A5013880495- Nuclear Physics and Applications
- Radiation Detection and Scintillator Technologies
- Medical Imaging Techniques and Applications
- Advanced X-ray and CT Imaging
- Nuclear reactor physics and engineering
- Graphite, nuclear technology, radiation studies
- Radioactive contamination and transfer
- Radioactivity and Radon Measurements
- Geophysical Methods and Applications
- Particle Detector Development and Performance
- Nuclear and radioactivity studies
- CCD and CMOS Imaging Sensors
- Radiation Dose and Imaging
- Advanced X-ray Imaging Techniques
- Atomic and Subatomic Physics Research
- Advanced Semiconductor Detectors and Materials
- Superconducting Materials and Applications
- Advanced Image and Video Retrieval Techniques
- Atomic and Molecular Physics
- Glioma Diagnosis and Treatment
- Metabolomics and Mass Spectrometry Studies
- Nuclear Materials and Properties
- Calibration and Measurement Techniques
- Spacecraft and Cryogenic Technologies
- Image Processing Techniques and Applications
Pacific Northwest National Laboratory
2015-2024
Battelle
2014-2024
University of Illinois Urbana-Champaign
2019
United States Department of Commerce
2011-2013
National Technical Information Service
2011-2013
Office of Scientific and Technical Information
2011-2013
Idaho National Laboratory
2012-2013
Oak Ridge National Laboratory
2012-2013
Vanderbilt University
2006-2011
University of Canterbury
2009
Differential phase contrast imaging with a grating interferometer is promising new radiographic technique providing three distinct mechanisms-absorption, phase, and scatter (or dark field)-using conventional X-ray tube source. We examine the signatures available in these mechanisms attention towards potential security applications. find that mode uniquely sensitive to textured materials, potentially leading enhanced material discrimination through use of multiple modes. signal our system...
Current radiographic methods are limited in their ability to determine the presence of nuclear materials containers or composite objects. A central problem is inability distinguish attenuation pattern high-density metals from those with a greater thickness less dense material. Here, we show that spectrally sensitive detectors can be used discriminate plutonium multiple layers other using single-view radiograph. An inverse algorithm adaptive regularization used. The simulated radiographs mass...
In this study, LiAlO2 crystals doped with rare-earth elements and Ti were produced by the CZ method spectroscopic neutron detection properties investigated. Photoluminescence revealed no clear luminescent activation of dopants though some interesting luminescence was observed from secondary phases within crystal. Gamma-ray pulse height spectra collected using a 137Cs source exhibited only Compton edge for crystals. Neutron modeling Monte Carlo N-Particle Transport Code most neutrons used in...
The SeaQuest spectrometer at Fermilab was designed to detect oppositely-charged pairs of muons (dimuons) produced by interactions between a 120 GeV proton beam and liquid hydrogen, deuterium solid nuclear targets. primary physics program uses the Drell-Yan process probe antiquark distributions in target nucleon. consists system, two dipole magnets four detector stations. upstream magnet is closed-aperture iron which also serves as dump, while second an open aperture magnet. Each stations...
We previously demonstrated the feasibility of using silicon double-sided strip detectors (DSSDs) for SPECT imaging activity distribution iodine-125 a 300-micrometer thick detector. Based on this experience, we now have developed fully customized DSSDs and associated readout electronics with intent developing multi-pinhole system. Each DSSD has 60.4 mm × active area is 1 thick. The pitch 59 micrometers, 1024 strips each side gives rise to detector over one million pixels. Combining four...
This work presents characterization studies of thick silicon double-sided strip detectors for a high-resolution small-animal SPECT. The dimension these is 60.4 mm × 1 mm. There are 1024 strips on each side that give the coordinates photon interaction, with processed by separate ASIC channel. Our measurement shows intrinsic spatial resolution equivalent to 59 μm pitch attainable. Good trigger uniformity can be achieved proper setting 4-bit DAC in channel remove threshold variations....
We are developing a next-generation unattended sensor that can detect and identify radiation sources while operating on battery power for several weeks. The system achieves smaller size weight over systems use NaI:Tl <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sup> He detectors by using relatively new scintillator, Cs <sub xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> LiYCl xmlns:xlink="http://www.w3.org/1999/xlink">6</sub> :Ce...
X-ray radiography offers the ability to noninvasively inspect internal structure and material composition of objects. Dual-energy allows discrimination but is limited in quantitative measurements due broad nature interrogating x-ray spectrum. Spectral detectors provide an observation not just number x rays that are transmitted through a sample also Here, experimental validations method use spectral accurately quantify uranium mass powder presented. An accurate system response model was...
This work presents characterization studies of thick silicon double-sided strip detectors for a high-resolution small-animal SPECT. The dimension these is 60 mm times 1 mm. There are 1024 strips on each side that give the coordinates photon interaction, with processed by separate ASIC channel. Our measurement shows intrinsic spatial resolution equivalent to 59 mum pitch attainable. Good flood uniformity can be achieved proper setting 4-bit DAC in channel remove trigger threshold variations....
We are developing a next-generation unattended sensor for detecting anomalous radiation sources. The system uses scintillator material with dual sensitivity to gamma rays and neutrons, Cs <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> LiYCl xmlns:xlink="http://www.w3.org/1999/xlink">6</sub> :Ce (CLYC), reduce the size complexity of design. CLYC also offers best-case energy resolution under 4% full width at half maximum 662 keV, allows...