Non-destructive inspection of elemental and isotopic composition of materials concealed by heavy shields such as iron plates with a thickness of several centimeters has been possible. This method uses nuclear resonance fluorescence (NRF) triggered by an energy-tunable laser-Compton scattering (LCS) gamma-ray source. One-dimensional mapping of a lead block hidden behind 1.5-cm-thick iron plates was obtained by measuring an NRF gamma-ray of a lead isotope 208Pb. We observe a 5512-keV gamma-ray from 208Pb excited by the quasi-monochromatic LCS gamma-rays with energies up to 5.7 MeV. The edge position of the lead block is consistent with the exact position within the uncertainty. 

To access the rest of the information on this page,
Log In or sign up for a free B-Bridge account: