本文对液体闪烁计数器的串光谱进行了分析研究，并研制了一只幅度运算串光甄别器。液体闪烁计数器使用了该串光甄别器后，对

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C测量的本底计数率由3.499±0.059cpm，下降为2.222 ±0.027cpm，优值由1820上升为2738，效率仍能达78.0%，空室计数率由4.560±0.067cpm下降为1.156±0.034cpm。

The crosstalk spectra of liquid scintillation counter were analysed and investigated in this paper. We have manufactured a crosstalk discriminator. By using the discriminator in the liquid scintillation counter

the background of measuring

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C was decreased from 3.499±0.059cpm to 2.222±0.027cpm; the merit was increased from 1820 to 2738; but the efficiency still reached to 78.0%; the count of empty bottle was decreased from 4.560±0.0675cpm to 1.156±0.034cpm.