S XI - VERSION 10.0.2


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

  1. s_11.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., 2020, A&A, 634, A7
    DOI:  10.1051/0004-6361/201936931 
    
    Observed energies:
    
    levels 5,6 from SUMER measurements of Feldman and Doschek (2007)
    levels (38,39): Bromage, G.E., Fawcett, B.C., 1977, MNRAS, 178, 605
    levels (28,31,32,221, 217): Lepson et al, 2005, ApJ, 625, 1045
    
    Other levels:
    NIST Atomic Spectra Database, (ver. 5.7.1), [Online].
    https://physics.nist.gov/PhysRefData/ASD/levels_form.html
    
    Note: several NIST energies are uncertain and were not included.
    
    Produced as part of the 'CHIANTI' atomic data base collaboration by
    Giulio Del Zanna, July  2020
    
     -1
     
    

  3. s_11.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.

     
    
    gf-values, A-values and theoretical energies:
    
    Mao, J. , Badnell, N. R., Del Zanna, G., 2020, A&A, 634, A7
    DOI:  10.1051/0004-6361/201936931 
    
    Only transition probabilities with a branching ratio
    greater than 10^(-5) have been retained.
    
    gf-values, A-values for the ground configuration 2s2 2p2 and  the 2s 2p3 are from the ab-initio 
    MCHF calculation by  G. Tachiev (2004), following 
    G. Tachiev and C. Froese Fischer,  (energy adjusted), 2001, Can. J. Phys. 79,955
    http://adsabs.harvard.edu/abs/2001CaJPh..79..955T
    
    Observed energies:
    
    levels 5,6 from SUMER measurements of Feldman and Doschek (2007)
    levels (38,39): Bromage, G.E., Fawcett, B.C., 1977, MNRAS, 178, 605
    levels (28,31,32,221, 217): Lepson et al, 2005, ApJ, 625, 1045
    
    Others:
    NIST Atomic Spectra Database, (ver. 5.7.1), [Online].
    https://physics.nist.gov/PhysRefData/ASD/levels_form.html
    
    Produced as part of the 'CHIANTI' atomic data base collaboration by
    Giulio Del Zanna, July 2020
    
    

  5. s_11.scups (electron collision data)
  6. contains the effective electron collision strengths scaled according to the rules formulated by Burgess and Tully (1992).

     
    
    Giulio Del Zanna, July 2020
    Produced as part of the 'CHIANTI' atomic data base collaboration by
    
    Note: only the 177 bound levels have been retained.
    
    DOI:  10.1051/0004-6361/201936931 
    Mao, J. , Badnell, N. R., Del Zanna, G., 2020, A&A, 634, A7
    
    oscillator strengths and effective collision strengths:
    
    

  7. s_11.psplups (proton collision data)
  8. contains the spline fits to the scaled proton collision strengths.

     
    
    %filename: s_11.psplups
    %rates: Ryans R.S.I., Foster-Woods V.J, Keenan F.P., Reid R.H.G., 1999, ADNDT 73, 1-42
    %energies: CHIANTI database, ver.1, Dere et al., A&AS 125, 149, 1997
    %comment: Fits valid for temperatures 4e5 to 3e7 K.
    %produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
    %
    % Peter Young   10-Sep-2002
    


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

    Page created by Giulio Del Zanna on Wed Jun 8 16:13:35 2022