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

fe_8.elvlc (energy levels)

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

 
%Experimental energy levels: Martin, W.C., Sugar, J., Musgrove, A., Dalton, G.R., 1999,
    NIST Database for Atomic Spectroscopy, Version 2.0, NIST Standard Reference Database 61
%Experimental energy levels (3p6.4d levels - 51,52): Ekberg, J.O. & Feldman U., 2003, ApJ, 595, 517
%theoretical energy levels: Griffin, D.C., Pindzola, M.S., Badnell, N.R., 2000, A&ASS, 142, 317
%theoretical energy levels n=5,6,7: Czyzak,S.J., Krueger,T.K., 1966, ApJ, 144, 381
%Comment: Shirai,T., Sugar,J., Musgrove,A., Wiese,W.L., 2000, J.Phys.Chem.Ref.Data, Monograph 8 report
          an inversion of energies between levels 70 and 72 (same J). For consistency with Griffin 
          et al 2000, who adapted their atomic structure calculation to a set of observed energies
          identical to the NIST one, we use the NIST v.2 level ordering.
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
% E.Landi - Nov 2004
 

fe_8.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.

 
%Experimental energy levels: Martin, W.C., Sugar, J., Musgrove, A., Dalton, G.R., 1999,
      NIST Database for Atomic Spectroscopy, Version 2.0, NIST Standard Reference Database 61.
%Experimental energy levels (3p6.4d levels - 51,52): Ekberg, J.O. & Feldman U., 2003, ApJ, 595, 517
%theoretical energy levels: Griffin, D.C., Pindzola, M.S., Badnell, N.R., 2000, A&ASS, 142, 317
%Comment: Shirai,T., Sugar,J., Musgrove,A., Wiese,W.L., 2000, J.Phys.Chem.Ref.Data, Monograph 8 report
          an inversion of energies between levels 70 and 72 (ssame J). For consistency with Griffin 
          et al 2000, who adapted their atomic structure calculation to a set of observed energies
          identical to the NIST v.2 one, we use the NIST v.2 level ordering.
%Radiative data: Griffin, D.C., Pindzola, M.S., Badnell, N.R., 2000, A&ASS, 142, 317
%Radiative data n=5,6,7: Czyzak,S.J., Krueger,T.K., 1966, ApJ, 144, 381
%Radiative data 1 - 2 transition: Martin, W.C., Sugar, J., Musgrove, A., Dalton, G.R., 1999,
      NIST Database for Atomic Spectroscopy, Version 2.0, NIST Standard Reference Database 61
%Radiative data for levels with J=9/2, 11/2: calculated using SUPERSTRUCTURE, with the configurations
               3s2.3p6.3d, 3s2.3p5.3d2, 3s2.3p5.3d.4s, 3s2.3p6.4s, 3s2.3p6.4p, 3s2.3p6.4d, 3s2.3p6.4f,
               3s2.3p4.3d3, 3s2.3p3.3d4
%comment: SUPERSTRUCTURE radiative data have been corrected for the differences between experimental
          and SUPERSTRUCTURE transition wavelength differences, where experimental values were available.
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
% E.Landi - Nov 2004

fe_8.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_8.splups
%Oscillator strengths: Griffin, D.C., Pindzola, M.S., Badnell, N.R., 2000, A&ASS, 142, 317
%Effective collision strengths: Griffin, D.C., Pindzola, M.S., Badnell, N.R., 2000, A&ASS, 142, 317
%collision strengths and gf values n=5,6,7:  Czyzak,S.J., Krueger,T.K., 1966, ApJ, 144, 381
%comment: effective collision strengths were provided in the temperature range 4.5 < Log T < 6.5
%comment: added collisional data for transitions involving levels 21,25,28,29,39. They affect
          level populations at electron densities larger than 10^9 cm^-3 (June 2003).
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
% 
% Enrico Landi - June 2003

fe_8.splups (proton collisional data) Not available in this VERSION.

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

fe_8_table.html (html table)


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