A shield in the form of a package designed to contain and allow the controlled use of one or more sealed sources for the purpose of making radiographic exposures.
Tungsten alloy (heavy alloy) (rt), английский A shielding material containing tungsten, copper, and nickel, and having a density about 50 percent greater than that of lead.
Pulse (ut), английский A series of vibrations or oscillations having a brief duration.
