How does back-scatter radiation work?

Back-scatter radiation occurs when high-energy particles, such as X-rays or gamma rays, interact with matter and are deflected back toward the source of the radiation. This process typically involves the scattering of photons off electrons in the material, resulting in a change in the direction of the photons. Back-scatter radiation is commonly used in security scanning technologies, as it allows for the detection of concealed objects by analyzing the energy and intensity of the scattered radiation. The presence of different materials alters the back-scattered signal, enabling the identification of various substances.