Effect of additives: organic-metal oxide nanocomposites for γ-ray sensors
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N. B. Singh, N. B. Singh, Ching Hua Su, Ching Hua Su, Bradley Arnold, Bradley Arnold, Fow-Sen Choa, Fow-Sen Choa, Christopher Cooper, Christopher Cooper, Stacey Sova, Stacey Sova, Puneet Gill, Puneet Gill, Vishall Dayal, Vishall Dayal, Lisa Kelly, Lisa Kelly, Narasimha Prasad, Narasimha Prasad, Paul Smith, Paul Smith, Brian Cullum, Brian Cullum, "Effect of additives: organic-metal oxide nanocomposites for γ-ray sensors", Proc. SPIE 10629, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XIX, 106290D (23 May 2018); doi: 10.1117/12.2301084;
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Copyright (2018) Society of Photo-Optical Instrumentation Engineers (SPIE). One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
Copyright (2018) Society of Photo-Optical Instrumentation Engineers (SPIE). One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
Abstract
The transition metal oxide embodied organic composites have great promise for high energy radiation detection. The
interaction of high energy radiation such as γ-rays with the organic composite can generate photoelectric responses,
Compton scattering and electron hole pairs, which can provide favorable properties to enhance the radiation
detectivity of the composite. These effects along with changes of oxidation state of metal oxides, provide significant
change in the electrical characteristics of composites due to radiation exposure. We have developed nickel oxide
(NiO₂) nanoparticles embodied urea composite (urea-NiO₂), and determined effect of γ-radiation on the current –
voltage characteristics in the frequency range of 100 Hz to 100,000Hz. In this paper, we describe the results of effect
of additional oxidizing agent MnO₂ (urea-NiO₂-MnO₂) on the morphology, processing and current voltage
characteristics due to exposure of Cs-137 γ-radiation. It was observed that addition of MnO₂ in urea-NiO₂
composite decreases the sensitivity of detection. However, urea-NiO₂-MnO₂ composite recovers to original
properties after irradiation much faster than urea-NiO₂ composite.