Journal
RADIOCHIMICA ACTA
Volume 100, Issue 4, Pages 223-229Publisher
WALTER DE GRUYTER GMBH
DOI: 10.1524/ract.2012.1909
Keywords
Ac-225; Ra-223; Thorium; Proton induced reaction; Cross section; Production yield calculation
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Cross sections O Ac-225, Ac-227, Th-227 and Th-228 in thorium-232 targets irradiated with protons in the energy range 21-141 MeV have been measured. Based on these data, production yields of Ac-225 and Ra-223 in thick thorium targets have been calculated. It is possible to produce in proton energy range 60-140 MeV at out 96 GBq (2.6 Ci) (225)AC per 10-d irradiation with 100 mu A proton beam current and 10-d decay, and much higher amount of Ra-223. The impurities of Ac-227 and Ra-224 are important and need to be assessed for further medical applications.
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