Isotope production for medical usage using fast neutron reactions

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

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.