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: http://www.arcetri.astro.it/science/chianti/chianti_5.1/database/al/al_13.html
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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:
%observed energy levels: Martin, W. C., Sugar, J., Musgrove, A., and Dalton, G. R., 1995, NIST Database for Atomic Spectroscopy, Version 1.0, NIST Standard Reference Database 61. %comment: 18584144 Limit %comment: theoretical levels are the same as the observed ones. %produced as part of the Arcetri/Cambridge/NRL atomic data base collaboration CHIANTI % % K.P.Dere 2001
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:
%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 % % Ken Dere 1998
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: al_13.splups %oscillator strengths: Wiese,W.L., Smith,M.W., Glennon,B.M., 1966, Atomic Transition Probabilities, NSRDS-NBS-4 %oscillator strengths: Parpia, F.A., Johnson, W.R., 1982, Phys.Rev.A, 26, 1142 %collision strengths: interpolation of R-matrix calculations of C VI, Ne X, Si XIV, Ca XX and Fe XXVI %comment: the original data used for the interpolation were from the calculations of Aggarwal & Kingston (1991 to 1993). The range of temperature for which upsilons were provided was different for each ion, however, the interpolated results should be most reliable in the 4.2 < Log T < 6.2. %produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration % % K.P. Dere Aug 1998