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本工作采用三参数数据获取和离线分析,对延迟谱数据处理作了改进,发展了特殊类型的矩心漂移法。一次测量得正向和反向延迟符合谱,它们各自重心间的差,即为平均寿命τ。在矩心无漂移法计算中不需要测量瞬发时间谱,从而解决了由于瞬发谱和延迟符合谱不同时测量、电子学仪器和测量条件改变造成的影响。把正向状态和反向状态下所得的寿命取平均值,减少了系统误差。我们的实验结果T_(v_2)=129.5±1.4ps。把实验约化跃迁几率与各理论值进行比较,结果与单质子假设符合很好。
This work uses three-parameter data acquisition and offline analysis, the delay spectrum data processing has been improved, the development of a special type of centroid drift method. A measurement of positive and negative delay in line with the spectrum, the difference between their respective centers of gravity, is the average life expectancy τ. It is not necessary to measure the instantaneous time spectrum in the calculation of the centroid drift-free method, so as to solve the influence caused by the change of the electronic instruments and the measurement conditions due to the instantaneous spectrum and the delayed coincidence spectrum being not measured at the same time. Averaging the lifetimes obtained in the forward and reverse states reduces the systematic error. Our experimental result T_ (v_2) = 129.5 ± 1.4ps. The probability of experimental reduced transition is compared with the theoretical values, and the result is in good agreement with the single proton hypothesis.