多道脉冲幅度分析器死时间问题探讨

核分析能谱测量要用多道脉冲幅度分析器 ,这种分析器进行模数转换时需要一定的时间 ,使分析器产生漏计数。因而在相同测量时间内 ,对放射性强弱不同的样品进行测量时 ,漏计情况不同 ,造成相对测量条件不同 ,给测量分析带来误差。因此 ,为确保相对测量条件完全一致 ,测量结果更加可靠 ,必须对死时间进行修正

STUDY ON THE DEADTIME OF ANALYZER FOR PULSE RANGE OF MULTI-CHANNEL

A multi channel pulse extent analyzer is needed in the nuclear spectrum measurement. When the analogue signal is being converted into digital signal, a little dead time is wasted when the analyzer can't receive the single which arrives during this period. Though in the same time, the error still exists because different specimens are different in the radioactivity intensity. To make the result more correct, the dead time of the analyzer must be revised.