CHIANTI

An Atomic Database for Spectroscopic Diagnostics of Astrophysical Plasmas.

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Naval Research Laboratory (USA) - Rutherford Appleton Laboratory (UK)
University of Cambridge (UK) - George Mason University (USA) - Universita' degli Studi di Firenze (Italy)

Si XII - VERSION 6.0

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

  1. si_12.elvlc (energy levels)

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

     
%observed energy levels (1-24): Martin, W.C., Zalubas, R., 1983, J. Phys. Chem. Ref. Data, 12, 323.
%Innershell observed energy levels: Fuhr, J.R., et al., "NIST Atomic Spectra Database" Ver. 2.0, 
   March 1999, NIST Physical Reference Data
%Theoretical energy levels (1-24): Zhang,H.L., Sampson,D.H., Fontes,C.J., ADNDT, 44, 31.
%Innershell theoretical energy levels: Goett, S.J., Sampson, D.H., 1983, ADNDT, 29, 535
% produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
% E. Landi - July 1999

  2. si_12.wgfa (radiative data)

    3. 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_12.wgfa
%observed energy levels: Martin, W.C. Zalubas, R., 1983, J.Phys.Chem.Ref.Data, 12, 323
%Theoretical energy levels: Zhang,H.L., Sampson,D.H., Fontes,C.J., 1990, ADNDT, 44, 31
%Innershell 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
%Innershell theoretical energy levels: Goett, S.J., Sampson, D.H., 1983, ADNDT, 29, 535
%oscillator strengths:  H.L.Zhang, D.H.Sampson, C.J.Fontes, 1990, ADNDT, 44, 31
%oscillator strengths:  Martin, I., Karwowski, J., Diercksen, G.H.F., Barrientos, C., 1993, A&AS, 100, 595
%Innershell radiative data: Goett, S.J., Sampson, D.H., 1983, ADNDT, 29, 535
%Comment: Other radiative data were calculated using SUPERSTRUCTURE with a 23 configuration model
%A values (autoionizing): Vainshtein, L.A., Safronova, U.I., 1978, ADNDT, 21, 49
   and 1980, ADNDT, 25, 311 - updated by U.I. Safronova, 1999
% produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
% 
%  E. Landi and K.P. Dere - Nov 1999

  3. si_12.splups (electron collision data)

    4. contains the spline fits to the electron collision strengths scaled according the rules formulated by 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. 

     

%filename: si_12.splups
%oscillator strengths: H.L.Zhang, D.H.Sampson, C.J.Fontes, 1990, ADNDT, 44, 31
%oscillator strengths innershell transitions: Goett, S.J., Sampson, D.H., 1983, ADNDT, 29, 535
%collision strengths: Zhang, Sampson, Fontes, 1990, ADNDT, 44, 31
%collision strengths innershell transitions: Goett, S.J., Sampson, D.H., 1983, ADNDT, 29, 535
% produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
% E.Landi and K.P.Dere, July 1999

  4. si_12.splups (proton collisional data) Not available in this VERSION.

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

    si_12_table.html (html table)


    Last revised by G. Del Zanna on 4-Sep-2009