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

fe_20.elvlc (energy levels)

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

 
%Observed energy levels (2-5): Kucera et al., 2000, ApJ, 538, 424
%Observed energy levels (6-15): Edlen, B., 1984,P ysicaS cripta, 30, 135
%Observed energy levels (n=3): identifications from the X-ray line list by Landi &P hillips 2005, ApJS, 160, 286 
%Observed energy levels (n=4,5):S hirai,T., Sugar,J., Musgrove,A., Wiese,W.L., 2000, J.Phys.Chem.Ref.Data, Monograph 8
%Theoretical energy levels (levels up to n=4): Witthoeft, M.C.,D el Zanna,G ., & Badnell, N.R. 2007, A&A, 466, 763
%Theoretical energy levels (n=5 levels): Landi &G u, 2006, ApJ, 640, 1171
%Theoretical energy levels (above ionization): Bautista, M.A., Mendoza, C., Kallman, T.R.,P almeri, P., 2004, A&A, 418, 1171
%comment: theoretical energy levels fromP almeri 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
%
%  Giulio Del Zanna and Enrico Landi - Oct 2008
 

fe_20.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.

 
%filename: fe_20.wgfa
%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, ApJS, 160, 286
%Observed energy levels (n=4,5): Shirai,T., Sugar,J., Musgrove,A., Wiese,W.L., 2000, J.Phys.Chem.Ref.Data, Monograph 8
%Theoretical energy levels (levels up to n=4): Witthoeft, M.C., Del Zanna, G., & Badnell, N.R. 2007, A&A, 466, 763
%Theoretical energy levels (n=5 levels): Landi & Gu, 2006, ApJ, 640, 1171
%Theoretical energy levels (above ionization): Bautista, M.A., Mendoza, C., Kallman, T.R., Palmeri, P., 2004, A&A, 418, 1171
%A and gf values (levels up to n=4): Witthoeft, M.C., Del Zanna, G., & Badnell, N.R. 2007, A&A, 466, 763
%A and gf values (n=5 levels): Landi & Gu, 2006, ApJ, 640, 1171
%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 360 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
%
%     Giulio Del Zanna and Enrico Landi - Oct 2008

fe_20.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_20.splups
%oscillator strengths (up to n=4 levels): Witthoeft, M.C., Del Zanna, G., & Badnell, N.R. 2007, A&A, 466, 763
%oscillator strengths (n=5 levels): Landi & Gu, 2006, ApJ, 640, 1171
%oscillator strengths (above ionization): Bautista, M.A., Mendoza, C., Kallman, T.R., Palmeri, P., 2004, A&A, 418, 1171
%effective collision strengths (up to n=4 levels): Witthoeft, M.C., Del Zanna, G., & Badnell, N.R. 2007, A&A, 466, 763
%effective collision strengths (n=5 levels): Landi & Gu, 2006, ApJ, 640, 1171
%effective collision strengths (above ionization): Bautista, M.A., Mendoza, C., Kallman, T.R., Palmeri, P., 2004, A&A, 418, 1171
%comment: all excitations from the ground configuration have been retained form the original calculation. 
%comment: effective collision strengths from FAC were provided in the temperature range 1.16e6 < T < 5.8e7
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
%   Giulio Del Zanna - Oct 2008

fe_20.psplups (proton collision data)

contains the spline fits to the scaled proton collision strengths.

 

%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

fe_20.reclvl (total recombination population rates)

 
%filename: fe_20.reclvl
%Total recombination population rate: Gu, M.F., 2003, ApJ, 582, 1241
%comment: level indexing modified on 7-Dec-2007
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
% Enrico Landi and Giulio Del Zanna  -  7-Dec-2007

fe_20.cilvl (collisional ionization population rates)

 
%filename: fe_20.cilvl
%Collisional ionization population rate: Gu, M.F., 2003, ApJ, 582, 1241
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
% Enrico Landi - Feb 2004

---

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

fe_20_table1.html (html table -- 9.7334 -- 721.5593 A)

fe_20_table2.html (html table -- 11.9487 -- 12.9129 A)

fe_20_table3.html (html table -- 12.9156 -- 13.6867 A)

fe_20_table4.html (html table -- 13.7025 -- 721.5593 A)

fe_20_table5.html (html table -- 34.3173 -- 2666.0317 A)


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