Fe XXI - VERSION 5.1

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:

  %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, ApJ, in press
  %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, 2005, ApJ, in press
  %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 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 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, ApJ, in press
  %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, 2005, ApJ, in press
  %A and gf values (below ionization): Landi & Gu, 2005, ApJ, in press
  %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 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 (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, 2005, ApJ, in press
  %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 (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 table below contains the radiative data of the brightest lines sorted in wavelength

  
  

• fe_21_table1.html (html table -- part 1)

• fe_21_table2.html (html table -- part 2)

• fe_21_table3.html (html table -- part 3)

• fe_21_table4.html (html table -- part 4)