脉冲中子测量中用长计数器校准闪烁探测器的方法

The method of calibrating scintillation detectorusing long counter in the pulse neutron measurement

介绍了采用长计数器与闪烁探测器相组合,通过长计数器对闪烁探测器进行适时校准,进而以闪烁探测器给出低产额脉冲中子注量(或产额)的方法。该方法既减小了长计数器单次计数少引起的统计涨落,又避免了闪烁探测器受γ本底影响大的缺陷,同时还充分利用了长计数器平能量响应以及闪烁探测器探测效率的优点,将长计数器成功地运用于脉冲中子辐射场中,在脉冲中子辐射场中通过长计数器实现了中子注量(率)的量值传递,实现了脉冲中子源中子产额的测量。

A kind of method of measuring low yield pulse neutron fluence was introduced in this paper. In this method, a scintillation detector and a long counter were used together. And in measurement, the scintillation detector was calibrated by the long counter, and the result of the measurement was given by the scintillation detector. This method reduced the fluctuation caused by the small counting value of every time, overcame the defect that the scintillation detector would be strongly influenced by γ background, and could also take advantage of the long counter's smooth energy respondence and the scintillation detector's high efficiency. By this method, the neutron fluence's value transfer and the pulse neutron yield's measuring were realized at the same time.