Liquid scintillators are materials that emit light when charged particles pass through them. They are typically composed of organic solvents mixed with fluorescent compounds, which help convert the energy from the particles into visible light. This light can then be detected and measured, making liquid scintillators useful in various applications, including particle physics and radiation detection. These substances are often used in experiments involving neutrinos and nuclear physics, as they can effectively capture and measure low-energy particles. Liquid scintillators are favored for their ability to provide high light output and fast response times, enhancing the accuracy of measurements in scientific research.