Radiation detector system using an inorganic scintillator crystal detector with an optical filter for aerial dosemetry

Claim 1

A radiation detection system for aerial dosimetry comprising: an elongated cylindrical detector container having a radiation transparent end window at an input end and an electrical connector at an output end; a solid inorganic scintillator crystal positioned adjacent said end window wherein said scintillator crystal and said end window are potted to said detector container; a blue optical filter contiguous with said solid inorganic scintillator crystal; and a photomultiplier tube surrounded by a lead shield within said detector container and having an input end positioned adjacent said blue optIcal filter and an output end having electrical leads connected through said electrical connector to dosimetry electronics inside a computer in which radiation emitted from a monitored area near the ground passes through said end window and is incident on said solid inorganic scintillator crystal resulting in residual optical radiation therefrom being filtered and only the initial radiation therefrom being transmitted by said blue filter to said input of the photomultiplier tube for converting to an electrical output signal monitored by said dosimetry electronics.