  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.
