²²⁵Ac production via ²²⁶Ra (μ⁻, n ν) ²²⁵Fr reaction with ²²⁶Ra target

Actinium-225 (²²⁵Ac) has attracted global attention due to its applications in cancer therapy. A new ²²⁵Ac production method is proposed by muon nuclear-capture reactions with negative muons (μ⁻) irradiating on a ²²⁶Ra target. The ²²⁵Fr is produced by ²²⁶Ra (μ⁻, n ν) ²²⁵Fr reaction and decays to ²²⁵Ra. The ²²⁵Ra subsequently decays to ²²⁵Ac. The method produces no carrier-added ²²⁵Ac, and ²¹³Bi from a ²²⁵Ac-²¹³Bi generator. The production method by muon nuclear-capture reactions with the ²²⁶Ra target is described. The radioactivity of ²²⁵Ac and ²¹³Bi are calculated assuming the reaction branching ratio of ²²⁶Ra (μ⁻, n ν) ²²⁵Fr.