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: http://www.arcetri.astro.it/science/chianti/chianti_5.1/database/fe/fe_7.html
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The CHIANTI database consists of 4 primary ASCII files for each ion in the database.
contains the energy levels in cm^(-1) It includes both experimental data and theoretical values of the levels energies.
References:
%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
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 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
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_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