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

al_6.elvlc (energy levels)

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

 
%experimental 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.
%theoretical energy levels: extrapolated using NeIII,MgV,SiVII,S IX,ArXI,CaXIII.
%produced as part of the Arcetri/Cambridge/NRL CHIANTI atomic data base collaboration
%
% Enrico Landi 1997
 

al_6.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.

 
%experimental energy levels: Martin, W.C., Sugar, J., Musgrove, A. and Dalton, G.R.,
   1995,NIST Database for Atomic Spectroscopy, Version 1.0, NIST Standard Reference Database 61.
%allowed transition oscillator strengths: Fawcett, 1986, ADNDT, 34, 215
%ground level transition probabilities: Galavis, Mendoza, Zeippen, 1997, AASS, 123, 159
%other A values: interpolated using NeIII,MgV,SiVII,S IX,ArXI,CaXIII.
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
% Enrico Landi 1997

al_6.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_6.splups
%effective collision strengths ground levels: Butler and Zeippen, 1994, AASS, 108, 1
%effective collision strengths allowed trans.: interpolated using Ne III,Mg V,Si VII,S IX,Ar XI,Ca XIII
%comment: data are most accurate in the 3.0 < Log T < 5.0 temperature range.
% produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
% Enrico Landi 1997

al_6.psplups (proton collision data)

contains the spline fits to the scaled proton collision strengths.

 

%filename: al_6.psplups
%rates: Landman, D.A., ApJ 240, 709, 1980
%energies: Observed energies from CHIANTI .elvlc file
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
% Peter Young   8-Jun-2001

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

al_6_table.html (html table)


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