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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.
%Observed energy levels: Edlen, 1984, Phys.Scripta, 30, 135 %Theoretical energy levels (1-15): Zhang, Sampson, ADNDT, 1999, 72, 153 %Theoretical energy levels (16-72): Bhatia,A.K., Seely,J.F., Feldman,U., 1989, ADNDT,43, 99. % produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration % % G. Del Zanna, May 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.
%Experimental energy levels (1 - 15): Edlen, 1984, Phys.Scripta, 30, 135 %Theoretical energy levels (16 - 72): Bhatia, A.K., Seely, J.F., Feldman, U., 1989, ADNDT 43, 99 %A values for transitions indicated within the ground configuration: Merkelis et al., 1999, Physica Scripta 59, 122 %A values for allowed n=2 transitions: Zhang, Sampson, ADNDT, 1999, 72, 153 %A values for non-allowed n=2 transitions: Merkelis et al., 1999, Physica Scripta 59, 122 %A and gf values for transitions from n=3 levels (16-72): Bhatia, A.K., Seely, J.F., Feldman, U., 1989, ADNDT 43, 99 %gf values for transitions between the (1 - 15) levels: Zhang, Sampson, ADNDT, 1999, 72, 153 %produced as part of the Arcetri/Cambridge/NRL atomic data base collaboration % % G. Del Zanna, May 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: zn_24.splups %oscillator strengths (levels 1 - 15): Zhang, Sampson, 1999, ADNDT, 72, 153 %oscillator strengths (levels 16 - 72 only from the ground): Bhatia,A.K., Seely,J.F., Feldman,U., 1989, ADNDT, 43, 99 % collision strengths (levels 1 - 15): Zhang, Sampson, 1999, ADNDT, 72, 153 % Collision strengths (levels 16 - 72 only from the ground): Bhatia,A.K., Seely,J.F., Feldman,U., 1989, ADNDT, 43, 99 %Comment: the original collision strengths from Bhatia et al 1989 were calculated only at one single energy %produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration % % G. Del Zanna, May 2001.