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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:
%energy levels (n=2): Fuhr, J.R., et al., "NIST Atomic Spectra Database" Ver. 2.0, March 1999, NIST Physical Reference Data %energy levels (n=3): Kelly,R.L., 1987, J.Phys.Chem.Ref.Data 16, Suppl. 1. %Theoretical energy levels: Zhang,H.L., Graziani,M., Pradhan,A.K., 1994, A&A, 283, 319. %theoretical energy levels: Sampson and Zhang, 1995, unpublished calculations %comment: energy levels renumbered %produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration % % E.Landi and P.R. Young - 8-Dec-2003
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:
%energy levels (n=2): Fuhr, J.R., et al., "NIST Atomic Spectra Database" Ver. 2.0, March 1999, NIST Physical Reference Data %energy levels (n=3): Kelly,R.L., 1987, J.Phys.Chem.Ref.Data 16, Suppl. 1. %Theoretical energy levels: Zhang,H.L., Graziani,M., Pradhan,A.K., 1994, A&A, 283, 319. %theoretical energy levels: Sampson and Zhang, 1995, unpublished calculations %A-values ground forbidden transition: Flower, D.R., Nussbaumer, H., 1975, A&A, 45, 145 %A-values allowed transitions 2s2.2p-2s.2p2, 2s2.2p-2s2.3s and 2s2.2p-2s2.3d: Correge,G., Hibbert,A., 2002, J.Phys.B, 35, 1211 %A-values allowed transitions 2s.2p2-2p3, 2s.2p2-3s2.3p, 2s2.3s-2s2.3p, 2s2.3p-3s2.3d, 2p3-3s2.3d, 2s.2p2-2s.2p.3s (4P levels in 3s, only): Tachiev, G., & Froese Fischer, C., 2000, J.Phys.B, 33, 2419 %A-values all other allowed transitions: Unpublished data of H.L. Zhang & D.H. Sampson, 1995 %comment: gf and A values for transitions 123-71 and 124-72 are estimates %comment: The following table lists all those transitions for which the A-values are more than 30% different from the previous CHIANTI file (pre-v5): i j wvl A_1 A_2 %diff 1 16 279.631 1.91e+009 2.67e+009 39.44 1 31 238.360 2.17e+010 2.91e+010 33.78 2 16 279.934 3.85e+009 5.35e+009 38.81 2 31 238.580 4.35e+009 5.81e+009 33.58 2 50 238.570 2.56e+010 3.49e+010 35.97 13 50 608.290 2.61e+003 5.80e+00522146.07 12 31 608.459 5.02e+003 5.65e+00511163.96 3 74 272.177 1.01e+009 1.70e+009 67.82 8 73 442.880 1.72e+006 9.31e+007 5315.94 9 73 476.918 5.79e+006 2.92e+006 -49.56 3 88 272.077 2.52e+009 4.25e+009 68.43 8 87 442.710 1.76e+006 9.38e+007 5238.65 9 87 476.720 1.39e+006 4.68e+005 -66.35 4 74 272.274 5.06e+009 8.47e+009 67.43 6 73 379.924 7.63e+007 4.93e+008 546.18 10 73 477.466 2.83e+006 1.14e+006 -59.58 4 88 272.174 8.08e+008 1.36e+009 68.07 6 87 379.798 7.41e+006 4.92e+007 564.19 6 88 320.479 4.83e+004 7.41e+004 53.66 10 87 477.269 7.02e+006 3.21e+006 -54.23 4106 271.991 1.81e+009 3.07e+009 69.11 5 87 313.979 6.57e+002 9.92e+003 1408.60 5 88 272.310 2.74e+009 4.58e+009 67.30 7 87 379.778 6.75e+007 4.44e+008 556.84 5106 272.127 4.25e+009 7.15e+009 68.35 7106 320.211 2.71e+004 8.98e+004 230.81 %produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration % % P.R. Young and E. Landi - 12-Dec-2003
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: o_4.splups %oscillator strengths: Dankwort, W., Trefftz, E., 1978, A&A, 65, 93 %oscillator strengths: Bhatia, A.K., Feldman, U., Seely, J.F., 1986, ADNDT, 35, 319 %oscillator strengths: Flower, D.R., Nussbaumer, H., 1975, A&A, 45, 145 %effective collision strengths (levels 1 - 15): Zhang, H.L., Graziani, M., Pradhan, A.K., 1994, A&A, 283, 319 %collision strengths (levels 16 and above): Sampson and Zhang, 1995, unpublished calculations %comment: effective collision strengths are provided in the temperature range 3.0 < Log T < 5.65 % produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration % % K.P. Dere 1997
contains the spline fits to the scaled proton collision strengths.
References:
%filename: o_4.psplups %rates: Foster VJ, Keenan FP, Reid RHG, ADNDT 67, 99, 1997 %energies: From .elvlc file, experimental energies %comment: The rate coefficients are in units cm^3/s. %comment: Fits valid for temperatures 2e4 to 3e5 K. %produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration % % Peter Young 15-May-2001