S II - VERSION 10.1


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

  1. s_2.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/asd [2013, May 3]. National Institute of Standards and Technology, Gaithersburg, MD. 
    
    Theoretical energies from Tayal and  Zatsarinny, 2010, ApJSS, 188,32
    
    Produced for the CHIANTI database v.8 by Giulio Del Zanna, Apr 2013
    
    
    
     -1
     
    

  3. s_2.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: s_2.wgfa
    
    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/asd [2013, May 3]. National Institute of Standards and Technology, Gaithersburg, MD.
    
    Theoretical energies from Tayal and  Zatsarinny, 2010, ApJSS, 188,32
    Data for the E2 and M1 transitions are courtesy of O. Zatsarinny, March 2012.
    
    Produced for the CHIANTI database v.8 by Giulio Del Zanna, Apr 2013
    
    Removed Removed a few transitions (44-42,44-43,49-48,16-15,46-45)  that were unphysical
    (observed energy of the upper level lower than the energy of the lower level)
    G. Del Zanna 5 May 2016
    
     K Dere  -  minimum branching ratio =   1.00e-05
         2017 December 06
    %File processed with wgfa_tidy by pryoung on  6-Mar-2019
    %File processed with wgfa_tidy by pryoung on 31-May-2023
    

  5. s_2.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 Giulio Del Zanna, Apr 2013
    
    Data from Tayal and  Zatsarinny, 2010, ApJSS, 188,32
    
    
    

  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_2_table.html (html table)

    Page created by Giulio Del Zanna on Mon Jun 26 11:19:21 2023