Ni XXI - VERSION 11.0

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

ni_21.elvlc (energy levels)

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

 
%filename: ni_21.elvlc
%observed energy levels (n=2,3 levels): Shirai,J., Musgrove,A., Wiese,W.L.,2000, J.Phys.Chem.Ref.Data, Monograph 8
%theoretical energy levels (n=2,3 levels): Bhatia, A.K., Landi, E., unpublished SUPERSTRUCTURE calculation
%Comment: The SUPERSTRUCTURE calculation included 24 configurations:
                  2s2.2p4, 2s.2p5, 2p6
                  2s2.2p3.3l, 2s.2p4.3l, 2p5.3l     (l=s,p,d)
                  2s2.2p3.4l, 2s.2p4.4l, 2p5.4l     (l=s,p,d,f)
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
% 
% E. Landi - May 2003

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: ni_21.wgfa
%observed energy levels (n=2,3 levels): Shirai,J., Musgrove,A., Wiese,W.L.,2000, J.Phys.Chem.Ref.Data, Monograph 8
%theoretical energy levels (n=2,3 levels): Bhatia, A.K., Landi, E., unpublished SUPERSTRUCTURE calculation
%A values and oscillator strengths: Bhatia, A.K., Landi, E., unpublished SUPERSTRUCTURE calculation
%Comment: The SUPERSTRUCTURE calculation included 24 configurations:
2s2.2p4, 2s.2p5, 2p6
2s2.2p3.3l, 2s.2p4.3l, 2p5.3l     (l=s,p,d)
2s2.2p3.4l, 2s.2p4.4l, 2p5.4l     (l=s,p,d,f)
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
% E. Landi - May 2003

 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

ni_21.scups (electron collision data)

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

 
% E. Landi 2001                                                                        
%                                                                                      
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%Collision strengths: Bhatia, A.K., Landi, E., Mason, H.E. 2003, ADNDT, 83, 71         
%Oscillator strengths: Bhatia, A.K., Landi, E., Mason, H.E. 2003, ADNDT, 83, 71        
%filename: ni_21.splups

ni_21.psplups (proton collision data)

contains the spline fits to the scaled proton collision strengths.

 

%filename: ni_21.psplups
%rates: Feldman, U., Doschek, G.A., Cheng, C.C., Bhatia, A.K., 1980, J. Applied Phys., 51, 190
%energies: Observed energies from CHIANTI .elvlc file
%comment: Fitted using single_temp.pro with scalx=0.90
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%  
% Peter Young  12-Mar-02

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

ni_21_table.html (html table)