ИСТИНА

In order to investigate molybdenum’s photodisintegration, experiments were conducted by gamma activation methods[1], using RTM-70 accelerator. Natural mixture of molybdenum isotopes was irradiated by bremsstrahlung photons under maximum energy of electrons 19.5, 29.1 and 67.7 MeV. As a result of these photonuclear reactions, accompanying ejection of maximum 4 neutrons, Mo, Nb isotopes were created. Their relative yields, that were normalized by yield of reaction 100Mo(γ,n)99Mo, were calculated and compared with the theoretical calculation. This theoretical calculation is based on “Combined model of photonuclear reaction”[2], which was developed in Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University. The comparison shows that the theoretical model well describes the experimental results of photonuclear reactions for all molybdenum isotopes. As the mass number of molybdenum isotopes decreases, proton ejection threshold steeply decreases, accordingly the yield of photoproton reaction hardly increases and that of photoneutron reaction hardly decreases. This can be interpreted on the basis of shell structure of molybdenum. 1. Belyshev S. S., Ermakov A. N., Ishkhanov B. S. et al. // Nucl.Instrum. and Meth. in Phys. Res. Sect. A 745,133-137(2014) 2. Ishkhanov B.S., Orlin V.N. // Phys. Atom. Nucl. 74, 19 (2011)