【摘要】 利用电流型闪烁探测器采用直照法测量零功率堆装置的瞬发中子时间系数α时,由于示波器基线旋转导致产生测量误差。通过采用数学分析方法对误差进行分析计算,得到该误差呈现一阻尼震荡波形。当基线旋转约为θ=±5°,最大的差别与设计值相差1μs-1,正负极差可达1.5μs-1。通过合理选取实验数据拟合时间段,即可消除该误差,提高实验数据的可靠性。更多还原

【Abstract】 Using the method of irradiating the zero-power device directly, the neutron decay constant was measured with the ST-PMT detector system. During the measuring display, there were some errors exicted because of the base-line rotation in the oscilloscope display. The shape of errors was displied in the formation of damped vibration.When the value of base-line rotation in the oscilloscope is about ±5°,the max data of neutron decay constant error is 1 μs-1 and the maximum error both the position and the negation is 1.5 μs-1. The errors are eliminated by chosen the duration of the experiment data reasonably.更多还原