  We present results from Inverse photoemission spectroscopy in the isochromat
mode, with angular resolution, from the clean Au(113) surface. To identify the
origin of the different resonances we have performed first principles
calculations of the bulk band structure in the LMTO formalism. Using the
particular characteristic of the spectrometer we have made a theoretical
prediction of the bulk features dispersion as a function of parallel momentum,
considering only energy and momentum conservation. Thus we have been able to
unambiguously identify, from measured spectra various bulk derived resonances
in addition to two surface resonances and a surface state in the [-110] and
[33-2] directions respectively.
