NDLI: A phantom for research studies of radiologically-contaminated land

Content Provider	IEEE Xplore Digital Library
Author	Adams, J.C. Mellor, M. Joyce, M.J.
Copyright Year	2010
Description	Author affiliation: Engineering Department, Lancaster University, Lancaster. LA1 4YR (Joyce, M.J.) \|\| Engineering Department, Lancaster University, Lancaster. LA1 4YR, UK (Adams, J.C.) \|\| Createc Ltd, Whitehaven, Cumbria, CA24 3HZ, UK (Mellor, M.)
Abstract	A phantom designed for the study of radiologically-contaminated land is described. The phantom comprises a bespoke, 1 $m^{3}$ outer tank and an inner tube matrix for the deployment of γ-ray emitting radioactive sources. The phantom was filled to a depth of 900mm with dry sandy loam to mimic soils found in areas surrounding nuclear legacy facilities in the U.K. A series of non-intrusive spectral measurements were taken using an automated scanning rig and a cadmium telluride γ-ray detector. The detector was clamped at a constant height above the phantom, face-down and sequenced over a pre-defined grid above the phantom, using a scanning rig. A small caesium-137 source was positioned at a depth of 150mm in one of the tubes at random. Scans were then conducted at 30 minute intervals at twelve separate measurement points, to allow sufficient counting time to isolate the γ-ray caesium-137 662 keV photopeak from the background. A CAD model was then built of a simplified albeit geometrically correct representation of the phantom and the reading points. The combination of this model and the imported γ-ray spectra has enabled the inverse modelling technique N-Visage™ to be validated against the accurate surface location for the source without prior knowledge.
Starting Page	1239
Ending Page	1243
File Size	482501
Page Count	5
File Format	PDF
ISBN	9781424491063
ISSN	10957863
e-ISBN	9781424491056
DOI	10.1109/NSSMIC.2010.5873965
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-10-30
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Electron tubes Phantoms Soil Pollution measurement Solid modeling Software Soil measurements Radioactive pollution Gamma rays Gamma distributions Nuclear measurements
Content Type	Text
Resource Type	Article

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