Energy resolution of liquid scintillator for α-particles and internal conversion electrons at lower temperatures

The energy resolution of α-particles from²⁴¹Am,²²²Rn,²¹⁸Po and²¹⁴Po and internal conversion electrons from^131mXe with a liquid scintillation system has been studied at temperatures from 13 °C to -65 °C. At lower temperatures the liquid scintillation system has shown to give better energy resolutions both for α-particles and internal conversion electrons compared with the values obtained at ordinary temperature. The phenomena were explained by the increase in light output of liquid scintillator at lower temperatures.