  Fast neutron beams are of relevance for many scientific and industrial
applications. This paper explores fast neutron production using a TANDEM
accelerator at the Legnaro National Laboratories, via an energetic ion beam (90
MeV $^{14}N$) onto a lithium target. The high energy models for nuclear
collision of FLUKA foresee large neutron yields for reactions of this kind. The
experiment aimed at validating the expected neutron yields from FLUKA
simulations, using two separate and independent set-ups: one based on the
multi-foil activation technique, and the other on the time of flight technique,
by using liquid scintillator detectors.
  The results of the experiment show clear agreement of the measured spectra
with the FLUKA simulations, both in the shape and the magnitude of the neutron
flux at the measured positions. The neutron spectrum is centered around the 8
MeV range with mild tails, and a maximum neutron energy spanning up to 50 MeV.
  These advantageous results provide a starting point in the development of
fast neutron beams based on high energy ion beams from medium-sized accelerator
facilities.
