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 10
n/cm
s. The experimental results at FNS will be discussed in the conference.