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

s_8.elvlc (energy levels)

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

 
%observed energy levels: Martin, W.C. and Zalubas, R., 1983, J. Phys. Chem. Ref. Data, 12, 323.
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
%  K.P.Dere 1995
 

s_8.wgfa (radiative data)

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.

 
%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 1995

s_8.splups (electron collision data)

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: s_8.splups
%oscillator strengths: Blackford, H.M.S., Hibbert, A., 1994, ADNDT, 58, 101
%collision strengths: Mohan, M., Baluja, K.L., Hibbert, A., 1987, J.Phys.B, 20, 2565
%collision strengths: Saraph, H.E., Tully, J.A., 1994, A&AS, 107, 29
%comment: effective collision strengths were provided in the temperature range 3.5 < Log T < 5.5
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
%  K.P.Dere 1995

s_8.psplups (proton collision data)

contains the spline fits to the scaled proton collision strengths.

 

%filename: s_8.psplups
%rates: Foster V.J., Keenan F.P., Reid R.H.G., 1994, ADNDT 58, 227
%energies: Cheng K.T., Kim Y.-K., Desclaux J.P., 1979, ADNDT 24, 111
%comment: Fit valid for temperatures 1e5 to 6e6 K.
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
% Peter Young   16-May-2001

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

s_8_table.html (html table)


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