Speaker
Description
Abstract The medical radioisotopes such as $^{89} Zr $, $^{68} Ge$, $^{82} Sr$, $^{64} Cu$, $^{225} Ac$, and $^{211} At$ have been attracting a lot of attention in nuclear medicine. In this paper, the isotope development activities of $^{225} Ac$ produced by 100 MeV cyclotron CYCIAE-100 was described briefly. The reaction is $^{232} Th$ (p,x)$^{225} Ac$, for which the proton beam energy of at least 40MeV is required. According to IAEA data, the proton energy decreases from 100MeV to 55MeV, and the nuclear reaction cross section decreases by about half. The power deposition follows a nonlinear distribution along the path and forms a Bragg peak at the end. So, it was numerical studied by M-C code and FEM code simulation to optimize the tilt angle between the target and proton beam, the thickness of the target layer (Th layer), the thickness of the target support layer (Cu), and the water cooling structure of the target support, so as to fully utilize the energy region with high nuclear reaction cross-section to increase yield, and concentrate the energy loss in cooling water to reduce heat transfer loop. Based on this design method, a high-power isotope production target for 100MeV/200 $\mu$ A proton beam was successfully designed. This high convective heat transfer efficiency and high-power isotope production target design has been applied not only to the production of $^{225}Ac$, but also to the solid targets for such as $^{82}Sr$.
| Email address | ljy1358@126.com |
|---|---|
| Funding Agency | This work was supported in part by theNSFC under Grant 12427810 and 12135020 |
| Classification | Isotope production, target, and ion source techniques |
