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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 (level 2): Kelly, D.M., & Lacy, J.H., 1995, ApJ, 454, L161 %energy levels (level 3): Kelly, D.M., & Lacy, J.H., 1995, ApJ, 454, L161 %energy levels (level 3): Feuchtgruber, H., Lutz, D.A., Beintema, E.A. et al., 1997, ApJ, 487, 962 %energy levels (level 4): Young, P.R., Dupree, A.K., Espey, B.R., & Kenyon, S.J., 2006, ApJ, 650, 1091 %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. %Theoretical energy levels: Bhatia, A.K., Doschek, G.A., 1995, ADNDT, 60, 145 %comment: the Kelly & Lacy and Feuchtgruber measurements are combined to give the level 3 energy % produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration % % P.R. Young - 3-Dec-2007
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: mg_7.wgfa %energy levels (level 2): Kelly, D.M., & Lacy, J.H., 1995, ApJ, 454, L161 %energy levels (level 3): Kelly, D.M., & Lacy, J.H., 1995, ApJ, 454, L161 %energy levels (level 3): Feuchtgruber, H., Lutz, D.A., Beintema, E.A. et al., 1997, ApJ, 487, 962 %energy levels (level 4): Young, P.R., Dupree, A.K., Espey, B.R., & Kenyon, S.J., 2006, ApJ, 650, 1091 %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. %Theoretical energy levels: Bhatia, A.K.,Doschek, G.A., ADNDT, 60, 145, 1995 %oscillator strengths: Bhatia, A.K., Doschek, G.A.,1995, ADNDT, 60, 145 %A-values (2-4 and 3-4 transitions): Storey PJ, Zeippen CJ, MNRAS 312, 813, 2000 %A-values (other ground transitions): Galavis, M.E., Mendoza, C., Zeippen, C.J., 1997, A&AS, 123, 159 %comment: the Kelly & Lacy and Feuchtgruber measurements are combined to give the level 3 energy % produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration % % P.R. Young - 3-Dec-2006
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: mg_7.splups
%oscillator strengths: Bhatia, A.K., Doschek, G.A., 1995, ADNDT, 60, 145
%upsilons (ground configuration, levels 1 to 5): Lennon, D.J., Burke, V.M., 1994, A&AS, 103, 273
%upsilons (ground configuration, levels 1 to 5): Aggarwal, K, 1984, Sol. Phys., 94, 75
%upsilons (ground configuration, levels 1 to 5): Aggarwal, K, 1984, ApJS, 56, 303
%collision strengths (all other transitions): Bhatia, A.K., Doschek, G.A., 1995, ADNDT, 60, 145
%comment: The Lennon & Burke upsilons are tabulated between logT=3.0-5.0, and the
T_max of Mg VII is 5.7. The Aggarwal data go up to logT=7.7. I've thus
used all of the Lennon & Burke data and appended the Aggarwal data for
temperatures logT=5.2-7.6. It was necessary to scale the Aggarwal by
the ratio of the Lennon & Burke data to the Aggarwal data at logT=5.0
to ensure a smooth join between the two data-sets. The scale factor
varied from 0.82 (4-5) to 1.19 (1-5).
The fits to the ground configuration upsilons are accurate to 1.2% over
the temperature range logT=3.8-6.2.
% produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
% P.R. Young and E.Landi - 3-Dec-2007
contains the spline fits to the scaled proton collision strengths.
%filename: mg_7.psplups %rates: Ryans R.S.I., Foster-Woods V.J, Keenan F.P., Reid R.H.G., 1999, ADNDT 73, 1-42 %energies: CHIANTI database, ver.1, Dere et al., A&AS 125, 149, 1997 %comment: Fits valid for temperatures 1.5e5 to 1.5e7 K. %produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration % % Peter Young 10-Sep-2002