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Abstract: Due to its physical and chemical characteristics, 177Lu is a very attractive radionuclide for use in nuclear medicine. This paper introduces a method for a precise calculation of the irradiation yield of 177Lu produced by neutron activation of 176Lu in a nuclear reactor. The calculation is based on the Westcott convention which requires the knowledge of the neutron flux parameters. In this work, the neutron flux parameters of the new research reactor FRM-II (Garching, Germany) were determined and the stability of thermal neutron flux and thermal neutron flux temperature was monitored. The comparison of theoretically calculated and experimentally determined yield for reaction is presented. [Copyright &y& Elsevier]

Abstract: Determination of k 0-factors for zirconium isotopes was performed by co-irradiation of Zr and Au–Al. Due to the highly thermalized irradiation position at FRM-II, interferences from epithermal neutrons were found largely decreased for 96Zr (n, γ) 97Zr–97mNb, the reaction with the highest Q 0-value in all (n, γ) reactions. Results showed that, the 95Zr k 0-values from this work were the same as the recommended ones. For 97Zr–97mNb 743.4keV gamma-line, the new k 0-value was 2.8% higher compared to the recommended value, which is not a significant difference. These results are helpful in clarifying the suspicion about the Zr k 0-factors. [Copyright &y& Elsevier]

Abstract: Nuclear transformation of the target material is considered as an essential parameter for the specific activity of 177Lu produced via 176Lu(n, γ)177Lu nuclear reactions. It is shown that 176Lu burn-up has to be taken into account to estimate the 177Lu specific activity related to the total mass or amount of lutetium in the system. [Copyright &y& Elsevier]