Cr XVIII - VERSION 11.0

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

cr_18.elvlc (energy levels)

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

 
%filename: cr_18.elvlc
%Observed energy levels: Edlen, 1984, Phys.Scripta, 30, 135 
%Theoretical energy levels (1-15): Zhang, Sampson, ADNDT, 1999, 72, 153
% produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
% 
% G. Del Zanna, May 2001.

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.

 
%filename: cr_18.wgfa
% Experimental energy levels (1 - 15): Edlen, 1984, Phys.Scripta, 30, 135
% A values for transitions within the ground configuration: Merkelis et al., 1999, Physica Scripta 59, 122
% gf values for transitions between the (1 - 15) levels: Zhang, Sampson, ADNDT, 1999, 72, 153
% A values for transitions with 2s.2p4 and 2p5: Zhang, Sampson, ADNDT, 1999, 72, 153
% A values for forbidden ransitions with 2s.2p4 and 2p5: Merkelis et al., 1999, Physica Scripta 59, 122
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
% G. Del Zanna, May 2001

 K. Dere  --  minimum branching ratio =   1.00e-05  :  2017 December 06
%File processed with wgfa_tidy by pryoung on  6-Mar-2019
%File processed with wgfa_tidy by pryoung on 31-May-2023

cr_18.scups (electron collision data)

contains the effective electron collision strengths scaled according to the rules formulated by Burgess and Tully (1992).

 
% G. Del Zanna, May 2001                                                                
%                                                                                       
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration 
%collision strengths: Zhang, Sampson, 1999, ADNDT, 72, 153                              
%oscillator strengths: Zhang, Sampson, 1999, ADNDT, 72, 153                             
%filename: cr_18.splups

cr_18.psplups (proton collision data)

contains the spline fits to the scaled proton collision strengths.

 

%filename: cr_18.psplups
%rates: Feldman, U., Doschek, G.A., Cheng, C.C., Bhatia, A.K., 1980, J. Appl. Phys. 51, 190
%energies: Observed energies from the CHIANTI .elvlc file.
%comment: Fitted using single_temp.pro with scalx=0.90.
%comment: The authors did not give theoretical energies.
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
% Peter Young  17-May-01

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

cr_18_table.html (html table)