The gamma-ray experiment results shows the metallic foam itself attenuates less
gamma-ray compared to bulk material, as a consequence of saving weight. The results also
predict a tendency that by filling foam with liquid, the attenuation ability of the sample
would be better than the pure bulk material and its base material the foam made from. At the
same time it owns the advantage of saving weight. The liquid filled in foam in this work
water and boric acid solution. It has been found out to have almost the same effect on
attenuating gamma-ray.