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A scintillation counter is a device used to detect and measure ionizing radiation, such as alpha particles, beta particles, and gamma rays. It operates on the principle of scintillation—the process by which certain materials emit flashes of light (photons) when they absorb ionizing radiation. ### Key Components of a Scintillation Counter: 1. **Scintillator**: This is the key component that emits light when it interacts with ionizing radiation.