Sector-shaped fast organic liquid scintillation detectors based neutron coincidence counter

K A A Gamage; M J Joyce; F D Cave

doi:10.1016/j.apradiso.2014.06.002

Sector-shaped fast organic liquid scintillation detectors based neutron coincidence counter

Appl Radiat Isot. 2014 Sep:92:1-5. doi: 10.1016/j.apradiso.2014.06.002. Epub 2014 Jun 12.

Authors

K A A Gamage¹, M J Joyce², F D Cave³

Affiliations

¹ Department of Engineering, Lancaster University, Lancaster LA1 4YR, UK. Electronic address: k.gamage@lancaster.ac.uk.
² Department of Engineering, Lancaster University, Lancaster LA1 4YR, UK.
³ Hybrid Instruments Ltd., The Gordon Manley Building, Lancaster University, Lancaster LA1 4YQ, UK.

PMID: 24972160
DOI: 10.1016/j.apradiso.2014.06.002

Abstract

A simulation based on the Monte Carlo method is described which has been performed using MCNPX 2.6.0, to model the geometry of a sector-shaped liquid scintillation detector in response to coincident neutron events. The detection of neutrons from a mixed-oxide (MOX) fuel pellet has been simulated for different thicknesses of scintillators. A layer of lead has been used to reduce the gamma-ray fluence reaching the scintillator and, the effect of lead for neutron detection has also been estimated by considering different thicknesses of lead layers.

Keywords: Monte Carlo simulations; Nuclear material assay; Safeguard applications; Sector-shaped liquid scintillation detector.