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The CHIANTI database consists of the following primary ASCII files for this ion:
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
%Experimental energy levels (3,4,5,6,35,36,40): Landi, E. & Young, P.R., 2009, ApJ, submitted
%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.
The energies for 3p5.3d2 4DJ (levels 3-6) have been updated using the
lines observed between 253.9 and 255.8 angstroms in Hinode/EIS spectra.
The energy for 3p5.3ds 2G7/2 (levels 40) has been updated using the
line observed at 206.78 angstroms by Hinode/EIS. The theoretical
splitting for the doublet has been used to update the theoretical
energy for level 39 (2G9/2).
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
% E.Landi and P.R.Young - Nov 2008
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_8.wgfa
%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
%Experimental energy levels (3,4,5,6,35,36,40): Landi, E. & Young, P.R., 2009, ApJ, submitted
%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 (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 and P.R.Young - Nov 2008
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