This study describes the design of a neutron activator that contains a beryllium target, a lead/bismuth moderator, graphite/PbF₂ reflectors, and a boron absorber. Production of ⁹⁹ Mo isotope using millimeter-sized ⁹⁸ Mo samples located in various regions of the activator under study was also simulated using the MCNPX-code. If the ⁹⁸Mo samples are placed in the reflector region, the yield increases due to a larger flux of epithermal neutrons.

Keywords: neutron activator, neutron moderator materials, adiabatic resonance crossing, radioisotope production, molybdenum transmutation, nuclear medicine, Monte Carlo method PACS: 28.60.+s, 29.25.−t, 87.57.U− (all) DOI: 10.3367/UFNe.2018.09.038441 URL: https://ufn.ru/en/articles/2019/9/f/ 000504893200006 2-s2.0-85084921695 2019PhyU...62..931K Citation: Khorshidi A "Molybdenum-99 production via lead and bismuth moderators and milli-structure-98Mo samples by indirect production technique using Monte Carlo method" Phys. Usp. 62 931–940 (2019) BibTexBibNote ® (generic)BibNote ® (RIS)MedlineRefWorks Received: 26th, April 2018, revised: 3rd, September 2018, accepted: 13th, September 2018 Оригинал: Хоршиди А «Производство молибена-99 с использованием замедлителей из свинца и висмута и миллиметровых структур 98Mo: технология непрямого получения образцов и моделирование по методу Монте-Карло» УФН 189 997–1007 (2019); DOI: 10.3367/UFNr.2018.09.038441