Fe IX - VERSION 10.1


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

  1. fe_9.elvlc (energy levels)
  2. contains the energy levels (in cm-1). It includes both experimental and theoretical values of the levels energies.

     
    
    Observed and theoretical energies: 
    
    Del Zanna, G., Storey, P. J., Badnell, N. R., Mason, H. E., 2014, A&A, 565, A77
    DOI: 10.1051/0004-6361/201323297
    
    Ryabtsev, A.N., Kononov, E.Y., Young, P.R., 2022, ApJ, 936, 60
    DOI: 10.3847/1538-4357/ac7d51
    
    Note: the the theoretical energies are the 'best energies', i.e. 
    are the empirically-adjusted theoretical energies.
    
    
    Theoretical energy levels (n=6 levels above level no.865):
    O'Dwyer, B., Del Zanna, G., Badnell, N.R., Mason, H. E.,Storey, P.J.,
    2012, A&A, 537, A22
    
    Produced for the CHIANTI database v.8 by G. Del Zanna 26 June 2014
    
    %comments
      Energies for the 4f levels are from Ryabtsev et al. (2022), but the energies
      assigned to the 3F4 and 1G4 levels have been swapped. The energies for the
      1F3 and 3F3 levels have also been swapped. The CHIANTI 10.1 paper has more
      details.
      
      Of the 45 3d^2 level energies listed by Ryabtsev et al. (2022), 16 were added
      to the CHIANTI model. A separate document explains how the decisions were made
      - see the CHIANTI 10.1 paper for more details.
    -1
     
    

  3. fe_9.wgfa (radiative data)
  4. 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.

     
    %filename:  fe_9.wgfa
    
    Theoretical energies, gf and A-values:
    
    Del Zanna, G., Storey, P. J., Badnell, N. R., Mason, H. E., 2014, A&A, 565, A77
    DOI: 10.1051/0004-6361/201323297
    
    Note: the the theoretical energies are the 'best energies', i.e.
    are the empirically-adjusted theoretical energies.
    
    n=6 levels (above level no.865):
    O'Dwyer, B., Del Zanna, G., Badnell, N.R., Mason, H. E.,Storey, P.J.,
    2012, A&A, 537, A22
    
    
    Produced for the CHIANTI database v.8 by G. Del Zanna 26 June 2014
    
     K. Dere  -  minimum branching ratio =   1.00e-05
        2017 December 06
    
    %comment:
      5-Apr-2023, wavelengths updated with the new elvlc file energies.
    
    %File processed with wgfa_tidy by pryoung on  5-Apr-2023
    %File processed with wgfa_tidy by pryoung on 31-May-2023
    %File processed with wgfa_tidy by pryoung on 31-May-2023
    

  5. fe_9.scups (electron collision data)
  6. contains the effective electron collision strengths scaled according to the rules formulated by Burgess and Tully (1992).

     
    
    
    Produced for the CHIANTI database v.8 by G. Del Zanna 26 June 2014
    
    2012, A&A, 537, A22
    O'Dwyer, B., Del Zanna, G., Badnell, N.R., Mason, H. E.,Storey, P.J.,
    for the n=6 levels (above level no.865):
    
    DOI: 10.1051/0004-6361/201323297
    Del Zanna, G., Storey, P. J., Badnell, N. R., Mason, H. E., 2014, A&A, 565, A77
    
     Effective collision strenghts are from:
    
    
    

  7. (proton collisional data) Not available in this VERSION.

  8. 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 11:17:00 2023