Combining Monte Carlo simulation and experimental data for determining the density of polymer materials in gamma scattering and gamma transmission measurements

Two approaches based on gamma scattering technique (GST) and gamma transmission technique (GTT) have been devised and evaluated for measuring the density of polymers. The approach consists of combining Monte Carlo simulation and experimental data to determine the polymer density. The reliability of the proposed approaches is verified by experimental measurements with nine different polymers. The average relative deviation between the measured and the reference densities is under 2% for both two approaches. For the uncertainty of measured density, the GST yields better results with an average relative uncertainty of 1.61%, while this value for the GTT is 5.67%.