Which best blocks X-ray particles and can therefore be observed more closely through the use of this technology?

X-rays are high energy electrons that can cause damage when exposed under extreme conditions. The best technology that can block it is t using a lightweight type of metal foam. It can take in high energy collisions which also exhibits high forces. it does not only block x-rays but also, neutron radiation and gamma rays.

Using most metals will block x-rays from passing through, as almost all metals absorb x-rays and prevent their transmission, in X-ray rooms thin films of metal and metal lined clothing can be used to prevent their exposure.