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The CHIANTI database consists of 4 primary ASCII files for each ion in the database.
contains the energy levels in cm^(-1) It includes both experimental data and theoretical values of the levels energies.
References:
%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 %energy levels (12,16): Khardi et al, 1994, Physica Scripta, 49, 571 %energy levels: Martin, W.C., Zalubas, R., Musgrove, A., 1990, J.Phys.Chem.Ref.Data, 19, 821 %Theoretical energy levels (n=2): Zhang, Sampson, ADNDT, 1992, 52, 143 %theoretical energy levels (n=3): Sampson, D.H., Goett, S.J., Clark, R.E.H., 1984, ADNDT, 30, 125 %comment: level 18 has been relabeled 2p3p 1P1, j=1 %produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration % % E. Landi 1997
contains wavelengths, gf and A values for each transition. Wavelengths are based on experimental level energies where available; wavelengths calculated from theoretical energies are less accurate and are given as negative values.
References:
%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 (12,16): Khardi et al, 1994, Physica Scripta, 49, 571 %theoretical energy levels (n=3): Sampson, D.H., Goett, S.J., Clark, R.E.H., 1984, ADNDT, 30, 125 %Allowed transitions oscillator strengths (n=2): Zhang, Sampson, 1992, ADNDT, 52, 143 %oscillator strengths: forbidden transitions (n=2): Muhlethaler, Nussbaumer, 1976, A&A, 48, 109 %Allowed transitions oscillator strengths (n=3): Sampson, D.H., Goett, S.J., Clark, R.E.H., 1984, ADNDT, 30, 125 %comment: level 18 has been relabeled 2p3p 1P1, j=1 %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. %produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration % % E.Landi (n=2) and K.P.Dere (n=3) - 1997
contains the spline fits to the electron collision strengths scaled according to 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.
References:
%filename: s_13.splups %oscillator strengths (n=2): Zhang, Sampson, 1992, ADNDT, 52, 143 %oscillator strengths (n=3): Sampson, D.H., Goett, S.J., Clark, R.E.H., 1984, ADNDT, 30, 125 %effective collision strengths (1 - 10): Keenan, F.P., 1988, Phys.Scripta, 37, 57 %collision strengths (n=3): Sampson, D.H., Goett, S.J., Clark, R.E.H., 1984, ADNDT, 30, 125 %produced as part of the Arcetri/Cambridge/NRL atomic data base collaboration CHIANTI %comment: Have derived the upsilon data from Table III of Keenan 1988. The Delta-E's have been taken from the observed values in the .elvlc file. The gf values are from the .wgfa file. %comment: the effective collision strengths have been calculated in the temperature range 5.6 < Log T < 7.2 % % Enrico Landi March 2001 (n=2); n=3 levels added by K. Dere 6/97
contains the spline fits to the scaled proton collision strengths.
References:
%filename: s_13.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: 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: Fits valid for temperatures 5e5 to 7.5e7 K. %produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration % % Peter Young 24-Oct-00