References for Fe XIII

.elvlc file (energy levels)

% Filename: fe_13.elvl
%produced as part of the Arcetri/Cambridge/NRL atomic data collaboration
%energy levels(1-3): Penn & Kuhn, Ap.J.Lett, 1995, in press
%energy levels(6,9- 11,13,15,16,22): Jupen et al., MNRAS, 264, 627, 1993
%energy levels(4-5,7-8,12,14,17-21,23-27): NIST Database for Atomic
   Spectroscopy, Version 1.0, NIST Standard Reference Database 61, 1995.
%Theoretical energy levels: Gupta, G.P., Tayal, S.S., 1998, ApJ, 506, 464
%Theoretical energy for level 6: Fawcett & Mason, 1989, ADNDT, 43, 245

.splups file (collision data)

% effective collision strengths: Gupta, G.P., Tayal, S.S., 1998, ApJ, 506, 464
%produced as part of the Arcetri/Cambridge/NRL atomic data base collaboration 'CHIANTI'
%
% E. Landi Apr. 1999

.wgfa file (radiative data)

% A values: computed from 'superstructure' using a 24
    configuration model of Fe XIII.
% comment: the model of Fe XIII included the following configurations:
    3s2 {3p2 3p3d 3d2}
    3s23p {4s 4p 4d 4f}
    3s3p2 {3d 4s 4p 4d 4f}
    3p3 {3d 4s 4p 4d}
    3s3d {4s 4p 4d 4f}
    3p4
    3s {3p3 3d3 3p3d2}
% note: that level 18 is metastable, and can decay down to levels
    in the 3s3p^3 and 3s^23p3d configurations via electric quadrupole
    and magnetic dipole transitions. However, the strongest
    transitions are down to the ground configuration via two magnetic
    QUADRUPOLE transitions. These transitions are accurately known
    since the line strength hardly changes when extra configurations
    are added to the model.