Dr. Daniel S. Hussey Profile

Dr. Daniel S. Hussey

at National Institute of Standards and Technology

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Author

Publications (4)

Proceedings Article | 14 September 2020 Presentation + Paper

NIST NeXT: a system for truly simultaneous neutron and x-ray tomography

J. LaManna, D. Hussey, V. DiStefano, E. Baltic, D. Jacobson

Proceedings Volume 11494, 114940P (2020) https://doi.org/10.1117/12.2569666

KEYWORDS: X-rays, Tomography, Excel, Solids, CMOS sensors, Nondestructive evaluation, Materials science, Hydrogen, Microfluidics, Water

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Proceedings Article | 17 September 2019 Presentation

Analysis algorithms for simultaneous neutron and x-ray tomography datasets from the NIST NeXT system (Conference Presentation)

Jacob LaManna, Daniel Hussey, Eli Baltic, David Jacobson

Proceedings Volume 11113, 111131C (2019) https://doi.org/10.1117/12.2529596

KEYWORDS: X-rays, Tomography, Reconstruction algorithms, X-ray characterization, Nondestructive evaluation, Complex systems, Stochastic processes, Analytical research, Image segmentation, Algorithm development

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Proceedings Article | 25 September 2017 Presentation + Paper

Improving material identification by combining x-ray and neutron tomography

Jacob LaManna, Daniel Hussey, Eli Baltic, David Jacobson

Proceedings Volume 10391, 1039104 (2017) https://doi.org/10.1117/12.2274443

KEYWORDS: X-rays, Tomography, Lithium, X-ray imaging, Signal attenuation, Nondestructive evaluation, Volume rendering, Radiography

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Proceedings Article | 13 May 2015 Paper

Global nuclear radiation monitoring using plants

Mohammad Islam, Carlos Romero-Talamas, Dan Kostov, Wanpeng Wang, Zhongchi Liu, Daniel Hussey, Eli Baltic, David Jacobson, Jerry Gu, Fow-Sen Choa

Proceedings Volume 9486, 94860S (2015) https://doi.org/10.1117/12.2177532

KEYWORDS: Luminescence, Nuclear radiation, Environmental sensing, Spectroscopy, Gamma radiation, Data modeling, Bismuth, Crystals, Heat flux, Soil contamination

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Publisher’s Note: This paper, originally published on 5/13/2015, was replaced with a corrected/revised version on 7/1/2015. If you downloaded the original PDF but are unable to access the revision, please contact SPIE Digital Library Customer Service for assistance.

Plants exhibit complex responses to changes in environmental conditions such as radiant heat flux, water quality, airborne pollutants, soil contents. We seek to utilize the natural chemical and electrophysiological response of plants to develop novel plant-based sensor networks. Our present work focuses on plant responses to high-energy radiation – with the goal of monitoring natural plant responses for use as benchmarks for detection and dosimetry. For our study, we selected a plants cactus, Arabidopsis, Dwarf mango (pine), Euymus and Azela. We demonstrated that the ratio of Chlorophyll a to Chlorophyll b of the leaves has changed due to the exposure gradually come back to the normal stage after the radiation die.

We used blue laser-induced blue fluorescence-emission spectra to characterize the pigment status of the trees. Upon blue laser excitation (400 nm) leaves show a fluorescence emission in the red spectral region between 650 and 800nm (chlorophyll fluorescence with maxima near 690nm and 735 nm). Sample tree subjects were placed at a distance of 1m from NIST-certified 241AmBe neutron source (30 mCi), capable of producing a neutron field of about 13 mrem/h. This corresponds to an actual absorbed dose of ~ 1 mrad/h.

Our results shows that all plants are sensitive to nuclear radiation and some take longer time to recover and take less. We can use their characteristics to do differential detection and extract nuclear activity information out of measurement results avoid false alarms produced environmental changes. Certainly the ultimate verification can be obtained from genetic information, which only need to be done when we have seen noticeable changes on plant optical spectra, mechanical strength and electrical characteristics.

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