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Radioanalytical prediction of radiative capture in 99Mo production via transmutation adiabatic resonance crossing by cyclotron

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Abstract

In this study, the transmutation adiabatic resonance crossing (TARC) concept was estimated in 99Mo radioisotope production via radiative capture reaction in two designs. The TARC method was composed of moderating neutrons in lead or a composition of lead and water. Additionally, the target was surrounded by a moderator assembly and a graphite reflector district. Produced neutrons were investigated by (p,xn) interactions with 30 MeV and 300 μA proton beam on tungsten, beryllium, and tantalum targets. The 99Mo production yield was related to the moderator property, cross section, and sample positioning inside the distinct region of neutron storage as must be proper to achieve gains. Gathered thermal flux of neutrons can contribute to molybdenum isotope production. Moreover, the sample positioning to gain higher production yield was dependent on a greater flux in the length of thermal neutrons and region materials inside the moderator or reflector. When the sample radial distance from Be was 38 cm inside the graphite region using a lead moderator design, the production yield had the greatest value of activity, compared with the other regions, equal to 608.72 MBq/g. Comparison of the two designs using a Be target revealed that the maximum yield occurred inside the graphite region for the first design at 38 cm and inside the lead region for the second design at 10 cm. The results and modeling of the new neutron activator were very encouraging and seem to confirm that the TARC concept can be used for 99Mo production in nuclear medicine.

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Acknowledgments

This research was supported by Dirección de Investigación, Universidad de Talca, project VAC 600 556.

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Correspondence to Abdollah Khorshidi or Mahdi Sadeghi.

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Khorshidi, A., Sadeghi, M., Pazirandeh, A. et al. Radioanalytical prediction of radiative capture in 99Mo production via transmutation adiabatic resonance crossing by cyclotron. J Radioanal Nucl Chem 299, 303–310 (2014). https://doi.org/10.1007/s10967-013-2749-7

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  • DOI: https://doi.org/10.1007/s10967-013-2749-7

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