title: GEANT 4 simulation of (99)Mo photonuclear production in nanoparticles.
abstract: GEANT 4 Monte-Carlo simulation toolkit is used to study the kinematic recoil method of (99)Mo photonuclear production. Simulation for bremsstrahlung photon spectrum with maximum photon energy 30MeV showed that for MoO3 nanoparticle escape fraction decreases from 0.24 to 0.08 when nanoparticle size increases from 20nm to 80nm. For the natural molybdenum and pure (100)Mo we obtained the lower values: from 0.17 to 0.05. The generation of accompanying molybdenum nuclei is significantly lower for pure (100)Mo and is about 3.6 nuclei per single (99)Mo nucleus, while natural molybdenum nanoparticle produce about 48 accompanying nuclei. Also, we have shown that for high-energy photons escape fraction of (99)Mo decreases, while production of unwanted molybdenum isotopes is significantly higher.
authors.affiliation: National Science Center Kharkov Institute of Physics and Technology, 1 Akademicheskaya St., Kharkov 61108, Ukraine.
authors.forename: N P
authors.initials: NP
authors.lastname: Dikiy
authors.affiliation: National Science Center Kharkov Institute of Physics and Technology, 1 Akademicheskaya St., Kharkov 61108, Ukraine.
authors.forename: A N
authors.initials: AN
authors.lastname: Dovbnya
authors.affiliation: National Science Center Kharkov Institute of Physics and Technology, 1 Akademicheskaya St., Kharkov 61108, Ukraine. Electronic address: fdima@kipt.kharkov.ua.
authors.forename: D V
authors.initials: DV
authors.lastname: Fedorchenko
authors.affiliation: National Science Center Kharkov Institute of Physics and Technology, 1 Akademicheskaya St., Kharkov 61108, Ukraine.
authors.forename: M A
authors.initials: MA
authors.lastname: Khazhmuradov
keywords: Electron accelerators; GEANT 4; Medical isotopes; Molybdenum-99; Monte Carlo simulation; Nanoparticles