Production of 73Se via (p, 3n) and (d, 4n) reactions on arsenic |
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| Institution: | 3. Department of Chemistry, M. V. Lomonosov Moscow State University, 119991 Moscow, Russian Federation;4. National Research Centre ‘Kurchatov Institute’, 123098 Moscow, Russian Federation;1. Graduate School of Biomedical Science and Engineering, Hokkaido University, Sapporo 060-8638, Japan;2. Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan;3. Nishina Center for Accelerator-Based Science, RIKEN, Wako 351-0198, Japan;4. Advanced Clinical Research Center, Fukushima Medical University, Fukushima City 960-1295, Japan;5. Institute for Nuclear Research, Hungarian Academy of Sciences (ATOMKI), 4026 Debrecen, Hungary;1. Graduate School of Biomedical Science and Engineering, Hokkaido University, Sapporo 060-8638, Japan;2. Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan;3. Advanced Clinical Research Center, Fukushima Medical University, Fukushima 960-1295, Japan;4. Nishina Center for Accelerator-Based Science, RIKEN, Wako 351-0198, Japan;5. Institute for Nuclear Research, Hungarian Academy of Sciences (ATOMKI), 4026 Debrecen, Hungary;1. Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan;2. Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan;3. Nishina Center for Accelerator-Based Science, RIKEN, Wako 351-0198, Japan;1. Department of Physics, University of Malaya, 50603 Kuala Lumpur, Malaysia;2. Nishina Center for Accelerator-Based Science, RIKEN, Wako, Saitama 351-0198, Japan;3. Nuclear Data Section, Division of Physical and Chemical Sciences, Department of Nuclear Sciences and Applications, International Atomic Energy Agency, A-1400 Vienna, Austria;4. Department of Physics, Umaru Musa Yar’adua University, Katsina, Nigeria |
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| Abstract: | Excitation functions were measured for 75As(p, xn) 72, 73, 75Se reactions over the energy range of 3–45 MeV and for 75As(d, xn) 72, 73, 75Se reactions from 5 to 56 MeV. Thin targets were prepared by electrolytic deposition of arsenic on Cu-, or Al-backing. The optimum energy ranges for the production of 73Se were found to be Ep = 40 → 30 MeV and Ed = 45 → 33 MeV; theoretical thick target yields of 73Se amount to 38 and 17.6 mCi/μAh, respectively, and the levels of 72, 75Se impurities to <0.2%. An anion-exchange method was developed to separate no-carrier-added radioselenium. Irradiations of As2O3 for 2 h at nominal currents of 2 μA lead to batch yields of 73Se (at EOB) of about 70 mCi in the case of the (p, 3n) reaction and about 35 mCi in the (d, 4n) reaction. |
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