The neutron detecor MONA (MOdular Neutron Array) was used to measure n
eutron spectra originated in the C-12+Y-89 system. The neutron spectra
were measured at six selected angles by TOF method at average laborat
ory energy of 49.5 MeV. The temperature of the source was determined t
hrough off-line analysis and was found to be 1.62 MeV. The level densi
ty parameter a, was determined within the framework of a Fermi-gas mod
el, to be equal to a = A/9.4.