  The neutron energy spectrum for energies between 5 and 15 MeV has been
measured in the INFN Laboratori Nazionali del Gran Sasso in Italy, by using a
$1.5~m^3$ stainless-steel tank filled with 1.2 ton Gd-doped liquid
scintillator. A two-pulse signature, composed of a prompt and a delayed signal,
due to proton recoils and gammas from neutron capture on Gd respectively, has
been used for events selection. The neutron energy spectrum has been obtained
from the detected proton-recoil spectrum, after unfolding the detector
response, which had been simulated with GEANT4. Although this spectrum has been
measured previously, the present work represents an improvement in the energy
resolution with respect to previously published results. The results obtained
with this technique are compared with other measurements existing in
literature.
