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A special stabilization system has been constructed to control the overall gain of photomultiplier tubes in a liquid scintillation counter. The system uses GaAsP light emitting diodes in the measurement chamber to produce separate reference light pulses for each photomultiplier tube. The system has provided a significant improvement in both short and long term stability and in operational reliability.
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Erkki Soini (1975) studied this question.
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