affiliation not provided to SSRN
Actinium-225, activity standard, liquid scintillation counting, TDCR, gamma-ray spectrometry, radionuclide calibrator, radiopharmaceutical therapy, Targeted alpha therapy, long-lived impurities, breakthrough
photon emission intensity, half-life, Ac-225, gamma-ray spectrometry, emission probabilities, breakthrough impurities, Ra-225