Ca XIII - VERSION 11.0.1


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

  1. ca_13.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.,2021, A&A, 653, A81
    "R-matrix electron-impact excitation data for the O-like iso-electronic sequence"
    DOI:  10.1051/0004-6361/202141464
    
    
    Note: only  bound levels have been retained.
    
    Observed energies:
    
    level 2 from Edlen, 1983, Ph. Scr., 28, 51
    levels 4,5 from  the wavelength measured by
    Feldman, Curdt, Landi, Wilhelm, 2000, ApJ, 544, 508
    
    level (11): from the spectrum of Acton et al 1985, ApJ, 291, 865
    
    Dubious id in CHIANTI from Doschek et al 1973, J.Opt.Soc.Am, 63, 1463
    for the 3s levels 25,26
    
    
    Other levels:
    NIST Atomic Spectra Database,[Online].
    https://physics.nist.gov/PhysRefData/ASD/levels_form.html
    
    Produced as part of the 'CHIANTI' atomic data base collaboration by
    Giulio Del Zanna, Mar 2023
    
    
     -1
     
    

  3. ca_13.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., 2021, A&A, 653, A81
    "R-matrix electron-impact excitation data for the O-like iso-electronic sequence"
    DOI:  10.1051/0004-6361/202141464
    
    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 lowest 10 levels:
     Song, C. X.; Zhang, C. Y. ; Wang, K.; Si, R.; Godefroid, M.; Jonsson, P. ; Dang, W. ; Zhao, X. H. ; Yan, J. ; Chen, C. Y., 2021, Atomic Data and Nuclear Data Tables, 138, 101377
    "Extended calculations with spectroscopic accuracy: Energy levels and
    radiative rates for O-like ions between Ar XI and Cr XVII"
    DOI: 10.1016/j.adt.2020.101377
    
    Observed energies:
    
    level 2 from Edlen, 1983, Ph. Scr., 28, 51
    levels 4,5 from  the wavelength measured by
    Feldman, Curdt, Landi, Wilhelm, 2000, ApJ, 544, 508
    
    level (11): from the spectrum of Acton et al 1985, ApJ, 291, 865
    
    Dubious id in CHIANTI from Doschek et al 1973, J.Opt.Soc.Am, 63, 1463
    for the 3s levels 25,26
    
    
    Other levels:
    NIST Atomic Spectra Database,[Online].
    https://physics.nist.gov/PhysRefData/ASD/levels_form.html
    
    Produced as part of the 'CHIANTI' atomic data base collaboration by
    Giulio Del Zanna, Mar 2023
    
     
    %File processed with wgfa_tidy by pryoung on 31-May-2023
    

  5. ca_13.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, Mar 2023                                                       
    Produced as part of the 'CHIANTI' atomic data base collaboration by              
    
    Note: only  bound levels have been retained.                                     
    
    
    DOI:  10.1051/0004-6361/202141464                                                
    "R-matrix electron-impact excitation data for the O-like iso-electronic sequence"
    Mao, J., Badnell, N. R., Del Zanna, G., 2021, A&A, 653, A81                      
    
    oscillator strengths and effective collision strengths:                          
    
    

  7. ca_13.psplups (proton collision data)
  8. contains the spline fits to the scaled proton collision strengths.

     
    
    %filename: ca_13.psplups
    %rates: Ryans R.S.I., Keenan F.P., Reid R.H.G., unpublished.
    %energies: Observed values, from .elvlc file
    %comment: Fits valid for temperatures 7e5 to 1.2e7 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

    Page created by Giulio Del Zanna on Wed Apr 16 17:42:30 2025