Figure 2.

Schematic representation of the atomic in vivo nanogenerator ²²⁷Th (τ_½ = 18.7 d, E_α = 6.0 MeV). ²²⁷Th decays through five net α-disintegrations (six in total) and two net β^–-disintegrations (three in total) into stable ²⁰⁷Pb. ²²⁷Th possess at least four eligible γ-emissions for detection, 235 keV (I = 12.9%, ²²⁷Th), 269 keV (I = 13.9%, ²²³Ra), 405 keV (I = 3.8%, ²¹¹Pb), and 351 keV (I = 13.0%, ²¹¹Bi). The most prominent daughter radionuclide is ²²³Ra (τ_½ = 11.4 d, E_α = 6.3 MeV), which is also used for TAT itself. The half-life (τ_½), known energies connected to recoil events (translational kinetic energy E_t), and the decay energies (E_α, E_β, E_γ) are indicated on the scheme. Data were derived from Nucleonica GmbH, Nuclide Datasheets, Nucleonica Nuclear Science Portal (www.nucleonica.com), Version 3.0.65, Karlsruhe (2017).