Patent
Radiant ray detector
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TLDR
In this article, the authors proposed to increase the propagation efficiency of light between the scintillator and the photo detector by forming the silicon nitride film on the inorganic scintillation surface with plasma glow discharge.Abstract:
PURPOSE: To increase the propagation efficiency of light between the scintillator and the photo detector, by forming the silicon nitride film on the inorganic scintillator surface with plasma glow discharge. CONSTITUTION: Since the inorganic substance scintillator 1 such as NaI(Tl), CsI(Tl), and Bi 4 Ge 3 O 12 has greater refractive index as 1.85W2.15, the reflection loss on the surface of light is greater. The film 2 of silicon nitride is vacumm- evaporated on the surface of the scintillator with plasma glow discharge. The silicon nitride film 2 gives the refractive index of 1.5W2.1 when the temperature of substrate is changed in the range of 40W300°C. The surface reflection of the scintillator can be reduced by changing continuously the refractive index of silicon evaporation film evaporated on the surface of scintillator 1 or taking it to a suitable value for the prevention of reflection. COPYRIGHT: (C)1980,JPO&Japioread more
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Radiation detector system using an inorganic scintillator crystal detector with an optical filter for aerial dosemetry
TL;DR: A radiation detector system used in aerial dosimetry in which an inorganic scintillation crystal detector and spectral filter are coupled to a photomultiplier tube and the requisite electronic circuits is described in this article.