Simulation of the liquid targets for molybdenum-99 production

The efficiency of $^{99}$Mo nuclei trapping by clinoptilolite particles using Monte Carlo simulation was studied. The simulation showed the carrier particle traps almost all of the incident $^{99}$Mo nuclei for the photon energies 12-18 MeV. The ratio of the $^{99}$Mo nuclei reaching the carrier to the total number of $^{99}$Mo nuclei escaping the nanoparticle is below 1.5% in for the photon energies 12-18 MeV. High specific activity of produced $^{99}$Mo nuclide requires optimization of the clinoptilolite carrier particles concentration in the suspension.