Fe XXI - VERSION 4.0

The CHIANTI database consists of 4 primary ASCII files for each ion in the database.

• fe_21.elvlc (energy levels)

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

  References:

  %experimental energy levels: Shirai,T., Sugar,J., Musgrove,A., Wiese,W.L.,2000, J.Phys.Chem.Ref.Data, Monograph 8
  %experimental energy levels (35,43,47,48): Mason et al., 1979, A&A, 73, 74
  %observed energy levels configs. 4d,5d: Bromage, G.E., et al, 1977, Culham Lab. Report, CLM-R 170
  %observed energy level 289: Shirai,T., Sugar,J., Musgrove,A., Wiese,W.L., 2000, J.Phys.Chem.Ref.Data, Monograph 8
  %observed energy level 278, 284: Kelly, 1987, J.Phys.Chem.Ref.Data, 16, Suppl.1
  %Observed energy levels (38,39,42,58,60,84,144,149): identifications from the X-ray spectral line list 
     by Brown et al., 2002, ApJS, 140, 589
  %theoretical energy levels (1-200): Badnell, N.R., Griffin, D.C., 2001, J.Ph.B, 34, 681
  %theoretical energy levels (201-274): Zhang, H.L., Sampson, D.H., 1997, ADNDT, 65, 183
  %Theoretical energy levels (275-290): Phillips et al, 1996, ApJ, 466, 549
  %Comments:
   1 - The observed energies for levels 38 and 44 (2p3d 3D2, 1D2) have been interchanged to match theoretical energies
   2 - The observed energies for 5d levels 278 (1D2) and 287 (3P2) have been interchanged to match theoretical energies
   3 - Level 289 (5d 1F3) was misidentified in Bromage et al, and its energy has been attributed to level 279 (5d 3F3)
  %
  %produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
  %
  % E. Landi Aug 2002
  

  
  

• fe_21.wgfa (radiative data)

  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:

  %Experimental energy levels: Shirai,T., Sugar,J., Musgrove,A., Wiese,W.L.,2000, J.Phys.Chem.Ref.Data, Monograph 8
  %experimental energy levels (35,43,47,48): Mason et al., 1979, A&A, 73, 74
  %observed energy levels configs. 4d,5d: Bromage, G.E., et al, 1977, Culham Lab. Report, CLM-R 170
  %observed energy level 289: Shirai,T., Sugar,J., Musgrove,A., Wiese,W.L., 2000, J.Phys.Chem.Ref.Data, Monograph 8
  %observed energy level 278, 284: Kelly, 1987, J.Phys.Chem.Ref.Data, 16, Suppl.1
  %Observed energy levels (38,39,42,58,60,84,144,149): identifications from the X-ray spectral line list
     by Brown et al., 2002, ApJS, 140, 589
  %Theoretical energy levels (1-200): Badnell, N.R., Griffin, D.C., 2001, J.Phys.B, 34, 681
  %Theoretical energy levels (201-274): Zhang, H.L., Sampson, D.H., 1997, ADNDT, 65, 183
  %Theoretical energy levels (275-290): Phillips et al, 1996, ApJ, 466, 549
  %Radiative data: Badnell, N.R., Griffin, D.C., 2001, J.Phys.B, 34, 681
  %Radiative data within ground configuration: P.R.Young, SUPERSTRUCTURE calculations, 1996
  %Radiative data 2p33l (except 2p33s 5S2 and 3S1, coming from Badnell): 
      Zhang, H.L., Sampson, D.H., 1997, ADNDT, 65, 183
  %Radiative data n=5 levels: Phillips et al, 1996, ApJ, 466, 549
  % produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
  %
  % Enrico Landi Aug 2002
  

  
  

• fe_21.splups (electron collision data)

  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_21.splups
  %oscillator strengths (1-200): Badnell, N.R., Griffin, D.C., 2001, J.Phys.B, 34, 681
  %effective collision strengths (1-200): Badnell, N.R., Griffin, D.C., 2001, J.Phys.B, 34, 681
  %oscillator strengths (201-274): Zhang, H.L., Sampson, D.H., 1997, ADNDT, 65, 183
  %collision strengths (201-274): Zhang, H.L., Sampson, D.H., 1997, ADNDT, 65, 183
  %oscillator strengths, A values n=4,5 (275-290): Phillips et al, 1996, ApJ, 466, 549
  %collision strengths n=4,5 (275-290): Phillips et al, 1996, ApJ, 466, 549
  %comment: Effective collision strengths for levels 1-200 are used in the temperature range 6.3 < Log T < 7.9
  % produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
  %
  % E.Landi Apr 2001
  

  
  

• fe_21.psplups (electron collision data)

  contains the spline fits to the scaled proton collision strengths.

  References:

  
  %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
  

The html tables below contain the radiative data of all the lines sorted in wavelength