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

ca_20.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., Sugar, J., Musgrove, A., Dalton, G.R., 1995, 
   NIST Database for Atomic Spectroscopy, Version 1.0, NIST Standard Reference Database 61.
%comment:   44117410      Limit
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
% K.P.Dere 1999
 

ca_20.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 Database for Atomic Spectroscopy, Version 1.0, NIST Standard Reference Database 61.
%A values: Parpia, F.A., Johnson, W.R., 1982, Phys.Rev.A, 26, 1142.
%oscillator strengths: Wiese, W.L., Smith, M.W., Glennon, B.M., 1966, Atomic Transition Probabilities, NSRDS-NBS-4.
%note:  hydrogenic f values
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
% K.P.Dere 1998

ca_20.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: ca_20.splups
%oscillator strengths: Wiese,W.L., Smith,M.W., Glennon,B.M., 1966, Atomic Transition Probabilities, NSRDS-NBS-4
%comment: hydrogenic oscillator strengths values
%effective collision strengths: Aggarwal,K.M., Kingston, A.E., 1992, J. Phys. B, 25, 751 
%comment: fine structure collision assumes LS coupling or distribution according to statistical weights
%comment: effective collision strengths were provided in the temperature range 5.0 < Log T < 7.2
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
% Ken Dere - Aug 1998

ca_20.splups (proton collisional data) Not available in this VERSION.

ca_20.reclvl (total recombination population rates)

 
%filename: ca_20.reclvl
%Radiative recombination rates: Mewe, R, Gronenschild, E.H.B.M, and van den Oord, G.H.J, 1982, A&AS, 62, 197
%produced as part of the Arcetri/Cambridge/NRL CHIANTI atomic data base collaboration
%
% E. Landi - Jan 2005

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

ca_20_table.html (html table)


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