Fe XX - VERSION 5.1

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

• fe_20.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 (2-5): Kucera et al., 2000, ApJ, 538, 424
  %Observed energy levels (6-15): Edlen, B., 1984, Pysica Scripta, 30, 135
  %Observed energy levels (n=3): identifications from the X-ray line list by Landi & Phillips 2005, ApJ, in press
  %Observed energy levels (n=4,5): Shirai,T., Sugar,J., Musgrove,A., Wiese,W.L., 2000, J.Phys.Chem.Ref.Data, Monograph 8
  %Observed energy levels (n=305-307,363,364): identifications from the X-ray line list by Landi & Phillips 2005, ApJ, in press
  %observed energy levels (above ionization): Palmeri P., Mendoza C., Kallman T.R., Bautista M.A., 2003, A&A, 403, 1175
  %Theoretical energy levels (below ionization): Landi & Gu, 2005, ApJ, in press
  %theoretical energy levels (above ionization): Bautista, M.A., Mendoza, C., Kallman, T.R., Palmeri, P., 2004, A&A, 418, 1171
  %comment: theoretical energy levels from Palmeri et al are treated as experimental ones when no measured value was available
  %produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
  %
  % Enrico Landi - Jul 2005
  

  
  

• fe_20.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 (2-5): Kucera et al., 2000, ApJ, 538, 424
  %Observed energy levels (6-15): Edlen, B., 1984, Pysica Scripta, 30, 135
  %Observed energy levels (n=3): identifications from the X-ray line list by Landi & Phillips 2005, ApJ, in press
  %Observed energy levels (n=4,5): Shirai,T., Sugar,J., Musgrove,A., Wiese,W.L., 2000, J.Phys.Chem.Ref.Data, Monograph 8
  %Observed energy levels (n=305-307,363,364): identifications from the X-ray line list by Landi & Phillips 2005, ApJ, in press
  %observed energy levels (above ionization): Palmeri P., Mendoza C., Kallman T.R., Bautista M.A., 2003, A&A, 403, 1175
  %Theoretical energy levels: Landi & Gu, 2005, ApJ, in press
  %A and gf values (below ionization): Landi & Gu, 2005, ApJ, in press
  %Radiative data innershell transitions to levels 1 to 15: Palmeri P., Mendoza C., Kallman T.R., Bautista M.A., 2003, A&A, 403, 1175
  %Radiative data transitions to levels 726 and up: Bautista, M.A., Mendoza, C., Kallman, T.R., Palmeri, P., 2004, A&A, 418, 1171
  %Autoionization rates: Palmeri P., Mendoza C., Kallman T.R., Bautista M.A., 2003, A&A, 403, 1175
  %produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
  %
  % Enrico Landi - Jul 2005
  

  
  

• fe_20.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_20.splups
  %gf values: Landi & Gu, 2005, ApJ, in press
  %oscillator strengths (above ionization): Bautista, M.A., Mendoza, C., Kallman, T.R., Palmeri, P., 2004, A&A, 418, 1171
  %effective collision strengths (ground configuration transitions): McLaughlin, B.M., & Kirby, K.P. 2001, J.Phys.B, 34, 2255
  %effective collision strengths (level 1-208,210,212,213,215-217,219): Landi & Gu, 2005, ApJ, in press
  %effective collision strengths (levels 14,15): Butler and Zeippen, 2001, A&A, 372, 1078
  %Collision strengths (all other levels): Landi & Gu, 2005, ApJ, in press
  %collisional data (above ionization): Bautista, M.A., Mendoza, C., Kallman, T.R., Palmeri, P., 2004, A&A, 418, 1171
  %Comment: collision rates for levels 1-208,210,212,213,215-217,219 were obtained by summing DW calculations
    from FAC with the resonance excitation rates published in Gu, M.F., 2003, ApJ, 582, 1241
  %comment: effective collision strengths for the ground configuration were provided in the temperature range 5.0 < Log T < 8.0
  %comment: effective collision strengths for levels 14,15 were provided in the temperature range 5.0 < Log T < 7.6
  %comment: effective collision strengths from the Flexible Atomic Code were provided in the temperature range 1.16e6 < T < 5.8e7
  %produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
  %
  % Enrico Landi - Jul 2005
  

  
  

• fe_20.psplups (electron collision data)

  contains the spline fits to the scaled proton collision strengths.

  References:

  
  %filename: fe_20.psplups
  %rates: Bhatia, A.K., Mason, H.E., 1980, A&A 83, 380
  %energies: Bhatia, A.K., Mason, H.E., 1980, A&A 83, 380
  %comments: The fits are good to < 3%. An acceptable fit could not be found to 
      the 1 - 4 transition and so it was omitted. The rates for this 
      transition are around 1e-12 and so it is not important.
  %produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
  %
  % Peter Young   11-Sep-2002
  

  
  

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

  
  

• fe_20_table1.html (html table -- part 1)

• fe_20_table2.html (html table -- part 2)

• fe_20_table3.html (html table -- part 3)

• fe_20_table4.html (html table -- part 4)

• fe_20_table5.html (html table -- part 5)