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Demonstration of isotope imaging method by nuclear resonance fluorescence

Kikuzawa, Nobuhiro ; Hajima, Ryoichi; Hayakawa, Takehito; Shizuma, Toshiyuki; Toyokawa, Hiroyuki*; Ogaki, Hideaki*; Minehara, Eisuke

Laser-Compton-backscattered photons from an energy-recovery linac (ERL) and a high power laser realize a high-efficiency, high-flux and tunable monochromatic $$gamma$$-ray source. A nondestructive assay method by using the monoenegetic $$gamma$$-rays and nuclear resonance fluorescence (NRF) make possible to isotope imaging. The purpose of our work is to demonstrate of the NRF-based isotope imaging system. For this evaluation, we are developing a GEANT4-based Monte Carlo simulation code. In the simulation, we assume metal cubes (4$$times$$4$$times$$4 mm) of U238 and lead are contained in a concrete block of 5 cm thickness. The simulation results indicate that the nondestructive $$gamma$$ spectrometric method can be applicable in the isotope imaging.

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