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Gamma radiation nose system based on In2O3/SiO thick-film sensors

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2 Author(s)
Arshak, K.I. ; Electron. & Comput. Eng. Dept., Univ. of Limerick, Ireland ; Korostynska, O.

A prototype gamma radiation monitoring system based on In2O3/SiO thick-film sensors array was designed. Four sensors had an identical pn-heterojunction structure with different material compositions. These sensors were subjected to gamma radiation emitted by 137Cs source with an activity of 370 kBq. Changes in their current-voltage characteristics were recorded and compared. The performance parameters of the devices, such as sensitivity to γ radiation exposure and working dose region, were found to be highly dependent on the composition of the materials used. To cover a wider range of radiation and improve the overall sensitivity, an approach of using sensor arrays was utilized. A dynamic selection of the multiple sensors of various sensitivities and working dose ranges was implemented by applying a pattern recognition analysis.

Published in:

Sensors Journal, IEEE  (Volume:6 ,  Issue: 2 )

Date of Publication:

April 2006

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