Production possibility of 161Tb utilizing secondary neutrons generated by protons from a low-energy cyclotron onto an isotope production target


The production possibility of the medically relevant radioisotope 161Tb using a 9Be + p (Ep = 18 MeV) neutron source was investigated at the MGC cyclotron of ATOMKI. The 161Tb is formed via the 160Gd(n,γ)161Gd → 161Tb nuclear process. The available EOB yield was about 8000 Bq C−1 g−1. Predictions based on Monte Carlo calculations in conjunction with TENDL-2017 cross-section data overestimate the experimental results. These preliminary results indicate that secondary neutrons generated in a high-intensity medical radioisotope production target station could be useful for research-scale 161Tb production.

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The Hungarian authors wish to thank the financial support by the Hungarian Research Foundation, (Budapest, NKFIH/OTKA K108669). In part, this work was supported by the VKSZ_14-1-2015-0021 project financed from the National Research Development and Innovation Fund of Hungary in the framework of the Széchenyi 2020 Program.

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Correspondence to Ferenc Szelecsényi.

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Szelecsényi, F., Fenyvesi, A., Steyn, G.F. et al. Production possibility of 161Tb utilizing secondary neutrons generated by protons from a low-energy cyclotron onto an isotope production target. J Radioanal Nucl Chem 318, 491–496 (2018).

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  • natGd target
  • Neutron reactions
  • Monte Carlo calculation
  • TENDL 2017 library
  • 161Tb and 159Gd formation