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

c_2.elvlc (energy levels)

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

 
%energy levels:  Moore, C. E., Tables of Spectra of Hydrogen, Carbon,
  Nitrogen, and Oxygen Atoms and Ions, J. W. Gallagher ed., CRC Press, 1993.
% Theoretical energy levels: Zhang, H.L., Graziani, M., Pradhan, A.K., 1994, A&A, 283, 319.
%comment:  energy levels renumbered 
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration 
%
% K.P.Dere 1994
 

c_2.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.

 
%filename: c_2.wgfa
%observed energy levels: Kelly, R.L., 1987, J.Phys.Chem.Ref.Data 16, Suppl. 1.
%observed 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.
%comment: energy levels renumbered 
%oscillator strengths:  Dankwort, W., Trefftz, E., 1978, A&A, 65, 93.
%oscillator strengths:  Lennon, D.J., Dufton, P.L., Hibbert, A., Kingston, A.E., 1985, ApJ, 294, 200.      
%oscillator strengths:  Nussbaumer, H., and Storey, P. J., 1981, A&A, 96, 91.                           
%oscillator strengths and A values:  Wiese W.L., Fuhr J.R., 1995, NIST Database
 for Atomic Spectroscopy, Version 1.0, NIST Standard Reference Database 61.
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration CHIANTI
%
%  K.P.Dere and E.Landi 2003

c_2.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: c_2.splups
%oscillator strengths: Dankwort, W., Trefftz, E., 1978, A&A, 65, 93
%oscillator strengths: Lennon, D.J., Dufton, P.L., Hibbert, A., Kingston, A.E., 1985, ApJ, 294, 200
%oscillator strengths: Nussbaumer, H., Storey, P.J., 1981, A&A, 96, 91
%effective collision strengths: Blum, R.D., Pradhan, A.K., 1992, ApJS, 80, 425
%comment: effective collision strengths were given in the 3.0 < Log T < 4.6 temperature range
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
%  K.P. Dere  -  1994

c_2.psplups (proton collision data)

contains the spline fits to the scaled proton collision strengths.

 

%filename: c_2.psplups
%rates: Foster VJ, Keenan FP, Reid RHG, ADNDT 67, 99, 1997
%energies: From .elvlc file, experimental energies
%comment: The rate coefficients are in units cm^3/s.
%comment: Fits are valid for temperatures 2e3 to 4e5 K.
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
% Peter Young   15-May-2001

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

c_2_table.html (html table)


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