He I - VERSION 11.0.1

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

he_1.elvlc (energy levels)

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

 
%filename: he_1.elvlc
%energy levels: Fuhr et al., 1999, NIST Atomic Spectra Database Version 2.0
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
%  Ken Dere - Feb  2 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: he_1.wgfa
%observed energy levels: Fuhr et al., 1999, NIST Atomic Spectra Database Version 2.0 
%A values: Fuhr et al., 1999, NIST Atomic Spectra Database Version 2.0
%A values (1-2,4,5; 2-4,5,6): Lin, C.D., Johnson, W.R., Dalgarno, A., Phys Rev A, 1977, 15, 154
%A values (1-3 2-phot): Drake, G.W.F., Phys Rev A, 1986, 34, 2871
%oscillator strengths (from 5g 3G and 1G decays): Wiese,W.L., Smith,M.W., Glennon,B.M., 1966, 
     Atomic Transition Probabilities, NSRDS-NBS-4.
%comment: Wiese's f values are hydrogenic
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
%  K.P.Dere and E.Landi - Oct 2004
%File processed with wgfa_tidy by pryoung on  6-Mar-2019
%File processed with wgfa_tidy by pryoung on 31-May-2023

he_1.scups (electron collision data)

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

 
%  Ken Dere - Jun 19 2001                                                                            
%                                                                                                    
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration              
%comment: effective collision strengths were used in the temperature range 3.0 < Log T < 5.75        
%effective collision strengths: Bray, I., Burgess, A., Fursa, D.V., Tully, J.A., 2000, A&AS, 146, 481
%effective collision strengths: Sawey, P.M.J., Berrington, K.A., 1993, ADNDT, 55, 81                 
%oscillator strengths: Fuhr et al., 1999, NIST Atomic Spectra Database Version 2.0                   
%filename: he_1.splups

(proton collisional data) Not available in this VERSION.

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

he_1_table.html (html table)