THE ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 94:221-459, 1994 September

                        A NEW MULTIPLET TABLE FOR Fe I

                           G. NAVE AND S. JOHANSSON
           Department of Physics, Univerity of Lund, Solvegatan 14,
                             S-223 62 Lund, Sweden

                       R. C. M. LEARNER AND A. P. THORNE
          Blackett Laboratory, Imperial College, Prince Consort Road,
                              London, SW7 2BZ UK

                                    AND

                                J.W. BRAULT
               National Solar Observatory, Tucson, AZ 85726-6732

                                 ABSTRACT
 
        We have recorded spectra of iron-neon and iron-argon hollow cathode
     lamps in the region 1700 A--5 micron (59,000-2000 cm^-1), with Fourier
     transform (FT) spectrometers at the National Solar Observatory,
     Tucson, Arizona, and Imperial College, London, UK, and with a
     high-resolution grating spectrograph at the National Institute of
     Standards and Technology, Gaithersburg, Maryland.  The uncertainty of
     the strongest lines in the FT spectra is less than 0.002 cm^-1 (0.2 mA
     at 3000 A; 8 mA at 2 micron).  Pressure- and current-dependent shifts
     are less than 0.001 cm^-1 for transitions between low-lying levels,
     increasing to 0.006 cm^-1 for transitions between the most highly
     excited levels.  We report 28 new energy levels of Fe I and revised
     values of another 818 levels.  We have identified 9501 lines as due to
     9759 transitions in Fe I, and these are presented in the form of a new
     multiplet table and finding list.  This compares with the ~5500 lines
     due to 467 energy levels in the multiplet tables of Moore (1950,
     1959).  The biggest increase is in the near-ultraviolet and near
     infrared, and many of the new lines are present in the solar spectrum.
     Experimental log (gf) values are included where they are available.  A
     further 125 unidentified lines due to Fe I are given.  The tables are
     also available in conputer-readable form.

     Subject headings:  atomic data -- line: identification