Si VI - VERSION 5.1

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

• si_6.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. and Zalubas, R., 1983, J.Phys.Chem.Ref.Data, 12, 323.
  %theoretical energy levels: Bhatia, unpublished calculations
  % produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
  %
  %   K.P. Dere, Oct. 1995
  

  
  

• si_6.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 Standard Reference Database 61, NIST Database for Atomic Spectroscopy, Version 1.0
  %transition probabilities (1-2): Martin, W.C., Sugar, J., Musgrove, A., Dalton, G.R., 1995, 
     NIST Standard Reference Database 61, NIST Database for Atomic Spectroscopy, Version 1.0
  %transition probabilities: Blackford, H.M.S., Hibbert, A., 1994, ADNDT, 58, 101
  % produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
  %
  %    K.P. Dere - Oct 1995
  

  
  

• si_6.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: si_6.splups
  %oscillator strengths: Blackford, H.M.S., Hibbert, A., 1994, ADNDT, 58, 101
  %effective collision strengths: Saraph, H.E., Tully, J.A., 1994, A&AS, 107, 29
  %collision strengths: Mohan, M., Le Dourneuf, M., 1990, A&A, 227, 285
  %comment: effective collision strengths were provided in the temperature range 3.0 < Log T < 5.25
  %produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
  %
  %    K.P. Dere - Oct 1995
  

  
  

• si_6.psplups (electron collision data)

  contains the spline fits to the scaled proton collision strengths.

  References:

  
  %filename: si_6.psplups
  %rates: Bely, O., Faucher, P., 1970, A&A 6, 88
  %energies: Observed energies from .elvlc file.
  %produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
  %
  % Peter Young   25-May-2001
  

  
  

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

  
  

• si_6_table.html (html table)