Experimental verification of scattering simulation in flash radiography

The accurate Monte Carlo (MC) simulation of scattering X-ray intensity is crucial in high energy flash radiography. On the basis of introducing the calculation method of exposure, a way for experimentally testifying the MC scattering simulation is proposed according to the main scattering source. The key is to construct a pair of correlated experiments which have the same direct component and different scattering component, so their image gray difference is related to their scattering difference ΔX, where ΔG can be measured experimentally and ΔX can be calculated by MC simulation. ΔG and are measured and calculated in three different radiography models. It is found that in all the three models the ΔG have similar distribution with ΔX, and the ratio ΔG/ΔX is nearly same as 4.95. This confirms the validation of the method and also confirms the correctness of the MC scattering simulation results. (authors)