  $\underline{\textbf{MO}}$nte-carlo $\underline{\textbf{N}}$ucleon transport
$\underline{\textbf{C}}$ode (MONC) for nucleon transport is extended for below
20MeV proton transport using ENDF and EXFOR data base. It is used to simulate
p+$^7$Li reaction upto 20MeV proton energies and produced neutron spectra are
reported here. The simulated results are compared with calculated values from
other available codes like PINO, EPEN, SimLiT and experimental data. The
spectra reported here can be used to get the neutron cross-section for the
quasi-mono-energetic neutron reaction and will help to subtract the low energy
contribution. The neutron spectra also useful as this reaction is used for
accelerator based Boron Neutron Capture Therapy. The backing materials are used
to fully stop the proton beam hence contribution from the neutrons from backing
materials is estimated. It is found that Tantalum is good backing material
below $\sim$8 MeV and Carbon is better at higher energies.
