A comparison of collimator geometries for imaging mixed radiation fields with fast liquid organic scintillators

Conference · Fri Jul 01 00:00:00 EDT 2011

DOI:https://doi.org/10.1109/ANIMMA.2011.6172943· OSTI ID:22039819

Gamage, K A. A.; Joyce, M J ^[1]; Taylor, G C ^[2]

---

1. Engineering Dept., Lancaster Univ., Lancaster, Lancashire, LA1 4YR (United Kingdom)
2. Neutron Metrology Group, National Physical Laboratory, Teddington, Middlesex, TW11 0LW (United Kingdom)

As a result of recent advances in digital pulse-shape discrimination methods it has become possible to image mixed fields (radiation environments compromising both neutrons and gamma rays) relatively quickly with a single, organic liquid 'fast' scintillator within a heavy metal collimator. The use of a liquid scintillator has significant benefits over other techniques for imaging radiation environments as the acquired data can be analysed to provide separate information about the gamma and neutron emissions from a source (or sources) in a single scan. The imaging resolution achieved is fundamentally related to the detector efficiency and to the collimator geometry. In this paper the impact of using two different geometries of tungsten collimator are compared experimentally and three different materials considered in the Monte Carlo simulation, in order to determine the optimum set-up for mixed-field imaging. The measurements were performed in the low-scatter facility of the National Physical Laboratory, Teddington. (authors)

• OSTI ID: 22039819
• Resource Relation: Conference: ANIMMA 2011: 2. International Conference on Advancements in Nuclear Instrumentation, Measurement Methods and their Applications, Ghent (Belgium), 6-9 Jun 2011; Other Information: Country of input: France; 23 refs.; IEEE Catalog Number: CFP1124I-CDR
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
COLLIMATORS
COMPARATIVE EVALUATIONS
COMPUTERIZED SIMULATION
DIGITIZERS
EFFICIENCY
GAMMA RADIATION
HEAVY METALS
IMAGES
INORGANIC PHOSPHORS
LIQUID SCINTILLATORS
MONTE CARLO METHOD
NEUTRON EMISSION
NEUTRONS
PERFORMANCE
PULSE SHAPERS
RESOLUTION
SCINTILLATION COUNTERS
TUNGSTEN