Ti XVIII - VERSION 5.1

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

• ti_18.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 : Edlen,B., 1983, Ph. Scr. 28, 483
  %theoretical energy levels: Zhang, Sampson, 1994, ADNDT, 56, 41.
  % Produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
  %
  % Enrico Landi 1999
  

  
  

• ti_18.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 : Edlen,B., 1983, Ph. Scr. 28, 483
  %Allowed transitions oscillator strengths: Zhang, Sampson, 1994, ADNDT, 56, 41
  %intercombination transitions oscillator strengths: Zhang, Sampson, 1994, ADNDT, 56, 41
  %Forbidden transition 1-2: Bhatia, Feldman, Seely, 1986, ADNDT, 35, 319
  %produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
  %
  %  Enrico Landi - 1999
  

  
  

• ti_18.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: ti_18.splups
  %oscillator strengths: Zhang, Sampson, 1994, ADNDT, 56, 41
  %collision strengths: Zhang, Sampson, 1994, ADNDT, 56, 41
  %produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
  %
  % Enrico Landi 1997
  

  
  

• ti_18.psplups (electron collision data)

  contains the spline fits to the scaled proton collision strengths.

  References:

  
  %filename: ti_18.psplups
  %rates: Foster VJ, Keenan FP, Reid RHG, ADNDT 67, 99, 1997
  %energies: From .elvlc file, experimental energies
  %comment: The rate coefficients are in units cm^3/s.
  %comment: Fits valid for temperatures 8e5 to 3e7 K.
  %produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
  %
  % Peter Young   15-May-2001
  

  
  

  The html table below contains the radiative data of the brightest lines sorted in wavelength

  
  

• ti_18_table.html (html table)