CHIANTI

An Atomic Database for Spectroscopic Diagnostics of Astrophysical Plasmas.

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Naval Research Laboratory (USA) - Rutherford Appleton Laboratory (UK)
University of Cambridge (UK) - George Mason University (USA) - Universita' degli Studi di Firenze (Italy)

Ar XV - VERSION 6.0

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

  1. ar_15.elvlc (energy levels)

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

     
%observed energy levels (1-10): Edlen, B., 1983, Phys. Scr., 28, 51
%observed energy levels (6,7,8): Edlen, B., 1985, Phys. Scr., 32, 86
%observed energy levels (level 15): Lepson et al., 2003, ApJ, 590, 604
%Observed energy levels (n=3): Khardi et al, 1994, Physica Scripta, 49, 571
%Theoretical energy levels: 27-conf model from Bhatia & Landi, 2008, ADNDT, 94, 223
% produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
%  E. Landi - Dec 2006

  2. ar_15.wgfa (radiative data)

    3. 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_15.elvlc
%observed energy levels (1-10): Edlen, B., 1983, Phys. Scr., 28, 51
%observed energy levels (6,7,8): Edlen, B., 1985, Phys. Scr., 32, 86
%observed energy levels (level 15): Lepson et al., 2003, ApJ, 590, 604
%Observed energy levels (n=3): Khardi et al, 1994, Physica Scripta, 49, 571
%Theoretical energy levels: 27-conf model from Bhatia & Landi, 2008, ADNDT, 94, 223
%Oscillator strengths and A values: Bhatia & Landi, 2008, ADNDT, 94, 223
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
%  E. Landi - Dec 2006

  3. ar_15.splups (electron collision data)

    4. 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_15.splups
%Oscillator strengths: Bhatia & Landi 2008, ADNDT, 94, 223
%effective collision strengths (levels 1-10): Keenan, 1988, Physica Scripta, 37, 57
%Collision strengths (levels 11-92): Bhatia & Landi 2008, ADNDT, 94, 223
%Comment: effective collision strengths were given in the 5.7 < log T < 7.3 temperature range.
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
% Enrico Landi - May 2009

  4. ar_15.psplups (proton collision data)

    5. contains the spline fits to the scaled proton collision strengths. 

     

%file: ar_15.psplups
%rates: Ryans R.S.I., Foster-Woods V.J, Copeland F., Keenan F.P., Matthews A., Reid R.H.G., 1998, ADNDT 70, 179-229
%energies: Bhatia A.K., Feldman U., Seely J.F., 1986, ADNDT 35, 449-472
%comment: Fits valid for temperatures 8e5 to 1.75e8 K.
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
% Peter Young  24-Oct-00

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

    ar_15_table.html (html table)


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