A recent study has utilized Monte Carlo simulations to evaluate the radiation damage caused by low-energy Auger and conversion electrons emitted during the decay of the Cerium-134 isotope (¹³⁴Ce). These electrons, typically with energies below 1 keV, are known to deposit a high dose of energy in microscopic volumes, making them potentially damaging agents in biomedical applications, especially in targeted radiotherapy. The research focused on quantifying the extent of this damage at the molecular level, a crucial aspect for optimizing the use of radioisotopes in medicine.

The Monte Carlo method allowed for precise modeling of the trajectory and interaction of electrons with biological tissue at the nanoscale. By simulating the decay of ¹³⁴Ce, researchers were able to determine the spatial distribution of deposited energy, as well as the formation of reactive oxygen species and the induction of DNA breaks. The results provide a detailed understanding of the mechanisms by which these low-energy electrons can cause significant cellular damage, despite their short range.

This work is fundamental for the development of new strategies in nuclear medicine, where isotopes such as ¹³⁴Ce, or its decay products like ¹³⁴La, are being explored for oncological treatments. Understanding and quantifying radiation damage at the subcellular level is essential for designing safer and more effective radiopharmaceuticals, minimizing damage to healthy cells while maximizing tumor cell destruction. The ability to accurately predict the biological effects of these low-energy electrons opens new avenues for dosimetry and treatment planning.