Ar IV - VERSION 8.0


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

  1. ar_4.elvlc (energy levels)
  2. contains the energy levels (in cm-1). It includes both experimental and theoretical values of the levels energies.

     
    %filename: ar_4.elvlc
    %experimental energy levels: Fuhr, J.R., Kelleher, D.E., Martin, W.C., Musgrove, A., Sugar, J., Wiese, W.L.,
            Dalton, G.R., Dragoset, R.A., Mohr, P.J., Olsen, K., Reader, J., Saloman, E.B., Sansonetti, C.J.,
            Wiersma, G., "NIST Atomic Spectra Database" Ver. 2.0, March 1999, NIST Physical Reference Data.
    % Theoretical energy levels: Ramsbottom et al 1997, MNRAS, 284, 754
    %produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
    %
    % E.Landi - Aug 2001
     
    

  3. ar_4.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: ar_4.wgfa
    %experimental energy levels: Fuhr, J.R., et al., "NIST Atomic Spectra Database" Ver. 2.0, 
          March 1999, NIST Physical Reference Data.
    % Theoretical energy levels: Ramsbottom et al 1997, MNRAS, 284, 754
    % Radiative data: SUPERSTRUCTURE calculation, including 25 configurations.
    % Comment: the configurations included in the SUPERSTRUCTURE calculation are:
    
               3s2.3p3, 3s2.3p2.3d, 3s2.3p.3d2, 3s2.3d3
               3s.3p4, 3s.3p3.3d, 3s.3p2.3d2, 3s.3p.3d3
               3p2.3d3, 3p3.3d2, 3p4.3d, 3p5
               3s2.3p3.4l with l=s,p,d,f
               3s.3p3.4l  with l=s,p,d,f
               3p4.4l     with l=s,p,d,f
    
               Radiative data have been calculated using experimental energy values.
    
    %produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
    % 
    % Enrico Landi - Aug 2001
    

  5. ar_4.scups (electron collision data)
  6. contains the effective electron collision strengths scaled according to the rules formulated by Burgess and Tully (1992).

     
    %filename: ar_4.splups
    %Oscillator strengths: SUPERSTRUCTURE calculation, including 25 configurations.
    %Effective collision strengths ground configuration: Ramsbottom et al 1997, MNRAS, 284, 754
    %Effective collision strengths other configurations: Ramsbottom & Bell, 1997, 66, 65
    % Comment: the configurations included in the SUPERSTRUCTURE calculation are:
    3s2.3p3, 3s2.3p2.3d, 3s2.3p.3d2, 3s2.3d3
    3s.3p4, 3s.3p3.3d, 3s.3p2.3d2, 3s.3p.3d3
    3p2.3d3, 3p3.3d2, 3p4.3d, 3p5
    3s2.3p3.4l with l=s,p,d,f
    3s.3p3.4l  with l=s,p,d,f
    3p4.4l     with l=s,p,d,f
    Radiative data have been calculated using experimental energy values.
    %Comment: the collisional data are provided in the temperature range 3.0 < Log T < 6.0
    %Comment: correction (June 2003): added collisional transitions including levels 17 and 25.
    They slightly affect the population balance at electron densities > 10^12 cm^-3.
    % produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
    %
    % Enrico Landi - Jun 2003
    
    

  7. (proton collisional data) Not available in this VERSION.

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

    ar_4_table.html (html table)

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