Title :
Material recognition using neutron/gamma interrogation with time tagged fission sources
Author :
Fabris, Daniela ; Hao, Xin ; Lunardon, Marcello ; Moretto, Sandra ; Nebbia, Giancarlo ; Pesente, Silvia ; Stevanato, L. ; Viesti, Giuseppe ; Sajo-Bohus, Laszlo
Author_Institution :
INFN Sezione di Padova, Padova, Italy
Abstract :
Material recognition is studied by measuring simultaneously the transmission of neutron and gamma rays produced by a time-tagged 252Cf source. The possibility to derive direct signatures to identify light elements (C, N, O) by using the measured transmission versus neutron time of flight is demonstrated. The yield of the transmitted gamma ray as a function of energy in the range 0.1-5.5 MeV provides high precision identification of the atomic number of the sample. A tomography system, currently under construction, is described.
Keywords :
fission products; gamma-ray absorption; gamma-ray production; gamma-ray spectra; neutron absorption; neutron sources; neutron spectra; nondestructive testing; radioactive sources; atomic number; electron volt energy 0.1 MeV to 5.5 MeV; gamma interrogation; gamma-ray transmission; light element identification; material recognition; neutron interrogation; neutron time of flight; neutron transmission; time tagged 252Cf source; time tagged fission sources; tomography system; transmitted gamma-ray yield; Atomic measurements; Collimators; Electromagnetic wave absorption; Energy measurement; Gamma ray detection; Gamma ray detectors; Gamma rays; Neutrons; Time measurement; Tomography; 252Cf fission source; Non-destructive assay; gamma-ray spectra; neutron time of flight measurements; neutron-gamma transmission;
Conference_Titel :
Advancements in Nuclear Instrumentation Measurement Methods and their Applications (ANIMMA), 2009 First International Conference on
Conference_Location :
Marseille
Print_ISBN :
978-1-4244-5207-1
Electronic_ISBN :
978-1-4244-5208-8
DOI :
10.1109/ANIMMA.2009.5503657
