LOW COST, ROBUST AND HIGH SENSITIVITY ION-CONDUCTING POLYCRYSTALLINE RADIATION DETECTORS

Abstract: a detector for gamma irradiation comprises an oxygen ion conducting polycrystalline solid, has positively charged grain boundaries or negatively charged grain boundaries and is coupled to electrodes that measure changes in the polycrystalline solid's ionic conductance. the polycrystalline solid may include lightly doped gd-doped ceo, a polycrystalline ion conducting ceramic. the steady state passivation of space charge barriers at grain boundaries that may act as virtual electrodes, capturing radiation-induced electrons, in turn lowering space charge barrier heights, and thereby exclusively modulating the ionic carrier flow within the ceramic electrolytes. such behavior may allow for an electrical response under low fields, i.e., <2 v/cm. the polycrystalline solids disclosed herein may be used in inexpensive, sensitive, low-power and miniaturizable solid-state devices, uniquely suited for operating in harsh (high temperature, high humidity, pressure, and/or corrosive) environments. the detectors disclosed herein may be suitable for simultaneous spectroscopy and dosimetry measurements.

Inventor(s): Harry L. TULLER, Thomas DEFFERRIERE, Jennifer Lilia Marguerite Rupp, Ju LI, Ahmed Sami Helal Ali Elwakeil

CPC Classification: G01T1/185 (MEASUREMENT OF NUCLEAR OR X-RADIATION (radiation analysis of materials, mass spectrometry ; tubes for determining the presence, intensity, density or energy of radiation or particles ))

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