Dzysiuk N. Cross sections of nuclear reactions (n,x) for germanium, terbium and lutetium isotopes in 14 MeV energy range.

Cross sections for reaction 175-Lu(n,a) at first time have been measured with accuraсy less then 15% at neutron energies 13,5, 14,2 and 14,7 МеV. Cross sections for reaction 72-Ge(n,2n) at first time have been measured with accuracy less then 10% at neutron energies 13,4, 13,7, 14,4 and 14,7 МеV. For reaction 159-Tb(n,na) founded that cross section in 5 times less then previous upper estimate. Essentially specified cross section values for reactions 175-Lu(n,p), 70-Ge(n,p), 176-Lu(n,a) and 159-Tb(n,p) at neutron energy around 14 МеV. Demonstrated efficiency and correctness of using of neutron-activation method, modified by computer modelling. This fact confirmed by good agreement between measured cross sections for reactions 74-Ge(n,a), 70-Ge(n,2n) and 159-Tb(n,2n) with existing data. Calculations shown, that reaction 175-Lu(n,a) at neutron energy 14,6 МеV in 50 % occuring by stripping mechanism.