CHIANTI

An Atomic Database for Spectroscopic Diagnostics of Astrophysical Plasmas.

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Naval Research Laboratory (USA) - Rutherford Appleton Laboratory (UK)
University of Cambridge (UK) - George Mason University (USA) - Universita' degli Studi di Firenze (Italy)

He I - VERSION 5.1

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

  1. he_1.elvlc (energy levels)

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

     
%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

  2. he_1.wgfa (radiative data)

    3. 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. 

     
%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

  3. he_1.splups (electron collision data)

    4. contains the spline fits to the electron collision strengths scaled according the rules formulated by 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. 

     

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

  4. he_1.splups (proton collisional data) Not available in this VERSION.

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

    he_1_table.html (html table)


    Last revised by G. Del Zanna on 4-Sep-2009