n-[Gamma] pulse discrimination method and system based on improved centroid algorithm

Abstract

The present invention discloses an n-[Gamma] pulse discrimination method and system based on an improved centroid algorithm. The method comprises the steps of: taking a centroid algorithm as a basis,adding a fine-tuning item walk to improve the algorithm performance which is called as an improved centroid algorithm; processing the obtained pulse data through the improved centroid algorithm to determine a pulse amplitude scatter diagram; performing direct statistics of pulse amplitude scattering points to obtain a one-dimensional linear discrimination threshold value, and obtaining an n-[Gamma] discrimination spectrogram. The n-[Gamma] pulse discrimination method is employed to separate an n pulse area from a [Gamma] pulse area, is low in computing complexity and high in discrimination ability, and can meet the real-time discrimination system requirements. Besides, the method and the system provided by the invention have universal relevance capacity for pulses in different conditions such as sampling frequencies, sample lengths and radioactive source types, and have obvious popularization and engineering application values.

Description

technical field [0001] The invention relates to the technical field of n-γ radiation field measurement and data processing thereof, in particular to an n-γ pulse discrimination method and system based on an improved centroid algorithm. Background technique [0002] Many nuclear technologies and applications require on-site measurement of n-rays (neutron rays) and gamma rays, such as radioactive material inspection in customs security inspections, nuclear material identification in arms control inspections, explosive and drug detection in anti-terrorism and stability maintenance, etc. . However, since neutron detectors are often sensitive to γ-rays, the n-γ-ray real-time screening technology becomes the key when performing n-γ-ray real-time measurement or n-γ-ray joint real-time measurement. [0003] In the field of n-γ-ray screening technology, for n-rays and γ-rays that have a certain time relationship, the difference in particle time of flight (Time Of Flight, TOF) can be...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of n-γ pulse discrimination method and system based on the improved centroid algorithm creatively on the basis of considering the low complexity and high accuracy dual indicators required by the real-time performance of the discrimination algorithm, to overcome the The traditional n-γ screening method requires a dedicated electronic plug-in, high cost, complex structure, difficult and unstable signal debugging, and also overcomes the existing off-line n-γ screening algorithm, which is too complicated to calculate Meet real-time requirements

Images