Fe XII - VERSION 5.1

The CHIANTI database consists of 4 primary ASCII files for each ion in the database.

• fe_12.elvlc (energy levels)

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

  References:

  %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 for each transition. Wavelengths are based on experimental level energies where available; wavelengths calculated from theoretical energies are less accurate and are given as negative values.

  References:

  %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 to 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.

  References:

  
  %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 (electron collision data)

  contains the spline fits to the scaled proton collision strengths.

  References:

  
  %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 table below contains the radiative data of the brightest lines sorted in wavelength

  
  

• fe_12_table1.html (html table -- part 1)

• fe_12_table2.html (html table -- part 2)

• fe_12_table3.html (html table -- part 3)

• fe_12_table4.html (html table -- part 4)