Optical radiation sensing properties of MnO/TeO2 thin films

Khalil I. Arshak; Olga Korostynska; Jonathan Molloy; John Harris

doi:10.1109/JSEN.2006.874016

Optical radiation sensing properties of MnO/TeO₂ thin films

Khalil I. Arshak
, Olga Korostynska
, Jonathan Molloy
, John Harris

IEEE
University of Limerick
Department of Electronic and Computer Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

This work investigates the effects of γ-rays on the optical properties of pure and mixed-oxide materials, namely MnO and TeO₂, for their possible application as thin film optical gamma radiation sensors. The values of the optical band gap E_opt were obtained in view of the Mott and Davis theory. All samples showed a decrease in E_opt with an increase in radiation dose to a certain level, which was found to be composition dependent. Films with 100 wt.% MnO exhibited the highest sensitivity to low doses of radiation, showing a strong decline in the optical band gap value from 0.64 eV before irradiation to 0.54 eV after a dose of 1.14 mGy. It was experimentally confirmed that both the sensitivity and the working dose range of radiation sensors can be controlled by the composition of the materials used.

Original language	English
Pages (from-to)	656-659
Number of pages	4
Journal	IEEE Sensors Journal
Volume	6
Issue number	3
DOIs	https://doi.org/10.1109/JSEN.2006.874016
Publication status	Published - Jun 2006

Keywords

Gamma radiation sensor
MnO/TeO mixtures
Optical properties
Thin films

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10.1109/JSEN.2006.874016

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title = "Optical radiation sensing properties of MnO/TeO2 thin films",

abstract = "This work investigates the effects of γ-rays on the optical properties of pure and mixed-oxide materials, namely MnO and TeO2, for their possible application as thin film optical gamma radiation sensors. The values of the optical band gap Eopt were obtained in view of the Mott and Davis theory. All samples showed a decrease in Eopt with an increase in radiation dose to a certain level, which was found to be composition dependent. Films with 100 wt.\% MnO exhibited the highest sensitivity to low doses of radiation, showing a strong decline in the optical band gap value from 0.64 eV before irradiation to 0.54 eV after a dose of 1.14 mGy. It was experimentally confirmed that both the sensitivity and the working dose range of radiation sensors can be controlled by the composition of the materials used.",

keywords = "Gamma radiation sensor, MnO/TeO mixtures, Optical properties, Thin films",

author = "Arshak, \{Khalil I.\} and Olga Korostynska and Jonathan Molloy and John Harris",

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T1 - Optical radiation sensing properties of MnO/TeO2 thin films

AU - Arshak, Khalil I.

AU - Korostynska, Olga

AU - Molloy, Jonathan

AU - Harris, John

PY - 2006/6

Y1 - 2006/6

N2 - This work investigates the effects of γ-rays on the optical properties of pure and mixed-oxide materials, namely MnO and TeO2, for their possible application as thin film optical gamma radiation sensors. The values of the optical band gap Eopt were obtained in view of the Mott and Davis theory. All samples showed a decrease in Eopt with an increase in radiation dose to a certain level, which was found to be composition dependent. Films with 100 wt.% MnO exhibited the highest sensitivity to low doses of radiation, showing a strong decline in the optical band gap value from 0.64 eV before irradiation to 0.54 eV after a dose of 1.14 mGy. It was experimentally confirmed that both the sensitivity and the working dose range of radiation sensors can be controlled by the composition of the materials used.

AB - This work investigates the effects of γ-rays on the optical properties of pure and mixed-oxide materials, namely MnO and TeO2, for their possible application as thin film optical gamma radiation sensors. The values of the optical band gap Eopt were obtained in view of the Mott and Davis theory. All samples showed a decrease in Eopt with an increase in radiation dose to a certain level, which was found to be composition dependent. Films with 100 wt.% MnO exhibited the highest sensitivity to low doses of radiation, showing a strong decline in the optical band gap value from 0.64 eV before irradiation to 0.54 eV after a dose of 1.14 mGy. It was experimentally confirmed that both the sensitivity and the working dose range of radiation sensors can be controlled by the composition of the materials used.

KW - Gamma radiation sensor

KW - MnO/TeO mixtures

KW - Optical properties

KW - Thin films

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DO - 10.1109/JSEN.2006.874016

M3 - Article

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SP - 656

EP - 659

JO - IEEE Sensors Journal

JF - IEEE Sensors Journal

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ER -

Optical radiation sensing properties of MnO/TeO₂ thin films

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