English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Fast neutron multiplicity measurement technology uses scintillator detectors for measurement, which plays an important role in the attribute certification of nuclear materials. At present, the fast neutron multiplicity measurement methods for plutonium materials are relatively mature, and the fast neutron multiplicity analysis model and measurement equations of uranium materials are still under development. In order to establish the active fast neutron multiplicity measurement equation for uranium materials, based on the derivation process of NMC analysis equation, this paper uses the probability generating function to complete the derivation of the fast neutron multiplicity measurement equation of uranium materials according to the difference between the physical processes of uranium and plutonium materials, without considering the reaction ofand the influence of fast neutron scattering crosstalk. On this basis, in order to verify the validity of the measurement equation, Geant4 is used to build a 3x8 well-type detection system for simulation measurement. By analyzing the fitting function relationship between the coupling coefficient and the value-added coefficient, the multiplicity counting rate, and the solution deviation of the quality, the reliability and the accuracy of the measurement equation are confirmed, which is of great significance to the development of fast neutron multiplicity technology.

The derivation of the fast neutron multiplicity measurement equation of the uranium material