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The CHIANTI database consists of the following primary ASCII files for this ion:
contains the energy levels in cm^(-1) It includes both experimental and theoretical values of the levels energies.
%energy levels: Fuhr, J.R., Kelleher, D.E., Martin, W.C., Musgrove, A., Sugar, J., Wiese, W.L.,
Dalton, G.R., Dragoset, R.A., Mohr, P.J., Olsen, K., Reader, J., Saloman, E.B., Sansonetti, C.J.,
Wiersma, G., "NIST Atomic Spectra Database" Ver. 2.0, March 1999, NIST Physical Reference Data.
%Theoretical energy levels: Hibbert, A., Biemont, E., Godefroid, M., Vaeck, N., 1991, A&ASS, 88, 505
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
% E.Landi - Jul 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.
%observed energy levels: Fuhr, J.R., et al., "NIST Atomic Spectra Database" Ver. 2.0, March 1999, NIST Physical Reference Data. %Theoretical energy levels: Hibbert, A., Biemont, E., Godefroid, M., Vaeck, N., 1991, A&ASS, 88, 505 %Radiative data for transitions within the ground configurations: Fuhr, J.R., et al., "NIST Atomic Spectra Database" Ver. 2.0, March 1999, NIST Physical Reference Data. %Radiative data all other transitions: Hibbert, A., Biemont, E., Godefroid, M., Vaeck, N., 1991, A&AS, 88, 505 %produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration % % Enrico Landi Jul 2001
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: n_1.splups
%oscillator strengths: Hibbert, A., Biemont, E., Godefroid, M., Vaeck, N., 1991, A&AS, 88, 505
%effective collision strengths: Tayal, S.S., 2000, ADNDT, 76, 191
%Comment: the effective collision strengths of transitions 1-23 and 1-24 were found be to incorrect
% (Tayal S.S., 2001, private communications) and more accurate values have been kindly provided
% by the author, and they replace the published values.
%Comment: the effective collision strengths were provided in the temperature range 3.0 < Log T < 5.75
%comment: added collision data for transitions involving level 5. The changes in level populations
should be minimal for electron densities lower than 10^12 cm^3 (Jun 2003).
% produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration
%
%Enrico Landi - Jun 2003