The CHIANTI database consists of the following primary ASCII files for this ion:

mg_5.elvlc (energy levels)

contains the energy levels in cm^(-1) It includes both experimental and theoretical values of the levels energies.

 
%observed energy levels (n=2): Edlen, B., 1983, Phisica Scripta, 28, 51
%observed energy levels (n=3): Fuhr, J.R., et al., "NIST Atomic Spectra Database" Ver. 2.0, March 1999, NIST Physical Reference Data
%theoretical energy levels: Landi E. & Bhatia A.K., 2006, ADNDT, 92, 105
%comment: theoretical energies come from the 24-configuration calculation of Landi & Bhatia
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
% 
%E. Landi - Feb 2004
 

mg_5.wgfa (radiative data)

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_5.wgfa
%observed energy levels (n=2): Edlen, B., 1983, Phisica Scripta, 28, 51
%observed energy levels (n=3): Fuhr, J.R., et al., "NIST Atomic Spectra Database" Ver. 2.0, March 1999, NIST Physical Referenc
e Data
%theoretical energy levels: Landi E. & Bhatia A.K., 2006, ADNDT, 92, 105
%A values and oscillator strengths: Landi E. & Bhatia A.K., 2006, ADNDT, 92, 105
%comment: theoretical energies, oscillator strengths and A values come from the 24-configuration calculation of Landi & Bhatia
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
%  E. Landi - Feb 2004

mg_5.splups (electron collision data)

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_5.splups
%Oscillator strengths: Landi E. & Bhatia A.K. 2006, ADNDT, 92, 105
%effective collision strengths ground configuration T<10^5 :Butler, K., Zeippen, C.J., A&ASS, 1994, 108, 1
%effective collision strengths ground configuration T>10^6 : Landi E. & Bhatia A.K. 2006, ADNDT, 92, 105
%Collision strengths all other transitions: Landi E. & Bhatia A.K. 2006, ADNDT, 92, 105
%comment: close-coupling effective collision strengths from Butler & Zeippen have been merged
    with effective collision strengths derived from Bhatia A.K. & Landi, since Butler & Zeippen
    provide data only up to 10^5 K. This approximate treatment influences most the
    transitions within the ground term 3P, and less those involving the 1D and 1S singlets.
%comment: oscillator strengths come from the 6-configuration calculation of Landi & Bhatia, for
    consistency with the collision strengths calculation
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
% E. Landi - Apr 2004

mg_5.psplups (proton collision data)

contains the spline fits to the scaled proton collision strengths.

 

%filename: mg_5.psplups
%rates: Ryans R.S.I., Keenan F.P., Reid R.H.G., unpublished.
%energies: Observed values, from .elvlc file
%comment: Fits valid for temperatures 8e4 to 4e6 K.
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
% Peter Young   15-May-2001

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The html table below contains the radiative data of the brightest lines sorted in wavelength

mg_5_table.html (html table)


Last revised by G. Del Zanna on 4-Sep-2009