S IX - VERSION 10.1

The CHIANTI database has the following primary ASCII files for this ion:

  1. s_9.elvlc (energy levels)

    2. 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. 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:

Edlen, B., 1983, Phys. Scr., 28, 51
Jupen, C., Engstrom, L., 1997, Phys.Scr., 56, 592
Lepson et al, 2005, ApJ, 625, 1045

Produced as part of the 'CHIANTI' atomic data base collaboration by
Giulio Del Zanna, Mar 2023



 -1

  2. s_9.wgfa (radiative data)

    3. 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:

Tachiev, G.I. and Froese Fischer, C., A&A, 2002,385,716
MCHF calculations
doi = 10.1051/0004-6361:20011816

 
Observed energies:

Edlen, B., 1983, Phys. Scr., 28, 51
Jupen, C., Engstrom, L., 1997, Phys.Scr., 56, 592
Lepson et al, 2005, ApJ, 625, 1045

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

  3. s_9.scups (electron collision data)

    4. 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:

  4. s_9.psplups (proton collision data)

    5. contains the spline fits to the scaled proton collision strengths. 

     

%file: s_9.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 3e5 to 1e7 K.
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
% Peter Young   15-May-2001

    The html tables below contain the radiative data of the brightest lines sorted in wavelength

    Page created by Giulio Del Zanna on Mon Jun 26 11:19:12 2023