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Detection of landmines by using 14 MeV neutron tagged beams
M Lunardon1, G Nebbia, S Pesente
1Dipartimento di Fisica, dell' Università di Padova, INFN Sezione di Padova, Via Marzolo 8, Padova I-35131, Italy.
Abstract:
A large-area scanning system using 14 MeV tagged neutrons has been built. The associated (4)He particles emitted in the D+T reaction are detected in an array of Parallel Plate Avalanche Counters that defines a scanning plane having about 10 x 100 cm(2) area. Coincident gamma-rays are detected by 10 BaF(2) scintillators. The capability of the system to determine the presence and the position of samples and to perform an on-line background subtraction is demonstrated. Test with landmines are also reported. This technique allows a significant improvement of the signal-to-noise ratio searching for hidden threat materials. The use with portable sealed-tube generators is foreseen.
