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

ar_17.elvlc (energy levels)

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

 
%observed energy levels: Martin,W.C., Sugar,J., Musgrove,A., Dalton,G.R., 1995,
     NIST Database for Atomic Spectroscopy, Version 1.0, NIST Standard Reference Database 61.
%observed energy levels (1s2p 3P): Chen, M.H., Cheng, K.T., Johnson, W.R., 1993, Ph.Rev.A, 47, 3692
%theoretical energy levels: Sampson, D.H., Goett, S.J., Clark, R.E.H., 1983, ADNDT, 29, 467
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration CHIANTI
%
% K.P.Dere and E.Landi 2000
 

ar_17.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_17.wgfa
%observed energy levels: Martin,W.C., Sugar,J., Musgrove,A., Dalton,G.R., 1995,
     NIST Database for Atomic Spectroscopy, Version 1.0, NIST Standard Reference Database 61.
%observed energy levels (1s2p 3P): Chen, M.H., Cheng, K.T., Johnson, W.R., 1993, Ph.Rev.A, 47, 3692
%theoretical energy levels: Sampson, D.H., Goett, S.J., Clark, R.E.H., 1983, ADNDT, 29, 467
%oscillator strengths up to transition 3-37: Sampson, D.H., Goett, S.J., Clark, R.E.H., 
     1983, ADNDT, 29, 467,  Hydrogenic values
%A values (1-2,5,6; 2-4,5,6): Lin, C. D., Johnson, W.R., Dalgarno, A., Phys Rev A, 1977, 15, 154
%A values (1-3, 2-phot): Drake, G.W.F., Phys Rev A, 1986, 34, 2871
%oscillator strengths from transition 4-8 on: Wiese, W.L., Smith, M.W., Glennon, B.M., 
     1966, Atomic Transition Probabilities, NSRDS-NBS-4.
%comment: hydrogenic f values
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
% K.P.Dere and E.Landi - Jan 2005

ar_17.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_17.splups
%oscillator strengths: (levels up to 31): Whiteford et al 2001, J. Phys. B, 34, 3179
%oscillator strengths: (levels above 31): Zhang, H., Sampson, D.H., 1987, ApJSS, 63, 487
%Effective collision strengths (levels up to 31): Whiteford et al 2001, J. Phys. B, 34, 3179
%Effective collision strengths (levels above 31): Zhang, H., Sampson, D.H., 1987, ApJSS, 63, 487
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
%   G. Del Zanna  -   May 30 2006

ar_17.splups (proton collisional data) Not available in this VERSION.

ar_17.reclvl (total recombination population rates)

 
%filename: ar_17.reclvl
%Radiative recombination rates: Mewe, R, Gronenschild, E.H.B.M, and van den Oord, G.H.J, 1982, A&AS, 62, 197
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
% E. Landi - Aug 2006

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

ar_17_table.html (html table)


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