The CHIANTI database has 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.
Theoretical energies: Mao, J. , Badnell, N. R., Del Zanna, G., 2020, A&A, 634, A7 DOI: 10.1051/0004-6361/201936931 Note: only bound levels have been retained. Observed energies: Levels 2-4: Young, P.R., 2023, ApJ, 958, 40 Levels 5,6: Feldman, U. & Doschek, G.A., Atomic Data and Nuclear Data Tables 93 (2007) 779–806 Levels 14,15: Young, P.R., 2023, ApJ, 958, 40 Other levels: NIST Atomic Spectra Database, (ver. 5.7.1), [Online]. https://physics.nist.gov/PhysRefData/ASD/levels_form.html Note: several NIST eneergies are not relative to the ground state or are uncertain. Only those of the lowest levels have been retained. Produced as part of the 'CHIANTI' atomic data base collaboration by Giulio Del Zanna, June 2020 7-Mar-2024, Peter Young: updated observed energies for levels 2-4 and 14,15. -1
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.
gf-values, A-values and theoretical energies: Mao, J. , Badnell, N. R., Del Zanna, G., 2020, A&A, 634, A7 DOI: 10.1051/0004-6361/201936931 Note: only 450 bound levels have been retained. Only transition probabilities with a branching ratio greater than 10^(-5) have been retained. gf-values, A-values for the lowest 15 levels: MCHF calculation by G. Tachiev and C. Froese Fischer, (energy adjusted), 2001, Can. J. Phys. 79,955 http://adsabs.harvard.edu/abs/2001CaJPh..79..955T Observed energies: Levels 2-4: Young, P.R., 2023, ApJ, 958, 40 Levels 5,6: Feldman, U. & Doschek, G.A., Atomic Data and Nuclear Data Tables 93 (2007) 779–806 Levels 14,15: Young, P.R., 2023, ApJ, 958, 40 NIST Atomic Spectra Database, (ver. 5.7.1), [Online]. https://physics.nist.gov/PhysRefData/ASD/levels_form.html Note: several NIST eneergies are not relative to the ground state or are uncertain. Only those of the lowest levels have been retained. Produced as part of the 'CHIANTI' atomic data base collaboration by Giulio Del Zanna, June 2020 7-Mar-2024, Peter Young: updated using new elvlc file.
contains the effective electron collision strengths scaled according to the rules formulated by Burgess and Tully (1992).
Giulio Del Zanna, June 2020 Produced as part of the 'CHIANTI' atomic data base collaboration by Note: only 450 bound levels have been retained. DOI: 10.1051/0004-6361/201936931 Mao, J. , Badnell, N. R., Del Zanna, G., 2020, A&A, 634, A7 oscillator strengths and effective collision strengths:
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
Page created by Giulio Del Zanna on Wed Apr 16 17:43:25 2025