Photomultiplier and Radiation Detector

摘要

A radiation detection apparatus (2) is disclosed. The apparatus comprises a housing (20), a window (26) and a photomultiplier tube (24) for generating an electrical output signal dependent on the intensity of the electromagnetic radiation. A resiliently deformable optical coupling (28) is located between the window and the photomultiplier tube for allowing at least some electromagnetic radiation passing through the window to enter the photomultiplier tube. A scintillator element 8 converts gamma radiation into visible light entering the photomultiplier tube. Sealing silicone casting (56) is used to isolate the HV electrical terminals (34) of the PMT from the window.