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Дата изменения: Thu Sep 15 16:58:52 2005 Дата индексирования: Sat Dec 22 13:59:13 2007 Кодировка: Поисковые слова: cygnus loop |
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:
%Experimental energy levels: Martin, W.C., Sugar, J., Musgrove, A., Dalton, G.R., 1999, NIST Database for Atomic Spectroscopy, Version 2.0, NIST Standard Reference Database 61 %Experimental energy levels (3p6.4d levels - 51,52): Ekberg, J.O. & Feldman U., 2003, ApJ, 595, 517 %theoretical energy levels: Griffin, D.C., Pindzola, M.S., Badnell, N.R., 2000, A&ASS, 142, 317 %theoretical energy levels n=5,6,7: Czyzak,S.J., Krueger,T.K., 1966, ApJ, 144, 381 %Comment: Shirai,T., Sugar,J., Musgrove,A., Wiese,W.L., 2000, J.Phys.Chem.Ref.Data, Monograph 8 report an inversion of energies between levels 70 and 72 (same J). For consistency with Griffin et al 2000, who adapted their atomic structure calculation to a set of observed energies identical to the NIST one, we use the NIST v.2 level ordering. %produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration % % E.Landi - Nov 2004
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:
%Experimental energy levels: Martin, W.C., Sugar, J., Musgrove, A., Dalton, G.R., 1999, NIST Database for Atomic Spectroscopy, Version 2.0, NIST Standard Reference Database 61. %Experimental energy levels (3p6.4d levels - 51,52): Ekberg, J.O. & Feldman U., 2003, ApJ, 595, 517 %theoretical energy levels: Griffin, D.C., Pindzola, M.S., Badnell, N.R., 2000, A&ASS, 142, 317 %Comment: Shirai,T., Sugar,J., Musgrove,A., Wiese,W.L., 2000, J.Phys.Chem.Ref.Data, Monograph 8 report an inversion of energies between levels 70 and 72 (ssame J). For consistency with Griffin et al 2000, who adapted their atomic structure calculation to a set of observed energies identical to the NIST v.2 one, we use the NIST v.2 level ordering. %Radiative data: Griffin, D.C., Pindzola, M.S., Badnell, N.R., 2000, A&ASS, 142, 317 %Radiative data n=5,6,7: Czyzak,S.J., Krueger,T.K., 1966, ApJ, 144, 381 %Radiative data 1 - 2 transition: Martin, W.C., Sugar, J., Musgrove, A., Dalton, G.R., 1999, NIST Database for Atomic Spectroscopy, Version 2.0, NIST Standard Reference Database 61 %Radiative data for levels with J=9/2, 11/2: calculated using SUPERSTRUCTURE, with the configurations 3s2.3p6.3d, 3s2.3p5.3d2, 3s2.3p5.3d.4s, 3s2.3p6.4s, 3s2.3p6.4p, 3s2.3p6.4d, 3s2.3p6.4f, 3s2.3p4.3d3, 3s2.3p3.3d4 %comment: SUPERSTRUCTURE radiative data have been corrected for the differences between experimental and SUPERSTRUCTURE transition wavelength differences, where experimental values were available. %produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration % % E.Landi - Nov 2004
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: fe_8.splups %Oscillator strengths: Griffin, D.C., Pindzola, M.S., Badnell, N.R., 2000, A&ASS, 142, 317 %Effective collision strengths: Griffin, D.C., Pindzola, M.S., Badnell, N.R., 2000, A&ASS, 142, 317 %collision strengths and gf values n=5,6,7: Czyzak,S.J., Krueger,T.K., 1966, ApJ, 144, 381 %comment: effective collision strengths were provided in the temperature range 4.5 < Log T < 6.5 %comment: added collisional data for transitions involving levels 21,25,28,29,39. They affect level populations at electron densities larger than 10^9 cm^-3 (June 2003). %produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration % % Enrico Landi - June 2003