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首页> 外文期刊>Nuclear Instruments & Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment >Extension of the Dytlewski-style dead time correction formalism for neutron multiplicity counting to any order
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Extension of the Dytlewski-style dead time correction formalism for neutron multiplicity counting to any order

机译：Dytlewski式停滞时间校正形式主义的扩展，可将中子多重性计数为任意阶

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摘要

Neutron multiplicity counting using shift-register calculus is an established technique in the science of international nuclear safeguards for the identification, verification, and assay of special nuclear materials. Typically passive counting is used for Pu and mixed Pu-U items and active methods are used for U materials. Three measured counting rates, singles, doubles and triples are measured and, in combination with a simple analytical point-model, are used to calculate characteristics of the measurement item in terms of known detector and nuclear parameters. However, the measurement problem usually involves more than three quantities of interest, but even in cases where the next higher order count rate, quads, is statistically viable, it is not quantitatively applied because corrections for dead time losses are currently not available in the predominant analysis paradigm. In this work we overcome this limitation by extending the commonly used dead time correction method, developed by Dytlewski, to quads. We also give results for pents, which may be of interest for certain special investigations. Extension to still higher orders, may be accomplished by inspection based on the sequence presented. We discuss the foundations of the Dytlewski method, give limiting cases, and highlight the opportunities and implications that these new results expose. In particular there exist a number of ways in which the new results may be combined with other approaches to extract the correlated rates, and this leads to various practical implementations.
机译：使用移位寄存器演算的中子多重计数是国际核安全保障科学中用于识别，验证和分析特殊核材料的一项成熟技术。通常，Pu和混合的Pu-U项目使用被动计数，而U材料使用主动方法。测量了三个测量的计数率（单重，双重和三重），并结合了简单的分析点模型，用于根据已知的探测器和核参数计算测量项目的特征。但是，测量问题通常涉及三个以上的感兴趣的量，但是即使在下一个较高阶的计数率quad在统计上可行的情况下，也无法定量应用，因为当前主要无法获得空载时间损失的校正。分析范式。在这项工作中，我们通过将Dytlewski开发的常用停滞时间校正方法扩展到四边形来克服此限制。我们还给出了笔数的结果，某些特殊调查可能会对这些结果感兴趣。扩展到更高的级别，可以根据所显示的顺序通过检查来完成。我们讨论了Dytlewski方法的基础，给出了有限的情况，并强调了这些新结果所揭示的机会和启示。特别地，存在许多可以将新结果与其他方法结合以提取相关速率的方法，这导致了各种实际的实现。

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