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

al_9.elvlc (energy levels)

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

 
%energy levels (n=2): Edlen, B, 1983, Phys. Scripta, 28, 483
%energy levels (n=3): Martin,W.C., Sugar,J., Musgrove,A., Dalton,G.R., 1995, NIST Database Version 1.0.
%theoretical energy levels: Sampson and Zhang, 1995, unpublished calculations
%comment: observed energy of level 55 estimated by comparison with Sampson's values
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
% K.P.Dere and E.Landi 1999
 

al_9.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: al_9.wgfa
%energy levels (n=2): Edlen, B, 1983, Phys. Scripta, 28, 483
%energy levels (n=3): Martin,W.C., Sugar,J., Musgrove,A., Dalton,G.R., 1995, NIST Database Version 1.0
%oscillator strengths (n=3): Sampson and Zhang, 1995, unpublished calculations
%note:  gf and A values for transitions O5-K1 and O6-K2 are estimates                      
%oscillator strengths (1- 16): Dankwort, W., Trefftz, E., 1978, A&A, 65, 93.
%A-value (1-2): Tachiev, G., Froese Fischer, 2000, J.Phys.B, 33, 2419
%comment: Peter Young, 17-Jul-2006, changed ground transition
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
% K.P.Dere and E.Landi 1999

al_9.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: al_9.splups
%effective collision strengths (1-15): Zhang, H.L., Graziani, M., Pradhan, A.K., 1994, A&A, 283, 319
%oscillator strengths (1-15): Dankwort, W., Trefftz, E., 1978, A&A, 65, 93
%collision strengths (16-125): Zhang & Sampson 1995, unpublished calculations
% 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 6.4x10^3 to 3.2x10^6 K temperature range.
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
% Enrico Landi - Aug 2001

al_9.psplups (proton collision data)

contains the spline fits to the scaled proton collision strengths.

 

%filename: al_9.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 2e5 to 3.5e6 K.
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
% Peter Young   15-May-2001

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

al_9_table1.html (html table -- 49.3290 -- 78.3120 A)

al_9_table2.html (html table -- 78.3950 -- 20449.9355 A)


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