Bragg peak

The Bragg peak refers to the maximum ionization density deposited by a charged particle as it slows down in a medium, occurring near the end of its path. Ionizing radiation, which has enough energy to displace electrons from atoms and molecules, is used in radiation therapy to destroy cancer cells.12

When charged particles travel through matter, they deposit energy along their tracks. As the particle's velocity decreases, its ionization density increases, reaching a peak—the Bragg peak—before quickly diminishing. This phenomenon is crucial in particle beam therapy, such as proton therapy, where the Bragg peak allows for precise targeting of tumors while minimizing damage to surrounding healthy tissues.12