从不同角度在钍靶上制备用于放射性同位素动力系统和核电池的Ac-227、Ra-228、Th-228和U-232的新方法
A new method in the production of Ac-227, Ra-228, Th-228 and U-232 on Thorium target from different perspective for use in Radioisotope Power Systems and Nuclear Batteries
摘要：
本文从不同的角度介绍了一种新的方法来生产Ac-227、Ra-228、Th-228和U-232放射性同位素，这些放射性同位素具有半衰期长、功率密度高和辐射水平低的特点，在同位素动力系统（替代Pu-238）和核电池中具有重要的应用潜力。在该方法中，用粒子加速器在Th-232靶上产生Ac-227、Ra-228、Th-228和U-232放射性同位素，代替核反应堆中的铀、钍、锕系等。为了实现这一目标，为了生产Ac-227，Ra-228，Th-228和U-232放射性同位素，我们计算了截面和积分产率曲线，并模拟了特定条件下每个反应过程的产物的活度和产率，例如在能量范围为E射弹=1000-1 MeV的1 mA粒子束流中照射24 h。所得数据与实验EXFOR数据库和理论TENDL数据库进行了详细的比较。从Ac-227、Ra-228、Th-228和U-232放射性同位素的适宜生产角度出发，分析讨论了各核反应过程的截面、活度和产额结果。
英文摘要：
We recommended a new method from different perspective for the production of Ac-227, Ra-228, Th-228 and U-232 radioisotopes which have an important potential for use in radioisotope power systems (instead of Pu-238) and nuclear batteries, based on long half-life, high power density and low radiation level. In the method, the production of Ac-227, Ra-228, Th-228 and U-232 radioisotopes were performed by particle accelerators on Th-232 targets, instead of uranium, thorium, actinium series etc. in nuclear reactors. For this aim, to produce Ac-227, Ra-228, Th-228 and U-232 radioisotopes, we calculated cross-section and integral yields curves and simulated activities and yields of product for each reaction process under special conditions, such as during irradiation of 24 h in a particle beam current of 1 mA for the energy range of Eprojectile=1000-1 MeV. The obtained data were compared with experimental EXFOR database and theoretical TENDL database in detail. The cross-section, activity and yields results of each nuclear reaction process were analyzed and discussed in terms of the suitable production of Ac-227, Ra-228, Th-228 and U-232 radioisotopes.
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