A liquid scintillator is a transparent liquid material that emits flashes of light (scintillation) when charged particles or radiation pass through it. This property makes liquid scintillators valuable in radiation detection and measurement, such as in nuclear physics experiments, medical imaging, and environmental monitoring. When ionizing radiation interacts with the liquid, it excites the molecules, which then release photons as they return to their ground state. The emitted light is detected by photomultiplier tubes or other sensors, enabling precise measurement of radiation type and intensity. Liquid scintillators can be tailored for specific applications by adjusting their chemical composition, enhancing their sensitivity and selectivity for certain particles or energy ranges.