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

ar_11.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 levels): Edlen, B., 1983, Phys. Scripta, 28, 51
%observed energy levels (levels 17,18,19): Curdt, Landi, Feldman, 2004, A&A, 427, 1045
%observed energy levels (25,64,67,77,81,83,84,85): Kelly, R.L., 1987, J.Phys.Chem.Ref.Data 16, Suppl. 1
%observed energy levels (11,14,15,37,51,54,71,73,82): Lepson, J.K., Beiersdorfer, P., Behar, E., Kahn, S.M., 2003, ApJ, 590, 604
%observed energy levels (12,13,16,26,40,52,56,66,68,69,72,74,86): Fawcett, B.C., Gabriel, A.H., Paget, T.M., 1971, J.Phys.B, 4, 986
%theoretical energy levels: Landi, E., Bhatia, A.K., 2006, ADNDT, 92, 305
%comment: theoretical energy levels come from the 24-configuration calculation in Bhatia & Landi (2006)
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
% 
% E. Landi - Jan 2005
 

ar_11.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: ar_11.wgfa
%observed energy levels (n=2 levels): Edlen, B., 1983, Phys. Scripta, 28, 51
%observed energy levels (levels 17,18,19): Curdt, Landi, Feldman, 2004, A&A, 427, 1045
%observed energy levels (25,64,67,77,81,83,84,85): Kelly, R.L., 1987, J.Phys.Chem.Ref.Data 16, Suppl. 1
%observed energy levels (11,14,15,37,51,54,71,73,82): Lepson,J.K., Beiersdorfer,P., Behar,E., Kahn,S.M., 2003, ApJ, 590, 604
%observed energy levels (12,13,16,26,40,52,56,66,68,69,72,74,86): Fawcett, B.C., Gabriel, A.H., Paget, T.M., 1971, J.Phys.B, 4,986
%theoretical energy levels: Landi, E., Bhatia, A.K., 2006, ADNDT, 92, 305
% A and gf values: Landi, E., Bhatia, A.K., 2006, ADNDT, 92, 305
%comment: theoretical energy levels and all radiative data come from the 24-configuration calculation in Bhatia & Landi (2006)
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
% E. Landi - Feb 2005

ar_11.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: ar_11.splups
%Oscillator strengths: Bhatia & Landi 2006, ADNDT, 92, 305
%Collision strengths: Bhatia & Landi 2006, ADNDT, 92, 305
%comment: oscillator strengths have been taken from the 6-configuration model of Bhatia & Landi 
    (2006) for consistency with the collisional calculation
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
% E. Landi - Jan 2005

ar_11.psplups (proton collision data)

contains the spline fits to the scaled proton collision strengths.

 

%filename: ar_11.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 5e5 to 1.1e7 K.
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
% Peter Young   15-May-2001

---

The html tables below contain the radiative data of the brightest lines sorted in wavelength

ar_11_table1.html (html table -- 33.5040 -- 631.5150 A)

ar_11_table2.html (html table -- 711.5000 -- 25960.5391 A)


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