Isotope production for medical usage using fast neutron reactions

高速中性子を用いた医療用同位体製造

初川 雄一; 永井 泰樹; 金 政浩; 瀬川 麻里子   ; 原田 秀郎   ; 岩本 修  ; 岩本 信之  ; 落合 謙太郎; 高倉 耕祐; 今野 力  ; 橋本 雅史

Hatsukawa, Yuichi; Nagai, Yasuki; Kin, Tadahiro; Segawa, Mariko; Harada, Hideo; Iwamoto, Osamu; Iwamoto, Nobuyuki; Ochiai, Kentaro; Takakura, Kosuke; Konno, Chikara; Hashimoto, Masashi

核医学において最もよく用いられているTcの供給は危機に面しており、新たな製造プロセスの開発は喫緊の問題である。本研究はTcをFNSより発生される14MeV高速中性子を用いて効率よく製造することを提案するものであり、試験的に作成したチタン酸ゲルを用いたTc/Moジェネレータについても併せて発表を行う。

Authors proposed a new route to produce Mo by the Mo(,2)Mo reaction, which has some characteristic features. Such as the reaction cross section is large, about 1.5 barn at 12 17 MeV, which is 10 times larger than the thermal-neutron capture cross section of Mo. Second, the cross sections of the (,), (,), and (,) reactions are less than a few mb at = 14 MeV. Third, a large amount of Mo target materials can be used, compared to that for proton beam irradiation on Mo. Fourth, intense neutrons with energy of 12-17 MeV are already available. In the present work we have measured all -rays emitted from activities produced by bombarding a natural Mo target with neutrons from the D(H,)He reaction at Fusion Neutronics Source Facility (FNS) at Japan Atomic Energy Agency (JAEA) to study characteristic features mentioned above more in detail. The neutron flux was about 10n/cms. The experimental results at FNS will be discussed in the conference.