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 III - VERSION 6.0

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

  1. ar_3.elvlc (energy levels)

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

     
%Observed energies: Ver. 3.0.3 of the online NIST database. http://physics.nist.gov/PhysRefData/ASD/index.html
%Theoretical energies: No theoretical energies available.
% produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
%  Peter Young   -   3-Jun-2006

  2. ar_3.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_3.wgfa
%Observed energies: Ver. 3.0.3 of the online NIST database. http://physics.nist.gov/PhysRefData/ASD/index.html
%A-values: Biemont, E., & Hansen, J.E., 1986, Physica Scripta, 34, 116
% produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
%    Peter Young   -   5-Jun-2006

  3. ar_3.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_3.splups
%Theoretical energies: No theoretical energies available - observed energies from .elvlc file used instead.
%Upsilons: Galavis, M.E., Mendoza, C., Zeippen, C.J., 1995, A&AS, 111, 347
%comment: The original upsilons were tabulated over the range 10^3 - 10^5 K. The CHIANTI fits reproduce the data to within 0.28 %.
% produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
%    Peter Young  -  5-Jun-2006

  4. ar_3.splups (proton collisional data) Not available in this VERSION.

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

    ar_3_table.html (html table)


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