The neutron spectral moments method in the time-of-flight domain

2024/11/19 by Brian Appelbe, Aidan Crilly, Appelbe, Brian D. +1
Engineering · Physics and Astronomy · #FOS: Physical sciences #Nuclear Physics and Applications #Nuclear reactor physics and engineering #Plasma Physics (physics.plasm-ph) #Quantum, superfluid, helium dynamics

paper · pdf · doi:10.48550/arxiv.2411.12414

openalex publication_date 2024/11/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

An analysis methodology is developed for the time-of-flight (TOF) signals recorded by two or more collinear neutron detectors located at different distances from a pulsed neutron source. It is based on taking central moments of the TOF signals and relating these to a set of co-moments of the distribution of production times and velocities of neutrons emitted towards the detectors. Given n detectors, we can obtain all such co-moments of order n-1 and lower. Co-moments contain information on the time-varying behaviour of the neutron source. A physical interpretation is provided for several co-moments of interest.

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