S XII - VERSION 11.0

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

  1. s_12.elvlc (energy levels)

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

     
 
Experimental energies:
Kramida, A., Ralchenko, Yu., Reader, J., and NIST ASD Team (2013).
NIST Atomic Spectra Database (ver. 5.1), see http://physics.nist.gov/asd

Note:  Levels 24,25, 48, 59, are from   Lepson et al, 2005, ApJ, 625, 1045

Theoretical energies:
G Y Liang, N R Badnell and G Zhao  A&A 547, A87 (2012)
   DOI: 10.1051/0004-6361/201220277

 Produced for the CHIANTI database v.8 by G. Del Zanna 2 May 2014
 
 -1

  2. s_12.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. 

     

Experimental energies:
Kramida, A., Ralchenko, Yu., Reader, J., and NIST ASD Team (2013).
NIST Atomic Spectra Database (ver. 5.1), see http://physics.nist.gov/asd

Note:  Levels 24,25, 48, 59, are from   Lepson et al, 2005, ApJ, 625, 1045

Theoretical energies, gf and A-values:
G Y Liang, N R Badnell and G Zhao  A&A 547, A87 (2012)
   DOI: 10.1051/0004-6361/201220277

Note: only transitions with a branching ratio above 10^-5 
have been retained.

Transitions within the first 15 levels (2s 2p2, 2p3):
P. Rynkun, P. Jonsson, G. Gaigalas,  C. Froese Fischer
Atomic Data and Nuclear Data Tables 98 (2012) 481, 556

 Produced for the CHIANTI database v.8 by G. Del Zanna 10 Nov 2014
 
%File processed with wgfa_tidy by pryoung on  6-Mar-2019
%File processed with wgfa_tidy by pryoung on 31-May-2023

  3. s_12.scups (electron collision data)

    4. 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 5 May 2014
                                                                
   DOI: 10.1051/0004-6361/201220277                             
G Y Liang, N R Badnell and G Zhao  A&A 547, A87 (2012)          
Data are from

  4. s_12.psplups (proton collision data)

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

     

%filename: s_12.psplups
%rates: Foster VJ, Keenan FP, Reid RHG, ADNDT 67, 99, 1997
%energies: From .elvlc file, experimental energies
%comment: The rate coefficients are in units cm^3/s.
%comment: Fits valid for temperatures 3e5 to 8e6 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 Tue Dec 3 13:24:58 2024