Fig. 1

Decay chain of Ra-224 with data on half-lives [23] and energy deposition per transition [22]. E(α) and E(β) state the energy per transition for the α-particles and recoil nuclei (α) and the β-particles, conversion electrons and Auger electrons (β) considered for the calculation of the absorbed doses to the blood. E(γ) states the energy per transition for the X- and γ-radiation. However, E(γ) was not considered for the calculation of the absorbed doses to the blood due to the low interaction probability in the geometry of the incubation tube