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

fe_21.elvlc (energy levels)

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

 
%Observed energy levels (2,4): Feldman, U., Curdt, W., Landi, E., Wilhelm, K., 2000, ApJ, 544, 508
%Observed energy levels (3,5 to 21): Feldman, U., Curdt, W., Landi, E., Wilhelm, K., 2000, ApJ, 544, 508 and 
           Fuhr, J.R., et al., "NIST Atomic Spectra Database" Ver. 2.0, March 1999, NIST Physical Reference Data
%Observed energy levels (28,36,37,39,40,42,46,47,57,60,83,144,148): Brown et al., 2002, ApJS, 140, 589
%Observed energy levels (56,74,81,459): Fuhr, J.R., et al., "NIST Atomic Spectra Database" Ver. 2.0, 
           March 1999, NIST Physical Reference Data
%Observed energy levels (246,247,248,261,266,410,460): Fawcett et al, 1987, MNRAS, 225, 1013
%Observed energy levels (22,35,73,86,276,296,387,408,409,457): From the line list of Landi & Phillips, 2005, ApJS, 160, 286
%observed energy levels (above ionization): Palmeri P., Mendoza C., Kallman T.R., Bautista M.A., 2003, A&A, 403, 1175
%Theoretical energy levels (below ionization): 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
%comment: theoretical energy levels from Palmeri 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
%
% Enrico Landi - Mar 2005
 

fe_21.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_21.wgfa
%Observed energy levels (2,4): Feldman, U., Curdt, W., Landi, E., Wilhelm, K., 2000, ApJ, 544, 508
%Observed energy levels (3,5 to 21): Feldman, U., Curdt, W., Landi, E., Wilhelm, K., 2000, ApJ, 544, 508 and
           Fuhr, J.R., et al., "NIST Atomic Spectra Database" Ver. 2.0, March 1999, NIST Physical Reference Data
%Observed energy levels (28,36,37,39,40,42,46,47,57,60,83,144,148): Brown et al., 2002, ApJS, 140, 589
%Observed energy levels (56,74,81,459): Fuhr, J.R., et al., "NIST Atomic Spectra Database" Ver. 2.0,
           March 1999, NIST Physical Reference Data
%Observed energy levels (246,247,248,261,266,410,460): Fawcett et al, 1987, MNRAS, 225, 1013
%Observed energy levels (22,35,73,86,276,296,387,408,409,457): From the line list of Landi & Phillips, 2005, ApJS, 160, 286
%observed energy levels (above ionization): Palmeri P., Mendoza C., Kallman T.R., Bautista M.A., 2003, A&A, 403, 1175
%Theoretical energy levels (below ionization): Landi & Gu, 2006, ApJ, 640, 1171
%A and gf values (below ionization): Landi & Gu, 2006, ApJ, 640, 1171
%Radiative data (above ionization): Palmeri P., Mendoza C., Kallman T.R., Bautista M.A., 2003, A&A, 403, 1175
%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
%
% Enrico Landi - Mar 2005

fe_21.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_21.splups
%oscillator strengths (levels 1-158,162,164,166,171,237-274): Badnell, N.R., Griffin, D.C., 2001, J.Phys.B, 34, 681
%gf values other levels: computed with the Flexible Atomic Code - Gu, M.F., 2003, ApJ, 582, 1241
%gf values (above ionization): Bautista, M.A., Mendoza, C., Kallman, T.R., Palmeri, P., 2004, A&A, 418, 1171
%effective collision strengths (levels 1-158,162,164,166,171,237-274): Badnell,N.R., Griffin,D.C., 2001,J.Phys.B, 34, 681
%effective collision strengths (level 170): Gu, M.F., 2003, ApJ, 582, 1241
%Collision strengths (all other levels): Landi & Gu, 2006, ApJ, 640, 1171
%collisional data (above ionization): Bautista, M.A., Mendoza, C., Kallman, T.R., Palmeri, P., 2004, A&A, 418, 1171
%comment: Effective collision strengths from Badnell & Griffin 2001 are used in the T range 2e6 < T < 7.9e7
%comment: Effective collision strengths from the Flexible Atomic Code are given in the T range 1.16e6< T < 5.8e7
%comment: data from Badnell & Griffin have been adapted to the level ordering given by the Flexible Atomic Code
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
% Enrico Landi - Mar 2005

fe_21.psplups (proton collision data)

contains the spline fits to the scaled proton collision strengths.

 

%filename: fe_21.psplups
%rates: Ryans R.S.I., Foster-Woods V.J, Keenan F.P., Reid R.H.G., 1999, ADNDT 73, 1-42
%energies: CHIANTI database, ver.1, Dere et al., A&AS 125, 149, 1997
%comment: Fits valid for temperatures 1.5e6 to 1.5e8 K.
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
% Peter Young   10-Sep-2002

fe_21.reclvl (total recombination population rates)

 
%filename: fe_21.reclvl
%Total recombination 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

fe_21.cilvl (collisional ionization population rates)

 
%filename: fe_21.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_21_table1.html (html table -- 8.5192 -- 11.8929 A)

fe_21_table2.html (html table -- 11.9038 -- 12.7993 A)

fe_21_table3.html (html table -- 12.8014 -- 25.0167 A)

fe_21_table4.html (html table -- 25.0253 -- 2298.0042 A)


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