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The CHIANTI database consists of the following primary ASCII files for this ion:
contains the energy levels in cm^(-1) It includes both experimental and theoretical values of the levels energies.
%energy levels: J. Sugar, C. Corliss, 1985, J.Phys.Chem.Ref.Data., 14, Supplement 2 %energy levels (11,12,17,18,19,20,22,23,24,25,26,29): Kelly, R.L., 1987, J.Phys.Chem.Ref.Data, 16, Suppl. 1 %Theoretical energy levels (n=2): Dufton, P.L., Kingston, A.E., Scott, N.S., 1983, J.Phys.B, 16, 3053 %theoretical energy levels (n=3): Sampson,D.H., Goett, S.J., Clark, R.E.H., 1984, ADNDT, 30, 125 %comment: energy levels assigned by comparison with observed spectra, K. Dere - Nov. 1999 13 %produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration % % n=2 levels: E.Landi May 2001; n=3 levels: K.P.Dere Jun 1997
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.
%observed energy levels (11,12,17,18,19,20,22,23,24,25,26,29):
Kelly, R.L., 1987, J.Phys.Chem.Ref.Data, 16, Suppl. 1.
%theoretical energy levels (n=2): Dufton, P.L., Kingston, A.E., Scott, N.S., 1983, J.Phys.B, 16, 3053
%theoretical energy levels Sampson,D.H., Goett, S.J., Clark, R.E.H., 1984, ADNDT, 30, 125.
%oscillator strengths allowed transitions: Zhang, H.L., Sampson, D.H., 1992, ADNDT, 52, 43
%oscillator strengths forbidden transitions: Muhlethaler & Nussbaumer, 1976, A&A, 48, 109
%oscillator strengths (11-46): Sampson, D.H., Goett, S.J., Clark, R.E.H., 1984, ADNDT, 30, 125
%comment: gf values for transitions 19-26 and 23-26 were simply taken to be
equal to the O V gf values reported by Hibbert, 1980, J. Phys. B, 13, 1721.
The A values were obtained from the gf values by using the wavelengths listed.
%comment: identified transitions based on comparison with observed spectra, K. Dere - Nov. 1999
1 13 - 19.606 2.761e-01 1.597e+12 A1 2s2 1S0.0 - 2s.3p 3P1.0 I1
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
% n=2 levels: E.Landi May 2001; n=3 levels: K.P.Dere Jun 1997
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_17.splups %Oscillator strengths (1 - 10): Dufton, P.L., Kingston, A.E., Scott, N.S., 1983, J.Phys.B, 16, 3053 %Effective collision strengths (1 - 10): Dufton, P.L., Kingston, A.E., Scott, N.S., 1983, J.Phys.B, 16, 3053 %oscillator strengths and collision strengths (11-46): Sampson, D.H., Goett, S.J., Clark, R.E.H., 1984, ADNDT, 30, 125 % comment: effective collision strengths were given in the temperature range 6.4 < Log T < 7.2 %produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration % % n=2: Enrico Landi May 2001; n=3: K.P.Dere Jun 1997
contains the spline fits to the scaled proton collision strengths.
%filename: ca_17.psplups %rates: Ryans R.S.I., Foster-Woods V.J, Copeland F., Keenan F.P., Matthews A., Reid R.H.G., 1998, ADNDT 70, 179-229 %energies: Bhatia A.K., Feldman U., Seely J.F., 1986, ADNDT 35, 449-472 %comment: Fits valid for temperatures 1e6 to 2e8 K. %produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration % % Peter Young 24-Oct-00