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 radioactive activity of a sample 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. View detailed information on how to prepare various sample types for liquid scintillation counting top quench read more about quenching and quench correction quenching occurs when the energy emitted by a radioisotope is not transferred completely into light and therefore is not detected by the pmt of the counting instrument the decrease in . Abstract two types of quenching are encountered in liquid scintillation counting chemical and color quenching chemical quenching is caused by the presence of nonfluorescent molecules in the liquid scintillator system which interfere with the energy transfer between the solvent and the organic scintillator. Of photons light results in quenching in the sample there are two main types of quench chemical quench12 and color quench134 chemical quench quench curves in liquid scintillation counting application note authors jock thomson perkinelmer inc waltham ma liquid scintillation 2 color quench
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