Graduate Thesis Or Dissertation
 

A Rapid β-/γ Autoradiographic Imaging Method for Post-detonation Nuclear Forensics and Radiological Emergency Response

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https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/5425kj54w

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  • In a radiological emergency scenario, the capability to rapidly visualize radiation emitted from debris, contamination, or absorbed in biological samples, while visualizing the non-radioactive (or “conventional” image) features within a field of view, will provide critical information to support optimization of further analysis, sample collection, and decision making. This research developed and assessed a novel autoradiographic method based on electron multiplying charge couple device (EMCCD) sensor and inorganic scintillator-based method as a faster, cheaper, and more portable alternative to traditional autoradiographic imaging technology. A series of known activity calibration sources and spheroid surrogate nuclear debris particulate on the micro- to millimeter scale were studied to determine the optimal imaging parameters and experimental setup to provide the highest quality autoradiographic images. Both autoradiographic and non-radioactive features could be distinguished from a single, rapid exposure in these experiments. The autoradiographic method was tested with samples of surrogate nuclear debris particles (0.750-1.35 mm in diameter) for exposure times of ≤3000 seconds (50 minutes). Various reflectors for emitted light were tested within the experimental setup to assess potential improvements in exposure time, spatial resolution, and signal-to-noise ratio (SNR) of the captured images.
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  • Pending Publication
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  • 2021-07-26 to 2022-08-27

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file details FoleyAriA2021.pdf 2021-07-26 Público Baixar