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: http://www.arcetri.astro.it/science/chianti/chianti_5.1/database/he/he_2.html
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The CHIANTI database consists of 4 primary ASCII files for each ion in the database.
contains the energy levels in cm^(-1) It includes both experimental data and theoretical values of the levels energies.
References:
%observed energy levels: Kelly, R.L., 1987, J.Phys.Chem.Ref.Data 16, Suppl. 1
%theoretical energy levels: Connor Ballance (private communications)
%comment: An R-matrix with pseudostates He^+ calculation 1s-5g
Degenerate transitions removed within LS coupling scheme
contains wavelengths, gf and A values for each transition. Wavelengths are based on experimental level energies where available; wavelengths calculated from theoretical energies are less accurate and are given as negative values.
References:
%observed energy levels: Kelly, R.L., 1987, J.Phys.Chem.Ref.Data 16, Suppl. 1. % A values: Parpia, F.A., Johnson, W.R., 1972, Phys.Rev.A, 26, 1142. %oscillator strengths: Wiese, W.L., Smith, M.W., Glennon, B.M., 1966, Atomic Transition Probabilities, NSRDS-NBS-4. %note: Wiese's oscillator strengths are hydrogenic %produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration % % K.P.Dere 1995
contains the spline fits to the electron collision strengths scaled according to Burgess and Tully (1992). Accurate replication of the temperature averaged collision strength over a wide range of temperatures can be accomplished with the data in this file.
References:
%filename: he_2.splups
%theoretical energy levels: Connor Ballance (private communications)
%oscillator strengths: Wiese, W. L., Smith, M. W., and Glennon, B. M., 1966, Atomic Transition Probabilities, NSRDS-NBS-4.
%comment: hydrogenic f values
%collision strengths: Connor Ballance (private communications)
%comment: An R-matrix with pseudostates He^+ calculation 1s-5g
Degenerate transitions removed within LS coupling scheme
L=0-11 exchange calculation
L=12-60 non-exchange calculation + top up
(Connor Ballance - 28th June 2003)
Degenerate transitions removed within LS coupling scheme
1 9 3.556 1.160e+04 2.320e+04 5.800e+04 8.120e+04 1.160e+05 2.320e+05 3.480e+05 5.800e+05 1.000e+06
1 9-2.034e-02 2.466e-02 2.334e-02 2.058e-02 1.962e-02 1.878e-02 1.764e-02 1.728e-02 1.716e-02 1.734e-02
1 10 3.750 1.160e+04 2.320e+04 5.800e+04 8.120e+04 1.160e+05 2.320e+05 3.480e+05 5.800e+05 1.000e+06
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data collaboration
%
% K.P.Dere - Jul 2, 2003