Title :
The feasibility of searching for contraband materials using a gamma-ray ´radar´ system
Author :
Ferguson, C. ; Ramsden, D.
Author_Institution :
Symetrica Ltd., Southampton, UK
Abstract :
A technique for searching for contraband materials that may be hidden behind a barrier is described. This imaging technique is based on the detection of one of the two annihilation photons produced by a positron-emitter that has scattered in the target, in coincidence with the detection of the second photon in a position-sensitive scintillation counter. The results of a feasibility study will be presented in which a 1mCi source was used to illuminate a 1times1 m2 area to provide a two dimensional image of the line-of-sight density within this object. The spatial-resolution achievable is -1times1 cm. Details of the detector design envisaged for this application will be described and the images generated through Monte Carlo simulations presented.
Keywords :
Monte Carlo methods; gamma-ray apparatus; gamma-ray detection; position sensitive particle detectors; scintillation counters; 1 cm; 1 m; 1E-6 Ci; 1mCi source; Monte Carlo simulations; annihilation photons; gamma-ray radar system; imaging technique; line-of-sight density; position-sensitive scintillation counter; positron-emitter; Landmine detection; Optical imaging; Particle scattering; Position sensitive particle detectors; Radar detection; Radar imaging; Radar scattering; Scintillation counters; Solid scintillation detectors; X-ray scattering;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2004 IEEE
Conference_Location :
Rome
Print_ISBN :
0-7803-8700-7
Electronic_ISBN :
1082-3654
DOI :
10.1109/NSSMIC.2004.1462630
