A5028320157- Medical Imaging Techniques and Applications
- Particle physics theoretical and experimental studies
- Radiation Detection and Scintillator Technologies
- Atomic and Subatomic Physics Research
- Quantum Chromodynamics and Particle Interactions
- Nuclear Physics and Applications
- Radiopharmaceutical Chemistry and Applications
- bioluminescence and chemiluminescence research
- High-Energy Particle Collisions Research
- Muon and positron interactions and applications
- Particle Detector Development and Performance
- Advanced MRI Techniques and Applications
- Advanced Radiotherapy Techniques
- Neutrino Physics Research
- Nuclear reactor physics and engineering
- Cancer, Hypoxia, and Metabolism
- Superconducting Materials and Applications
- Optical Imaging and Spectroscopy Techniques
- Neurogenesis and neuroplasticity mechanisms
- Thermoregulation and physiological responses
- Satellite Communication Systems
- Photoreceptor and optogenetics research
- Photoacoustic and Ultrasonic Imaging
- Thyroid Cancer Diagnosis and Treatment
- Ultrasound and Hyperthermia Applications
Uppsala University
2022
D&S Consultants (United States)
2011
Eaton (United States)
2011
William & Mary
1994-2008
Williams (United States)
1994-2008
Thomas Jefferson National Accelerator Facility
2006
University of California, Irvine
1989
Catholic University of America
1970
Pennsylvania State University
1961
The most sensitive experiment to date search for the muon and electron lepton number violating decay ${K}_{L}^{0}\ensuremath{\rightarrow}{\ensuremath{\mu}}^{\ifmmode\pm\else\textpm\fi{}}{e}^{\ensuremath{\mp}}$ has detected no events consistent with this process. Based on result, $90%$ confidence level upper limit branching fraction is...
The Detector Group at the Thomas Jefferson National Accelerator Facility (Jefferson Lab) and Biology, Physics, Applied Sciences Departments College of William Mary are collaborating on development a miniature dual modality SPECT-CT system for mouse imaging. detector heads SPECT sub-system designed to be capable imaging gamma- X-ray emissions (28-35 keV) radioactive isotope iodine-125 (I-125). Two different sets I-125 detectors configured gantry that has an open-barrel type design. One set is...
The branching ratio relative to ordinary muon capture and the photon asymmetry muon-spin direction were measured for radiative in $^{40}\mathrm{Ca}$. For ~ 1200 events, partial is ${R}_{k>57 \mathrm{MeV}}=(21.1\ifmmode\pm\else\textpm\fi{}1.4)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}6}$, $k>63.5$ MeV +0.90\ifmmode\pm\else\textpm\fi{}0.50. A fit of spectrum theory Rood, Yano, Yano gives value ${{g}_{P}}^{\ensuremath{\mu}}=(6.5\ifmmode\pm\else\textpm\fi{}1.6){g}_{A}$...
A search for the decay ${\mathit{K}}_{\mathit{L}}^{0}$\ensuremath{\rightarrow}${\mathrm{\ensuremath{\mu}}}^{\ifmmode\pm\else\textpm\fi{}}$${\mathit{e}}^{\ensuremath{\mp}}$ with significantly increased experimental sensitivity has yielded no events. The 90% confidence level limit on branching ratio is...
Monoenergetic $\ensuremath{\gamma}$ rays produced when neutrons are captured in various materials have been used to study the following reactions: ${\mathrm{Ta}}^{181}(\ensuremath{\gamma}, n){\mathrm{Ta}}^{180m}(8.15 \mathrm{hr})$, ${\mathrm{Au}}^{197}(\ensuremath{\gamma}, n){\mathrm{Au}}^{196}(5.6 \mathrm{days})$, ${\mathrm{Ho}}^{165}(\ensuremath{\gamma}, n){\mathrm{Ho}}^{164}(34 min)$, ${\mathrm{Ag}}^{107}(\ensuremath{\gamma}, n){\mathrm{Ag}}^{106}(24 and...
Positive pions were stopped in a water Cherenkov counter and the time distribution of positrons from ${\ensuremath{\pi}}^{+}\ensuremath{\rightarrow}{\ensuremath{\mu}}^{+}\ensuremath{\rightarrow}{e}^{+}$ was measured. The ${\ensuremath{\mu}}^{+}$ mean life obtained, 2.196 95\ifmmode\pm\else\textpm\fi{}0.000 06 \ensuremath{\mu}s, is slightly less than previous results.
A compact detector, sized particularly for imaging a mouse, is described.The active area of the detector approximately 46 mm 96 mm.Two flat-panel Hamamatsu H8500 position-sensitive photomultiplier tubes (PSPMTs) are coupled to pixellated NaI(Tl) scintillator which views animal through copper-beryllium (CuBe) parallel-hole collimator specially designed 125 I.Although PSPMTs have insensitive areas at their edges and there physical gap, corrections scintillation light collection junction...
