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

fe_12.elvlc (energy levels)

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

 
%observed energy levels: Del Zanna and Mason, 2005,  A&A, 433, 731
%theoretical energy levels (second column): Storey, Del Zanna, Mason, Zeippen, 2005,  A&A, 433, 717 (scattering calculation)
%theoretical energies (third column): Del Zanna and  Mason, 2005,  A&A, 433, 731 (SUPERSTRUCTURE calculation 
  with term energy correction)
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
%   Giulio Del Zanna - June 7 2005
 

fe_12.wgfa (radiative data)

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: Del Zanna and Mason, 2005,  A&A, 433, 731
%theoretical energies: Del Zanna and Mason, 2005,  A&A, 433, 731 (SUPERSTRUCTURE calculation
  with term energy correction)
%A values and oscillator strengths: Del Zanna and Mason, 2005,  A&A, 433, 731
%comment: The theoretical  wavelengths are obtained from the SUPERSTRUCTURE calculation
  (with term energy corrections)
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
%   Giulio Del Zanna - June 7 2005

fe_12.splups (electron collision data)

contains the spline fits to the electron collision strengths scaled according the rules formulated by Burgess and Tully (1992). Accurate replication of the temperature averaged collision strength over a wide range of temperatures can be accomplished with the data in this file.

 

%filename: fe_12.splups
%oscillator strengths: Storey, Del Zanna, Mason, Zeippen, 2005,  A&A, 433, 717 (scattering calculation)
%effective collision strengths: Storey, Del Zanna, Mason, Zeippen, 2005,  A&A, 433, 717
%comment: only data for collisions from the ground 3s2.3p3 levels and from/to selected 
  metastable 3s2.3p2.3d levels are retained
%comment: effective collision strengths have been calculated in the temperature range 10^5 - 10^8 K
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
%   Giulio Del Zanna - June 7 2005

fe_12.psplups (proton collision data)

contains the spline fits to the scaled proton collision strengths.

 

%filename: fe_12.psplups
%rates: Landman, D.A., 1978, ApJ 220, 366
%energies: Landman, D.A., 1978, ApJ 220, 366
%comment: Errors (comparing original rates with those derived from the above 
    splines) are at most 2\% for individual points. For transition 3-4, 
    a good fit could not be found, likely implying errors in the original 
    data values. Errors of up to 4.5\% are found for this transition.
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
% Peter Young   7-Jun-2001

---

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

fe_12_table1.html (html table -- 139.7870 -- 202.1570 A)

fe_12_table2.html (html table -- 202.1650 -- 244.1100 A)

fe_12_table3.html (html table -- 244.5230 -- 320.3000 A)

fe_12_table4.html (html table -- 320.5260 -- 3072.0649 A)


Last revised by G. Del Zanna on 4-Sep-2009