Al IX - VERSION 5.1

The CHIANTI database consists of 4 primary ASCII files for each ion in the database.

• al_9.elvlc (energy levels)

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

  References:

  %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  %theoretical energy levels: Sampson and Zhang, 1995, unpublished calculations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 for each transition. Wavelengths are based on experimental level energies where available; wavelengths calculated from theoretical energies are less accurate and are given as negative values.

  References:

  %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  %oscillator strengths (n=3): Sampson and Zhang, 1995, unpublished calculations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.
  %oscillator strengths  (1-2): Bhatia,A.K., Feldman,U., Seely,J.F., 1986, ADNDT, 35, 319.
  %produced as part of the Arcetri/Cambridge/NRL 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 to 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.

  References:

  
  %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  %collision strengths (16-125): Zhang & Sampson 1995, unpublished calculations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 (electron collision data)

  contains the spline fits to the scaled proton collision strengths.

  References:

  
  %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
  

  
  

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

  
  

• al_9_table1.html (html table -- part 1)

• al_9_table2.html (html table -- part 2)