Chemical quenching and color quenching can keep energy from a radioactive event from making its way through the scintillation mechanism to the photomultiplier tube the stylized diagram above presents chemical quenching by water and color quenching by an organic nitrate as two possible obstacles to efficient counting. Liquid scintillation counting is the measurement of activity of a sample of radioactive material which uses the technique of mixing the active material with a liquid scintillator eg zinc sulfide and counting the resultant photon emissions the purpose is to allow more efficient counting due to the intimate contact of the activity with the scintillator. Fundamentals of liquid scintillation radioactive emissions and the use of isotopes in research measurement of radiation and isotope quantitation mechanism of liquid scintillation counting liquid scintillation signal interpretation counting efficiency and quenching chemiluminescence and static electricity the complete scintillation cocktail. Liquid scintillation counting lsc is the standard laboratory method to quantify the radioactivity of low energy radioisotopes mostly beta emitting and alpha emitting isotopes. Liquid scintillation counting samples are dissolved or suspended in a cocktail containing an aromatic solvent and small amounts of other additives known as fluors beta particles emitted from the sample transfer energy to the solvent molecules which in turn transfer their energy to the fluors the excited fluor molecules dissipate
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