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

ar_14.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, Phys. Scripta, 28, 483
%Observed energy levels (31,36,50,53,73,75,87,89,111,121): Lepson et al. 2003, ApJ, 590, 604
%Observed energy levels (96,112,113,122): Fawcett et al., 1971, J.Phys.B, 4, 986
%Theoretical energy levels (n=2): Zhang,H.L., Graziani,M., Pradhan,A.K., 1994, A&A, 283, 319
%theoretical energy levels (n=3): Sampson and Zhang, 1995, unpublished calculations
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
% K.P.Dere and E.Landi - Mar 2005
 

ar_14.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_14.wgfa
%observed energy levels (n=2): Edlen, B, 1983, Phys. Scripta, 28, 483
%Observed energy levels (31,36,50,53,73,75,87,89,111,121): Lepson et al. 2003, ApJ, 590, 604
%Observed energy levels (96,112,113,122): Fawcett et al., 1971, J.Phys.B, 4, 986
%comment: theoretical wavelengths agree with NIST observed wavelength on the order of 1- 10%
%oscillator strengths (n=3): Sampson and Zhang, 1995, unpublished calculations
%comment: gf and A values for transitions O5-K1 and O6-K2 are estimates
%oscillator strengths: Dankwort,W., Trefftz,E., 1978, A&A, 65, 93.
%oscillator strengths: Bhatia,A.K., Feldman,U., Seely,J.F., 1986, ADNDT, 35, 319.
%A values: Dere,K.P., Mason,H.E., Widing,K.G., Bhatia,A.K., 1979, ApJS, 40, 364.
%A values: Bhatia,A.K., Feldman,U., Seely,J.F., 1986, ADNDT, 35, 319.
% produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
% K.P.Dere and E.Landi - Mar 2005

ar_14.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_14.splups
%collision strengths: Zhang, H.L., Graziani, M., Pradhan, A.K., 1994, A&A, 283, 319
%oscillator strengths: Dankwort, W., Trefftz, E., 1978, A&A, 65, 93
% Comment: A small error was found in Zhang, H.L. et al 1994 upsilons, affecting
    upsilons for Al IX, Si X, S XII, Ar XIV, Ca XVI (and not lower-Z ions).
    The present data have been corrected by the authors.
% Comment: Zhang, H.L. et al 1994 upsilons are provided in the 1.7x10^4 to 8.5x10^6 K
    temperature range.
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
% Enrico Landi - Aug 2001

ar_14.psplups (proton collision data)

contains the spline fits to the scaled proton collision strengths.

 

%filename: ar_14.psplups
%rates: Foster VJ, Keenan FP, Reid RHG, ADNDT 67, 99, 1997
%energies: From .elvlc file, experimental energies
%comment: The rate coefficients are in units cm^3/s.
%comment: Fits valid for temperatures 5e5 to 1.5e7 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_14_table1.html (html table -- 23.6700 -- 29.9930 A)

ar_14_table2.html (html table -- 30.0150 -- 4414.4258 A)


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