Cr XXI - VERSION 8.0


The CHIANTI database has the following primary ASCII files for this ion:

  1. cr_21.elvlc (energy levels)
  2. contains the energy levels (in cm-1). It includes both experimental and theoretical values of the levels energies.

     
    %filename: cr_21.elvlc
    %Experimental 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: Zhang, Sampson, ADNDT, 1992, 52, 143
    %produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
    %
    % Enrico Landi 1997
     
    

  3. cr_21.wgfa (radiative data)
  4. contains wavelengths, gf and A values of the transitions. The wavelengths are based on the experimental energy levels and should be the best available. Wavelengths calculated from the theoretical energies are of an indeterminate accuracy and their values are presented as negative values of the calculated wavelength.

     
    %filename: cr_21.wgfa
    %Experimental 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.
    %Allowed transitions oscillator strengths: Zhang, Sampson, ADNDT, 1992 , 52, 143
    %forbidden A values 1-4,3-4: Muhlethaler, Nussbaumer, AA, 1976, 48, 109.
    %produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
    %
    % Enrico Landi 1997
    

  5. cr_21.scups (electron collision data)
  6. contains the effective electron collision strengths scaled according to the rules formulated by Burgess and Tully (1992).

     
    %filename: cr_21.splups
    %oscillator strengths: Zhang, Sampson, 1992, ADNDT, 52, 143
    %collision strengths: Zhang, Sampson, 1992, ADNDT, 52, 143
    %produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
    %
    % Enrico Landi 1997
    
    

  7. cr_21.psplups (proton collision data)
  8. contains the spline fits to the scaled proton collision strengths.

     
    
    %filename: cr_21.psplups
    %rates: Ryans R.S.I., Foster-Woods V.J, Copeland F., Keenan F.P., Matthews A., Reid R.H.G., 1998, ADNDT 70, 179-229
    %energies: Bhatia A.K., Feldman U., Seely J.F., 1986, ADNDT 35, 449-472
    %comment: Fits valid for temperatures 2e6 to 4e8 K.
    %produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
    %
    % Peter Young  24-Oct-00
    


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

    cr_21_table.html (html table)

    Page created by Giulio Del Zanna on Fri Sep 18 13:25:50 2015