FOAM VS. NUCLEAR RADIATION
The team first produced a foam shield that could block radiation.
This foam is able to stop and block X-rays. In tests, it can even protect against various forms of gamma rays.
Uh, unlikely for gamma:It's metal. Astronauts already use metal foil layers to protect themselves from those frequencies.
Gamma rays are high-energy waves that can travel at the speed of light and penetrate many substances, including metal. Gamma rays are used to treat cancer and to produce diagnostic images. A few inches of lead is enough to block gamma rays -- which is why you wear a lead apron when you get x-rays -- but at least 3 meters of concrete are needed to stop them. Again, the precise measurement depends on the dosage of radiation, and a Geiger counter is needed to gauge the exact radiation amount and thickness of materials needed to stop it.
Not high-energy gamma rays, but apparently the geometry gives it an advantage at blocking low-energy gamma rays, compared to the same weight of material in solid form.Uh, unlikely for gamma: