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Dose: A general term used to refer to the effect on a material that is exposed to radiation. 1  Gray (Gy): The international system (SI) unit of radiation dose expressed in terms of absorbed energy per unit mass of tissue. 2  Sievert (Sv): A sievert is the standard international measurement of dose. 3  rad (R): The original unit developed for expressing ...
The AN/PDR-65 shown in figure 11-3 is designed to detect and measure gamma radiation. The set consists of two primary elements as follows: 1. The DETECTOR UNIT. The detector unit mustbelocatedatornearamasthead.Thefieldofview for the detector of an enveloping base surge cloud and resultant fallout must be relatively unobscured. As a