A scintillation detector is a device used to detect and measure ionizing radiation, such as alpha, beta, and gamma rays. It works by using a special material called a scintillator, which emits flashes of light (or scintillations) when it interacts with radiation. These flashes are then converted into electrical signals by a photomultiplier tube or a photodiode, allowing scientists to measure the intensity and energy of the radiation. Scintillation detectors are widely used in various fields, including nuclear medicine, radiation safety, and environmental monitoring. They are valued for their sensitivity and speed, making them essential tools for detecting radioactive materials and ensuring safety in environments where radiation is present.