Fe XXIII d - VERSION 4.0

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

• fe_23d.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: Martin, W.C., Sugar, J., Musgrove, A., Dalton, G.R., 1995, 
     NIST Database for Atomic Spectroscopy, Version 1.0, NIST Standard Reference Database 61.
  %theoretical energy levels: Bhatia, A.K., private communications
  %energy levels (above IP): calculations of Safronova reported in Kato et al., 1997, ADNDT, 67, 225.
  %comment: energies have been corrected (Sep 2003). This affects the position of all wavelengths, now
            in much better agreement with observations.
  %produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
  %
  % Ken Dere and Enrico Landi - Sep 2003
  

  
  

• fe_23d.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: Martin, W.C., Sugar, J., Musgrove, A., Dalton, G.R., 1995, 
     NIST Database for Atomic Spectroscopy, Version 1.0, NIST Standard Reference Database 61
  %theoretical energy levels: Sampson, D.H., Goett, S.J., Clark, R.E.H., 1984, ADNDT, 30, 125
  %comment:  several NIST observed energy levels have been changed.
                old value    new value      
        2p3d 3F2  9646000     9638000
             3D2  9728000     9646000
             1D2  9638000     9728000
             3P2  9753000     9753000
  %oscillator strengths (n=2): Bhatia, 1996, unpublished calculations
  %oscillator strengths (from n=3 to n=2): Sampson, D.H., Goett, S.J., Clark, R.E.H., 1984, ADNDT, 30, 125
  %comment:  gf values for transitions 19-26 and 23-26 were simply taken to be
     equal to the O V gf values reported by Hibbert, 1980, J. Phys. B, 13, 1721.
     The A values were obtained from the gf values by using the wavelengths listed.
  %A values (above IP):  calculations of Safronova reported in Kato et al., 1997, ADNDT, 67, 225.
  %comment:  theoretical wavelengths of Kato/Safronova are used as observed wavelengths (positive values)
  %comment:      1    2        0.           0.000e+00      1.000e+07 2S2           1 S0.0 2S2P          3 P0.0  a fix      
  %comment: theoretical energies have been used as experimental values for the dielectronic transitions
  %comment: level energies and wavelengths have been corrected (Sep 2003). This affects the position of all 
            wavelengths, now in much better agreement with observations.
  %produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
  %
  %  Ken Dere and Enrico Landi - Sep 2003
  

  
  

• fe_23d.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_23d.splups
  %collision strength values from calculations of Safronova reported in Kato et al., 1997, ADNDT, 67, 225
  %produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
  %
  % Ken Dere - Aug 1999
  

  
  

• fe_23d.psplups (electron collision data) - Not Present in CHIANTI 4

  contains the spline fits to the scaled proton collision strengths.