Si VIII - VERSION 8.0


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

  1. si_8.elvlc (energy levels)
  2. contains the energy levels (in cm-1). It includes both experimental and theoretical values of the levels energies.

     
    %filename: si_8.elvlc
    %Observed energy levels (1-15): Edlen, 1984, Phys.Scripta, 30, 135 
    %Observed energy levels (16-72): 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
    %Observed energy levels (24-27; 43-46 -> 2s2.2p2(3P)3p 4D and 2s2.2p2(3P)3d 4F): Kink, I., 
            Engstroem, L., Feldman, U., 1999, ApJ, 512, 496
    %Theoretical energy levels (1-15): Zhang, Sampson, ADNDT, 1999, 72, 153
    %Theoretical energy levels (16-72): Bhatia & Landi, 2003, ADNDT, 85, 317
    %produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
    %
    % E. Landi and G. Del Zanna, 2001
     
    

  3. si_8.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: si_8.wgfa
    %Observed energy levels (1- 15): Edlen, 1984, Phys.Scripta, 30, 135
    %Observed energy levels (16-72): Fuhr, J.R., et al., "NIST Atomic Spectra Database" Ver. 2.0, March 1999, 
          NIST Physical Reference Data
    %Observed energy levels (24-27; 43-46 -> 2s2.2p2(3P)3p 4D and 2s2.2p2(3P)3d 4F): Kink, I., Engstroem, L., 
          Feldman, U., 1999, ApJ, 512, 496
    % A values for transitions within the ground configuration: Merkelis et al., 1999, Physica Scripta 59,122
    % gf values for transitions between the (1- 15) levels: Zhang, Sampson, ADNDT, 1999, 72, 153
    % A values for transitions with 2s.2p4 and 2p5 levels: Zhang, Sampson, ADNDT, 1999, 72, 153
    % A values for forbidden transitions with n=2 configurations: Merkelis et al., 1999, Physica Scripta 59,122
    % Oscillator strengths and A values levels 16-72: Bhatia & Landi, 2003, ADNDT, 85, 317
    %produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
    %
    % E. Landi and G. Del Zanna 2001
    

  5. si_8.scups (electron collision data)
  6. contains the effective electron collision strengths scaled according to the rules formulated by Burgess and Tully (1992).

     
    %filename: si_8.splups
    %oscillator strengths (1 - 15): Zhang, Sampson, 1999, ADNDT, 72, 153
    %oscillator strengths (16 - 72): Bhatia & Landi, 2003, ADNDT, 85, 317
    %effective collision strengths within the ground configuration: Bell, Matthews and Ramsbottom, 2001, MNRAS 322, 779
    %collision strengths all other transitions within levels 1 - 15: Zhang, Sampson, 1999, ADNDT, 72, 153
    %collision strengths (16 - 72): Bhatia & Landi, 2003, ADNDT, 85, 317
    %comment: transition energies within the ground configuration: Edlen, 1984, Phys.Scripta, 30, 135
    %comment: effective collision strengths were provided in the temperature range 3.3 < Log T < 6.5
    %produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
    %
    % E. Landi and G. Del Zanna, Dec 2001
    
    

  7. si_8.psplups (proton collision data)
  8. contains the spline fits to the scaled proton collision strengths.

     
    
    %file: si_8.psplups
    %energy levels: Bhatia & Landi, 2003, ADNDT, 85, 317
    %proton rates: Bhatia & Landi, 2003, ADNDT, 85, 317
    %produced as part of the Arcetri/Cambridge/NRL atomic data base collaboration 'CHIANTI'
    %
    % Enrico Landi Jul 2001
    


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

    si_8_table.html (html table)

    Page created by Giulio Del Zanna on Fri Sep 18 13:29:47 2015