MnO/TeO2 thin films as optical gamma radiation sensors

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

MnO/TeO₂ thin films as optical gamma radiation sensors

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

University of Limerick
Department of Electronic and Computer Engineering

Research output: Contribution to conference › Paper › 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 mSv. 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	1285-1288
Number of pages	4
Publication status	Published - 2004
Event	IEEE Sensors 2004 - Vienna, Austria Duration: 24 Oct 2004 → 27 Oct 2004

Conference

Conference	IEEE Sensors 2004
Country/Territory	Austria
City	Vienna
Period	24/10/04 → 27/10/04

Keywords

Gamma radiation sensor
MnO/TeO mixtures
Thin films

Cite this

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title = "MnO/TeO2 thin films as optical gamma radiation sensors",

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 mSv. 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, Thin films",

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

year = "2004",

language = "English",

pages = "1285--1288",

note = "IEEE Sensors 2004 ; Conference date: 24-10-2004 Through 27-10-2004",

}

TY - CONF

T1 - MnO/TeO2 thin films as optical gamma radiation sensors

AU - Arshak, Khalil I.

AU - Molloy, Jonathan

AU - Korostynska, Olga

AU - Harris, John

PY - 2004

Y1 - 2004

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 mSv. 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 mSv. 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 - Thin films

UR - https://www.scopus.com/pages/publications/27944475601

M3 - Paper

AN - SCOPUS:27944475601

SP - 1285

EP - 1288

T2 - IEEE Sensors 2004

Y2 - 24 October 2004 through 27 October 2004

ER -

MnO/TeO₂ thin films as optical gamma radiation sensors

Abstract

Conference

Keywords

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