  We have recorded spectra of iron-neon and iron-argon hollow cathode lamps in
the region 1700A -- 5um (59000 -- 2000cm-1), with Fourier transform (FT)
spectrometers at the National Solar Observatory, Tucson, Arizona, U.S.A. and
Imperial College, London, U.K., and with a high resolution grating spectrograph
at the National Institute of Standards and Technology, Gaithersburg, U.S.A. The
uncertainty of the strongest lines in the FT spectra is <0.002cm-1 (0.2mA at
3000A; 8mA at 2um). Pressure and current-dependent shifts are <0.001cm-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 infra-red, and many of the new
lines are present in the solar spectrum. Experimental log(gf) values are
included where available. A further 125 unidentified lines due to Fe I are
given.
