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Journal Articles

Estimated isotopic compositions of Yb in enriched $$^{176}$$Yb for producing $$^{177}$$Lu with high radionuclide purity by $$^{176}$$Yb($$d,x$$)$$^{177}$$Lu

Nagai, Yasuki*; Kawabata, Masako*; Hashimoto, Shintaro; Tsukada, Kazuaki; Hashimoto, Kazuyuki*; Motoishi, Shoji*; Saeki, Hideya*; Motomura, Arata*; Minato, Futoshi; Ito, Masatoshi*

Journal of the Physical Society of Japan, 91(4), p.044201_1 - 044201_10, 2022/04

 Times Cited Count:4 Percentile:46.56(Physics, Multidisciplinary)

Recently, $$^{177}$$Lu is considered as one of the most important medical RIs for treating neuroendocrine tumors. A plan to produce $$^{177}$$Lu with high purity by using enriched $$^{176}$$Yb samples with irradiation of deuteron beams in accelerators has been discussed. However, since the other Yb isotopes contained in the Yb sample interacts with deuterons, Lu isotopes other than $$^{177}$$Lu are produced as impurities. Since the purity of $$^{177}$$Lu is important for medical use, a method to evaluate the impurity of Lu has been required. In this study, we proposed a new method to estimate production yields of each Lu isotopes in Yb samples with arbitrary isotopic compositions by using excitation functions of Yb($$d,x$$)Lu reactions and the particle transport calculation code PHITS. The method plays an important role in discussing the isotopic composition of enriched samples to produce high-purity $$^{177}$$Lu using accelerators.

Journal Articles

High thermo-separation efficiency of $$^{99m}$$Tc from molten $$^{100}$$MoO$$_{3}$$ samples by repeated milking tests

Nagai, Yasuki; Kawabata, Masako; Sato, Nozomi; Hashimoto, Kazuyuki; Saeki, Hideya; Motoishi, Shoji*

Journal of the Physical Society of Japan, 83(8), p.083201_1 - 083201_4, 2014/07

 Times Cited Count:11 Percentile:58.29(Physics, Multidisciplinary)

Journal Articles

Production of useful radioisotopes with a high-energy proton accelerator

Sekine, Toshiaki

JAERI-Conf 95-017, 0, p.209 - 214, 1995/09

no abstracts in English

Oral presentation

Production of medical radioisotopes using the experimental fast reactor Joyo

Sasaki, Yuto; Okagaki, Masaki; Maeda, Shigetaka

no journal, , 

The experimental fast reactor Joyo is the only fast neutron spectrum reactor in the OECD member countries. It has been used for demonstration tests of the safety features unique to fast reactors, such as fuel breeding and core cooling by natural circulation of sodium cooling. Currently, work is underway to comply with the new regulatory standards, and it is scheduled to be restarted in JFY2026. After restarting, it is planned to be used for a variety of purposes, such as the development of fast demonstration reactors, irradiation of materials such as fusion materials, and the production of radioactive isotopes for medical use. In particular, the production of medical radioisotopes can be carried out not only using methods that make the most of the fast neutron spectrum unique to fast reactors, such as the (n,2n) reaction necessary for the production of $$^{225}$$Ac, but also by adjusting the neutron spectrum flexibly using various moderators, making it possible to carry out irradiation in a thermal neutron spectrum environment, such as the (n,$$gamma$$) reaction necessary for the production of $$^{99}$$Mo. At this conference, we will report on the technology for producing medical radioisotopes using the experimental fast reactor Joyo.

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