Nanocomposites for low dose gamma-ray sensor: Effect of matrix and oxidizer on the performance
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2019-05-14
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Dayal, Vishall; Singh, Narsingh Bahadur; Su, Ching Hua; Gill, Puneet; Lee, Brit; Choa, Fow-Sen; Arnold, Bradley; Kelly, Lisa; Cullum, Brian; Nanocomposites for low dose gamma-ray sensor: Effect of matrix and oxidizer on the performance (Conference Presentation); Proceedings Volume 11010, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XX; https://www.spiedigitallibrary.org/conference-proceedings-of-spie/11010/110100Q/Nanocomposites-for-low-dose-gamma-ray-sensor--Effect-of/10.1117/12.2517435.short?webSyncID=a470c0d8-be74-e081-bd72-a83e91ada982&sessionGUID=a00bdac6-2568-3bb6-383d-d8bb4517e0c5&SSO=1
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This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
Public Domain Mark 1.0
This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
Abstract
Synthesis and crystal growth of scintillators and semiconductor materials for radiation detectors have been proven to be time consuming and very costly. Several alternative crystals such as Tl3ASSe3, TlGaSe2, Tl4HgI6, PbSe(1-x)Ix have developed in our laboratory. These heavy metal and high Z based compounds have shown great promise. We have been working on some innovative approaches based on Cerenkov radiation and nanocomposites of ionizing organics for faster and efficient sensors. By combining some metallic oxides with an organic material, it should be possible to both extend the energy range of particles capable of being detected while also providing more discrimination for high energy gamma-rays, based on local secondary effects in the surrounding organic matrix. We have been working with a highly ionizing organic compound p-chloranil (2,3,5,6-Tetrachloro-1,4-benzoquinone) matrix. In addition, we have determined effect of oxidizing compounds MnO2 on urea-based composites. We use metal oxide as active ingredient in this matrix. We will present effect of morphology and processing on the performance of nanocomposite for sensing gamma-rays.