  The organic liquid scintillator used in the LVD experiment (INFN Gran Sasso
National Laboratory) has been exposed to an Am-Be neutron source to measure the
light response function for neutron energies in the region from about 4 to 11
MeV. A full Monte Carlo simulation, incorporating the detector response, is
used to generate neutron scattering spectra which are matched to the observed
ones to determine the quenching factors. The obtained light output response is
well described by the semi-empirical Birks model. The results, consistent with
those obtained by other authors using similar hydrocarbonate scintillators, can
be of interest for fast and high-energy neutron spectroscopy that could be
performed with this detector.
