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Active Interrogation of Nuclear Materials Using LaBr3: Ce Detectors

Author:
Omer, Mohamed   Negm, H.   Zen, H.   Hori, T.   Kii, T.   Masuda, K.   Ohgaki, H.   Hajima, R.   Hayakawa, T.   Daito,    Shizuma, T.   Fujiwara, M.   Park, S.H.   Kikuzawa, N.   Rusev, G.   Tonchev, A.P.   Wu, Y.K.  


Journal:
Energy Procedia


Issue Date:
2013


Abstract(summary):

Active interrogation in U-235 was demonstrated with LaBr3:Ce scintillation detectors using the nuclear resonance fluorescence (NRF) technique. An NRF experiment was performed at the High using Intensity gamma-ray Source (HI gamma S) facility using quasi-monochromatic circularly or linearly polarized gamma-ray beams. Photons scattered at 90 degrees relative to the incident beam were detected with two different sizes of cylindrical LaBr3:Ce detectors. Clear NRF peaks at 1733 and 1815 keV corresponding to de-excitations to the ground state and/or low-lying levels in U-235 were observed within 77 minutes of beam time even under the high background due to the self-activity of LaBr3:Ce and the radioactive decay of Bi-214 nuclei existing in the U-235 target. The present study shows a possibility of using LaBr3:Ce detector to perform NRF experiments, promoting many options for inspection of special nuclear materials. (C) 2013 The Authors. Published by Elsevier B.V.


Page:
50-56


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