S III - VERSION 8.0


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

  1. s_3.elvlc (energy levels)
  2. contains the energy levels (in cm-1). It includes both experimental and theoretical values of the levels energies.

     
     
      Observed energies: Kramida, A., Ralchenko, Yu., Reader, J., and NIST ASD Team (2012). 
    NIST Atomic Spectra Database (ver. 5.0), [Online]. Available: http://physics.nist.gov/
    
    
    Theoretical energies:
    Hudson, C. E., Ramsbottom, C. A., & Scott, M. P. 2012, ApJ, 750, 65
    
    Produced for the CHIANTI database v.8 by G. Del Zanna 28 Apr 2014
    
     -1
     
    

  3. s_3.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.

     
    
    %  observed energy levels: Johansson L., Magnusson C.E., Joelsson I., Zetterberg P.O., Physica Scripta 46, 221, 1992
    %  theoretical energy levels: Tayal S.S., Gupta G.P., ApJ 526, 544, 1999
    %  A-values and gf-values (levels 1-41): Froese Fischer, C., Tachiev, G., & Irimia, A. 2006, ADNDT, 92, 607
    %  A-values (transitions involving level 16): P.R. Young, 2000, unpublished Superstructure calculation
    %  A-values and gf-values (transitions involving 4d levels): Tayal S.S., 1997, ADNDT 67, 331
    %  A-values and gf-values (transitions involving 4d 3F and 1F levels: Hudson et al., 2012, ApJ, 750, 65
    % 
    %  comment: Level 16 is metastable, and E2, M1 and M2 transition probabilities were calculated using 
    %            SUPERSTRUCTURE. For the model of the ion, the six configurations of the CHIANTI model were included
    %  comment: The wavelengths are not those given in Table III of Tayal as these are slightly different from 
    %            the observed ones. The gf and A-values were not scaled by the ratio of observed and theoretical wavelengths.
    %  Produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
    %  
    %     P.R. Young, E. Landi & G. Del Zanna -  Nov  2013
    
    
     
    

  5. s_3.scups (electron collision data)
  6. contains the effective electron collision strengths scaled according to the rules formulated by Burgess and Tully (1992).

     
    
    Data from:
    Hudson, C. E., Ramsbottom, C. A., & Scott, M. P. 2012, ApJ, 750, 65
    
    Produced for the CHIANTI database v.8 by G. Del Zanna 28 Apr 2014
    
    
    
    

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

  8. The html table below contains the radiative data of the brightest lines sorted in wavelength

    s_3_table.html (html table)

    Page created by Giulio Del Zanna on Fri Sep 18 13:29:36 2015