have been retained. Only transition probabilities with a branching ratio greater than 10^(-5) have been retained. gf-values, A-values for the lowest 10 levels: Song, C. X.; Zhang, C. Y. ; Wang, K.; Si, R.; Godefroid, M.; Jonsson, P. ; Dang, W. ; Zhao, X. H. ; Yan, J. ; Chen, C. Y., 2021, Atomic Data and Nuclear Data Tables, 138, 101377 "Extended calculations with spectroscopic accuracy: Energy levels and radiative rates for O-like ions between Ar XI and Cr XVII" DOI: 10.1016/j.adt.2020.101377 Observed energies: level 2 from Edlen, 1983, Ph. Scr., 28, 51 levels 4,5 from the wavelength measured by Feldman, Curdt, Landi, Wilhelm, 2000, ApJ, 544, 508 level (11): from the spectrum of Acton et al 1985, ApJ, 291, 865 Dubious id in CHIANTI from Doschek et al 1973, J.Opt.Soc.Am, 63, 1463 for the 3s levels 25,26 Other levels: NIST Atomic Spectra Database,[Online]. https://physics.nist.gov/PhysRefData/ASD/levels_form.html Produced as part of the 'CHIANTI' atomic data base collaboration by Giulio Del Zanna, Mar 2023 %File processed with wgfa_tidy by pryoung on 31-May-2023
contains the effective electron collision strengths scaled according to the rules formulated by Burgess and Tully (1992).
Giulio Del Zanna, Mar 2023 Produced as part of the 'CHIANTI' atomic data base collaboration by Note: only bound levels have been retained. DOI: 10.1051/0004-6361/202141464 "R-matrix electron-impact excitation data for the O-like iso-electronic sequence" Mao, J., Badnell, N. R., Del Zanna, G., 2021, A&A, 653, A81 oscillator strengths and effective collision strengths:
contains the spline fits to the scaled proton collision strengths.
%filename: ca_13.psplups %rates: Ryans R.S.I., Keenan F.P., Reid R.H.G., unpublished. %energies: Observed values, from .elvlc file %comment: Fits valid for temperatures 7e5 to 1.2e7 K. %produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration % % Peter Young 15-May-2001
Page created by Giulio Del Zanna on Mon Jun 26 11:14:56 2023