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

fe_7.elvlc (energy levels)

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

 
%observed energies: Fuhr et al., 1999, NIST Atomic Spectra Database Version 2.0
%theoretical energies: Berrington, K.A., Nakazaki, S., Norrington, P.H., 2000, A&AS, 142, 313
% produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
% P.R.Young - 15-Feb-2004
 

fe_7.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 energies: Fuhr et al., 1999, NIST Atomic Spectra Database Version 2.0
%A-values: Berrington, K.A., Nakazaki, S., Norrington, P.H., 2000, A&AS, 142, 313
%comment:
     The following A-values were incorrect in the Berrington et al. (2000)
     paper and have been corrected (K.A. Berrington, 2004, private communication)

i-i'   A(correct)    (in paper)
1-4   .372            3.25
1-7   .0150            .174
4-7   .182             .191

     The following table lists those transitions for which the new
     A-values (A_2) are more than 30% different from the previous
     CHIANTI A-values (Nussbaumer & Storey 1982).

  i  j       wvl       A_1       A_2   %diff
  1  5  4989.954 9.37e-002 1.35e-001   44.08
  1  6  4894.748 3.55e-002 5.02e-002   41.41
  2  6  5160.341 5.25e-002 7.62e-002   45.14
  3  7  5277.862 4.96e-002 7.35e-002   48.19
  4  6 33845.598 4.37e-002 5.72e-002   30.89
  4  8  8732.268 1.23e-003 4.14e-003  236.59
  7  8 13074.140 1.74e-005 4.54e-005  160.92

%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
%  P.R. Young - 19-Feb-2004

fe_7.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_7.splups
%energies: Berrington, K.A., Nakazaki, S., Norrington, P.H., 2000, A&AS, 142, 313
%effective collision strengths: Berrington, K.A., Nakazaki, S., Norrington, P.H., 2000, A&AS, 142, 313
%comment:
     The authors estimate that their upsilons are accurate to no better
     than 20%. Note that there are large differences (factors 2-3) over
     the previous R-matrix calculation (Keenan & Norrington 1987, 1991)
     which are attributed to the much larger model used by Berrington et al.

     The CHIANTI fits reproduce the original upsilons to an accuracy of <1.4%.
%comment: effective collision strengths were provided in the temperature range 4.3 < logT < 6.0.
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
%  P.R.Young - 15-Feb-2004

fe_7.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_7_table.html (html table)


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