Beta particle decay represents a type of radioactive decay in unstable atomic nuclei, characterized by the emission of a high-energy electron ($\beta^-$) or a positron ($\beta^+$). This process alters the nuclear composition, changing the ratio of protons to neutrons within the nucleus in an effort to achieve stability. The resulting emitted particles carry significant energy and are classified as forms of ionizing radiation. When these particles interact with matter, they cause ionization—the stripping of electrons from atoms—which can lead to chemical changes and potential biological damage. The study of beta emission is critical in physical sciences for understanding nuclear stability and in health sciences for assessing the risk and biological effects of environmental or internal radiation exposure.