Fe IX - VERSION 4.0

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

• fe_9.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: NIST Database for Atomic Spectroscopy, Version 1.0, NIST Standard Reference Database 61, 1995
  %theoretical energy levels: Fawcett & Mason, ADNDT 47, 17 (1991)
  %produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration 
  %
  %  P.R. Young  Feb. 1996.
  

  
  

• fe_9.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: NIST Database for Atomic Spectroscopy, Version 1.0, 
      NIST Standard Reference Database 61, 1995
  %A values: from a 10 configuration model of Fe IX used in "superstructure"
  %comment: the following configurations were used in the model:
  
  	3s2 3p6, 3s2 3p5 3d, 3s 3p6 3d
  	3s 3p5 3d2, 3s2 3p4 3d2, 3s0 3p6 3d2, 3p3 3d3
  	3s2 3p5 {4s, 4p, 4d, 4f}
  
    Observed energy values were used to compute the A values.
  
    The most significant differences over a 3 conf model for Fe IX are that
    the gf value for the 171.07 transition is reduced to 2.933 (i.e. 25% lower
    than previously). This will be reflected in the collision strengths for
    this transition.
  % produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
  %
  %  P.R. Young, Feb 95
  

  
  

• fe_9.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_9.splups
  %oscillator strengths: SUPERSTRUCTURE calculations (see fe_9.wgfa for details)
  %collision strengths: Fawcett & Mason, 1991, ADNDT 47, 17
  %comments:
      The transitions up from the ground were fitted and
      presented in Mason, 1994, ADNDT, 57, 305
  
      The few remaining unfitted transitions don't
      affect the level balance.
  
      Have scaled the 1 - 13 omegas by the ratio of the superstructure to
      the FM oscillator strengths. See the .wgfa file for detail.
  % produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
  %
  % P.R. Young, Feb 95
  

  
  

• fe_9.psplups (electron collision data) - Not Present in CHIANTI 4

  contains the spline fits to the scaled proton collision strengths.

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