Al VIII - VERSION 10.1


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

  1. al_8.elvlc (energy levels)
  2. contains the energy levels (in cm-1). It includes both experimental and theoretical values of the levels energies.

     
     
    Theoretical energies:
    
    Mao, J. , Badnell, N. R., Del Zanna, G., 2020, A&A, 634, A7
    DOI:  10.1051/0004-6361/201936931 
    
    Note: only 482 bound levels have been retained.
    
    Observed energies:
    
    levels 3,5,6 from SUMER measurements by 
    Feldman, U. & Doschek, G.A., (2007) Atomic Data and Nuclear Data Tables 93, 779
    
    Other levels:
    NIST Atomic Spectra Database, (ver. 5.7.1), [Online].
    https://physics.nist.gov/PhysRefData/ASD/levels_form.html
    
    Note: several NIST energies were uncertain and were not included.
    
    Produced as part of the 'CHIANTI' atomic data base collaboration by
    Giulio Del Zanna, June 2020
    
    
     -1
     
    

  3. al_8.wgfa (radiative data)
  4. 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.

     
    
    gf-values, A-values and theoretical energies:
    
    Mao, J. , Badnell, N. R., Del Zanna, G., 2020, A&A, 634, A7
    DOI:  10.1051/0004-6361/201936931 
    
    Note: only  bound levels have been retained.
    
    Only transition probabilities with a branching ratio
    greater than 10^(-5) have been retained.
    
    gf-values, A-values for the ground configuration 2s2 2p2 and  the 2s 2p3 are from the
    MCHF calculation by
    G. Tachiev and C. Froese Fischer,  (energy adjusted), 2001, Can. J. Phys. 79,955
    http://adsabs.harvard.edu/abs/2001CaJPh..79..955T
    
    Observed energies:
    
    levels 3,5,6 from SUMER measurements by 
    Feldman, U. & Doschek, G.A., (2007) Atomic Data and Nuclear Data Tables 93, 779
    
    Other levels:
    NIST Atomic Spectra Database, (ver. 5.7.1), [Online].
    https://physics.nist.gov/PhysRefData/ASD/levels_form.html
    
    Note: several NIST energies were uncertain and were not included.
    
    Produced as part of the 'CHIANTI' atomic data base collaboration by
    Giulio Del Zanna, June 2020
    
     
    %File processed with wgfa_tidy by pryoung on 31-May-2023
    

  5. al_8.scups (electron collision data)
  6. contains the effective electron collision strengths scaled according to the rules formulated by Burgess and Tully (1992).

     
    
    Giulio Del Zanna, June 2020
    Produced as part of the 'CHIANTI' atomic data base collaboration by
    
    Note: only  482 bound levels have been retained.
    
    DOI:  10.1051/0004-6361/201936931 
    Mao, J. , Badnell, N. R., Del Zanna, G., 2020, A&A, 634, A7
    
    oscillator strengths and effective collision strengths:
    
    
    

  7. (proton collisional data) Not available in this VERSION.

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

    Page created by Giulio Del Zanna on Mon Jun 26 11:13:51 2023