WEP010 　電子加速器　 8月8日 大展示ホール 13:10 - 15:10

Design of a W-Mo target assembly for production of Mo-99/Tc-99m using an electron linac

○Jaewoong Jang, Mitsuru Uesaka (Univ. of Tokyo)

The Mo-100 photoneutron reaction, where the high-energy photons are generated by an electron linear accelerator (linac), is a promising alternative to the U-235 fission reaction for obtaining Mo-99/Tc-99m, the most commonly used radionuclide pair in nuclear medicine. The yield of such photonuclear-produced Mo-99 depends largely on the energy and current of electron beams, both of which are often constrained by nontechnical aspects such as the availability of a budget and a building site. The dimensions of W and Mo targets, on the other hand, are controllable factors that can lead to increased Mo-99 productivity. For obtaining optimal targetry dimensions, therefore, we wrote a Perl program that runs, in an automated fashion, a series of Monte Carlo simulations with different geometries and tallies, and generates animated visual results. Here we present a W-Mo target assembly optimized for the Mo-99 yield based on interpretations of the simulation results.