With a significant increase in experimental sensitivity, we have observed an additional 281 K0L→μμ events after background subtraction of 19±6 events. Normalizing this sample to the simultaneous observation decay K0L→π+π−, obtain branching ratio B(K0L→μμ)=[7.6±0.5(stat)±0.4(syst)]×10−9. Combining these data with our previously published containing 87 yields B(K0L→μμ)=(7.0±0.5)×10−9.Received 28 February 1991DOI:https://doi.org/10.1103/PhysRevD.44.R1©1991 American Physical Society
A search for the decays ${K}_{L}^{0}$\ensuremath{\rightarrow}\ensuremath{\mu}e and ${K}_{L}^{0}$\ensuremath{\rightarrow}ee has produced no examples of either process. When normalized to decay ${K}_{L}^{0}$\ensuremath{\rightarrow}${\ensuremath{\pi}}^{+}$${\ensuremath{\pi}}^{\mathrm{\ensuremath{-}}}$, 90%-C.L. upper limits on branching ratios are B(${K}_{L}^{0}$\ensuremath{\rightarrow}\ensuremath{\mu}e)2.2\ifmmode\times\else\texttimes\fi{}${10}^{\mathrm{\ensuremath{-}}10}$...
The protection of the thyroid against radioiodine uptake has been an important safety concern for decades. After several studies examined potassium iodide blockade efficacy in 1960's and 1970's, a standard dosage was prescribed by both World Health Organization U.S. Food Drug Administration. In this paper, we tested effectiveness scaled version that comparison to higher doses mice. A novel gamma camera employed with high spatial resolution precisely quantifying activity within field view...
Abstract In the spinal cord, sensory‐motor circuits controlling motor activity are situated in dorso–ventral interface. The neurons identified by expression of transcription factor Doublesex and mab‐3 related 3 (Dmrt3) have previously been associated with coordination locomotion horses ( Equus caballus , Linnaeus, 1758), mice Mus musculus zebrafish Danio rerio F. Hamilton, 1822). Based on earlier studies, we hypothesized that, mice, these may be positioned to receive sensory central inputs...
We have developed an economical dual-modality nuclear imaging system comprised of two Hamamatsu 125 mm diameter position sensitive photomultiplier tubes (PSPMT) viewing pixelated scintillators and a small fluoroscopic X-ray (Lixi, Inc.). Collimators placed between the animal can be readily interchanged include CuBe parallel-hole collimators with range resolution/sensitivity combinations as well brass pinhole various diameters. The fluoroscope provides 5 cm images, several which combined to...
We designed a gasscintillation proportional detector (GSPD) with diameter of 7 cm for the detection X-rays in energy range 5 to 16 keV. First results are presented, including some from test experiments at LEAR, CERN. An resolution 9% has been obtained 6 For timing pre-scintillation can be used.
The authors have developed a multimodality system for imaging the biodistribution of biologically interesting ligands tagged with /sup 125/I. By incorporating small fluoroscope as an additional modality, they enhanced their animal nuclear to include both X-rays and images from two Hamamatsu R3292 5" diameter position sensitive photomultiplier tubes (PSPMT) viewing pixelated scintillators image co-registration 1.5 mm or better. Collimators placed between can easily be interchanged CuBe...
This paper addresses the Network Operations (NetOps) challenges faced when commercial wireless technologies such as 3G/4G are brought to tactical theater. Architectural solutions with Security and Information Assurance requirements have been presented in literature through "generations" of cellular technology (i.e., 3G, 4G, or LTE - Long Term Evolution). One can see that a forward looking view this is quite consistent approach DoD moving towards: seamless IP. WIN-T spiral 3 expected these...
A compact detector, sized particularly for imaging a mouse, is described. The active area of the detector approximately 48 mm x 96 mm. Two flat-panel Hamamatsu H8500 position sensitive photomultiplier tubes (PSPMT) are coupled to pixellated NaI(Tl) scintillator which views animal through copper-beryllium (CuBe) parallel-hole collimator. Because PSPMTs have insensitive areas at their edges, particular care has been given bridging gap where two join so as maintain uniform response across...
A prototype muon polarimeter was built to study the feasibility of measuring positive polarization in decay K/sub L/ mu /sup +/ -/. The system consisted alternating layers extruded-aluminum gas proportional tubes and polarization-retaining absorber plates either aluminum or marble. Longitudinally polarized muons from stopped channel at LAMPF were where they precessed a field 60 G. Decay times recorded 100-ns first-in-first-out memories for all wires hit during 12.8- s period centered about...
A small-animal imaging system suitable for SPECT and multipinhole standard/helical has been designed constructed. Copper-beryllium parallel-hole collimators the ~35 keV photons from decay of <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">125</sup> I have built installed to achieve better spatial resolution reduce time on our dual-detector array. To further address limitations in sensitivity limited field view single-pinhole SPECT, we...
A rotating cylindrical gantry apparatus holding a pair of Hamamatsu R3292 position sensitive photomultiplier tubes (PSPMTs), each which can include either parallel-hole collimator or pinhole collimator, has been used to gather planar images and single photon emission computer tomography (SPECT) data an entire mouse. In addition, in number experiments magnified view specific organ was obtained with collimation. The scintillators were pixelated NaI(Tl) CsI(Tl) pixels 1/spl times/1/spl times/3...
In a search for the decay ${\mathit{K}}_{\mathit{L}}^{0}$\ensuremath{\rightarrow}${\mathit{e}}^{+}$${\mathit{e}}^{\mathrm{\ensuremath{-}}}$, no candidates have been observed. We determine sensitivity from detected number of CP-violating ${\mathit{K}}_{\mathit{L}}^{0}$\ensuremath{\rightarrow}${\mathrm{\ensuremath{\pi}}}^{+}$${\mathrm{\ensuremath{\pi}}}^{\mathrm{\ensuremath{-}}}$ decays and place 90% confidence level upper limit on branching ratio...