| 摘要 |
<p>A gamma ray detector and measurement device which comprises: a generally elongate housing (11); a scintillator module (12) movably mounted in said housing (11) and arranged to respond to the presence of gamma rays in the local environment in which the device is located and which rays pass through the wall (13) of the housing and into the scintillator module, said module having an optical output (14) for transmitting an optical signal after conversion within the module of the incoming gamma rays; and, an optical transducer module (15) also movably mounted in the housing (11) and having an input (16) arranged to receive the optical output from the scintillator module, said transducer module being able to convert the instantaneous optical output into an electrical output corresponding to the energy and flux of the incoming gamma radiations as detected in the scintillator module; in which the output (14) of the scintillator modules (12) and the input of the transducer module (15) are closely spaced to each other, and define a space (17) therebetween to be filled with an optical fluid to improve the transmission of the optical signal to the input of the transducer module; characterised in that a housing chamber (12a, 15a) is defined in said housing (11) and which is communicable with said space (17) between the output (14) of the scintillator module (12) and the input (16) of said transducer module (15), and in that a flow restrictor is in communication with said chamber and/or said space and is arranged, in use, to restrict fluid flow between the chamber and said space for the purpose of damping movement of either or both of said modules within said housing.</p> |
