基于252Cf中子源自相关分析的核事件死时间测量与修正方法
Novel method for measuring and correcting dead-time using 252Cf neutron source based autocorrelation function in nuclear radiation detection
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摘要: 基于所研制的252Cf中子源频域测量系统，针对核探测系统的死时间使核事件丢失这一问题，利用自相关分析，研究了一种核探测系统死时间测量与修正的方法。试验测量结果表明：采用自相关图谱，可以直接获得高速频谱测量系统的死时间为40 ns，既方便又快捷，且测量精度高，达到了ns级，优于国外文献报道的类似核武器识别测量系统的死时间20 μs。Abstract: To solve the problem of dead time loss, a novel method for measuring and correcting dead-time is proposed with the use of autocorrelation function based on a 252Cf -source-driven spectrum analyzing system. The experiment shows that the dead-time of the analyzing system is 40 ns. The dead-time can be obtained directly from the spectrum of autocorrelation with high measuring precision of nanosecond level.
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Key words:
- nuclear radiation detection /
- dead-time /
- autocorrelation /
- correction /
- neutron source
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