Ca XV - VERSION 10.0.2


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

  1. ca_15.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 
    
    Observed energies:
    
    
    NIST Atomic Spectra Database, (ver. 5.7.1), [Online].
    https://physics.nist.gov/PhysRefData/ASD/levels_form.html
    
    Produced as part of the 'CHIANTI' atomic data base collaboration by
    Giulio Del Zanna, July 2020
    
     -1
     
    

  3. ca_15.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 
    
    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
    ab-inition MCHF calculation by G. Tachiev (2004), following 
     G. Tachiev and C. Froese Fischer,  (energy adjusted), 2001, Can. J. Phys. 79,955
    http://adsabs.harvard.edu/abs/2001CaJPh..79..955T
    
    Observed energies:
    
    NIST Atomic Spectra Database, (ver. 5.7.1), [Online].
    https://physics.nist.gov/PhysRefData/ASD/levels_form.html
    
    
    Produced as part of the 'CHIANTI' atomic data base collaboration by
    Giulio Del Zanna, July 2020
    
    

  5. ca_15.scups (electron collision data)
  6. contains the effective electron collision strengths scaled according to the rules formulated by Burgess and Tully (1992).

     
    %  E.Landi and P.R.Young 2000
    %
    %produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
    %comment: effective collision strengths were given in the temperature range 5.0 < Log T < 7.0.
    %comment: the authors regard their collisional model to be accurate to ~10%. 
    %effective collision strengths (transitions 1 - 15): Aggarwal, Berrington & Keenan, 1991, ApJS, 77, 441
    %collision strengths transitions 6-46 : Bhatia, A.K., Doschek, G.A., 1993, ADNDT, 53, 195
       'HF+2p4' oscillator strengths found in Aggarwal, 1983, J.Phys.B, 16, 2231
       configuration model of the ion, which was shown to closely match the
    %oscillator strengths: are taken from "superstructure" using a 3
    %filename: ca_15.splups
    

  7. ca_15.psplups (proton collision data)
  8. contains the spline fits to the scaled proton collision strengths.

     
    
    %filename: ca_15.psplups
    %rates: Ryans R.S.I., Foster-Woods V.J, Keenan F.P., Reid R.H.G., 1999, ADNDT 73, 1-42
    %energies: Cheng K.T., Kim Y.K., Desclaux J.P., 1979, ADNDT 24, 111
    %comment: Fits valid for temperatures 7e5 to 6e7 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

    ca_15_table.html (html table)

    Page created by Giulio Del Zanna on Wed Jun 8 16:02:39 2022