Neutron radiation can be shielded by:

Neutron radiation is a type of ionizing radiation that is particularly challenging to shield against because neutrons are uncharged particles. The effectiveness of shielding materials depends on their ability to slow down and absorb these neutrons. Water is an effective neutron shield because it contains hydrogen, which has a similar mass to neutrons. When neutrons collide with the hydrogen atoms in water, they lose energy through elastic scattering, which can significantly reduce their intensity.

In comparison, materials such as paper, clothing, and safety glasses are composed of mostly lighter elements that lack sufficient hydrogen content and atomic structure to effectively slow down and capture neutrons. These materials offer little to no attenuation of neutron radiation, making them inadequate choices for protection in environments where neutron exposure is a risk. Thus, water stands out as a suitable option for effective neutron shielding.