Figure 4.

Nuclear recoil effect during α-decay within atomic in vivo nanogenerators. Schematic representation of the conservation of momentum law describing the transfer of the decay energy to the α-particle and daughter nucleus. The recoiling daughter nucleus can move up to ≈100 nm with each single α-decay and, hence, could travel considerable distances in a water-like environment (e.g., tissue). Note: The position of the α-particle is to show direction and not position.