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The CANDLES trigger system is used for the study of Double Beta Decay of 48Ca. The detector of this experiment consists of CaF2 crystals as the sources and the detectors, immersed in the liquid scintillator as a 4π active shield. Because the decay constant of liquid scintillator (∼a few10ns) is a few ten times shorter than that of CaF2 scintillator (∼1µs), if we trigger the signal by the pulse height,...
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