Lead should be the material of choice in any design for X-ray or gamma radiation shielding. When other materials are considered, "comparisons are usually expressed in terms of lead because it represents the best practical gamma shield material for most applications." (Quoted from AECs authoritative "Reactor Shielding Design Manual"). It provides maximum protection with a minimum thickness therefore saving weight and space.
Partitions and walls, doors and window frames, transportation of radioactive materials, laboratories, dental offices, hospitals, mobile lead screens and nuclear energy.