Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Engineering (7)
- Atomic, Molecular and Optical Physics (5)
- Engineering Physics (2)
- Nanoscience and Nanotechnology (2)
- Nuclear (2)
-
- Quantum Physics (2)
- Biological and Chemical Physics (1)
- Chemistry (1)
- Civil and Environmental Engineering (1)
- Condensed Matter Physics (1)
- Earth Sciences (1)
- Electrical and Computer Engineering (1)
- Environmental Sciences (1)
- Fluid Dynamics (1)
- Geophysics and Seismology (1)
- Materials Science and Engineering (1)
- Mineral Physics (1)
- Nuclear Engineering (1)
- Oil, Gas, and Energy (1)
- Keyword
-
- Atomic clocks; Time measurements (1)
- Atoms; Rubidium; Quantum computers (1)
- Buckling (Mechanics); Deformations (Mechanics); Nanotubes (1)
- Buckminsterfullerene – Therapeutic use; Nanomedicine; Nanostructured materials – Therapeutic use; Nanostructures (1)
- Carbon compounds; Nanotubes – Properties (1)
-
- Chemical reactions; Diffusion coatings; Nuclear fuels; Palladium; Zirconium carbide (1)
- Chemical structure; Crystallography; Oxides; Radioactive waste repositories (1)
- Cobalt compounds —Electric properties; Cobalt compounds —Thermal properties; Phase transformations (Statistical physics); Transition metal compoundsf (1)
- Deformation potential; Olivine; Plasticity; Rock deformation (1)
- Graphene (1)
- High pressure (Science); Hydrogen – Research; Nitrogen compounds; Scission (Chemistry); Sodium borohydride; X-rays — Diffraction (1)
- High pressure (Science); Hydrostatics (1)
Articles 1 - 12 of 12
Full-Text Articles in Physics
Structure Studies On Lanthanide Technetium Pyrochlores As Prospective Host Phases To Immobilize 99- Technetium And Fission Lanthanides From Effluents Of Reprocessed Used Nuclear Fuels, Thomas Hartmann, Ariana Alaniz
Structure Studies On Lanthanide Technetium Pyrochlores As Prospective Host Phases To Immobilize 99- Technetium And Fission Lanthanides From Effluents Of Reprocessed Used Nuclear Fuels, Thomas Hartmann, Ariana Alaniz
Festival of Communities: UG Symposium (Posters)
We performed a systematic investigation of the incorporation of 99Tc into pyrochlore oxide structures, Ln2Tc2O7, where Ln represents trivalent lanthanide Ln3+ cations, while 99Tc is atetravalent, Tc4+, metal cation. Pyrochlore compounds are high-melting temperature oxides and are recognized for their durability. Our goal in this preliminary study is to characterize and quantify the range of stability of the lanthanum technetium pyrochlore oxide phase. Hereby, powder X-ray diffraction (XRD) and Rietveld analysis were used to determine and characterize the crystalline phase content with high accuracy, and scanning electron microscopy (SEM) was used to characterize the microstructure and homogeneity of the synthesized …
Entangling The Lattice Clock With Rydberg Gates, Frank J. Greenhalgh
Entangling The Lattice Clock With Rydberg Gates, Frank J. Greenhalgh
Festival of Communities: UG Symposium (Posters)
Knowledge of the exact time is critical to many engineers and planetary experts; unfortunately atomic clocks can't have infinite accuracy by Heisenberg's uncertainty principle. To attain accuracy past the limit we have achieved today, we will design a critical improvement of the atomic clock via the Rydberg gates method. Rydberg gates synchronize the atomic states so that they are more sensitive which will greatly increase the accuracy. This project will introduce fast acting Rydberg gates to an existing atomic clock layout. The Rydberg gates will allow the clock to entangle atoms in less time, thus decreasing decoherence effects on the …
Oral Presentation: Next Generation Nuclear Fuels, Douglas Hanks
Oral Presentation: Next Generation Nuclear Fuels, Douglas Hanks
Festival of Communities: UG Symposium (Posters)
Zirconium carbide has been proposed as a coating layer for next generation (“TRISO”) nuclear fuel, and is intended as a diffusion barrier to contain fission products (e.g., Pd). To study the chemical interaction between Pd and ZrC, their interface was investigated using X-ray Photoelectron Spectroscopy (XPS). Pd was step-wise deposited onto ZrC in ultra-high vacuum, and the chemical interaction at the interface was monitored, also as a function of temperature (up to 1000 C). In the presentation, details of the chemical interaction and changes in the chemical environment of Pd and their relevance for TRISO fuel will be discussed.
Aspect Ratio Dependent Buckling Mode Transition In Single-Walled Carbon Nanotubes Under Compression, Jeremy Feliciano
Aspect Ratio Dependent Buckling Mode Transition In Single-Walled Carbon Nanotubes Under Compression, Jeremy Feliciano
Festival of Communities: UG Symposium (Posters)
Using molecular dynamics simulations, we study axial compressive behavior of single-walled carbon nanotubes (SWCNTs) with a wide range of aspect ratios (length to diameter ratio). It is shown that the difference in aspect ratio leads to distinct buckling modes in SWCNTs. Small-aspect-ratio SWCNTs primarily exhibit shell buckling; they switch to column buckling mode with increasing aspect ratio. Further compression of the already column buckled large-aspect-ratio SWCNTs results in a shell buckling. This shell buckling mode is distinct from that of small-aspect-ratio SWCNTs in that it originates from the column buckling induced bending deformation.
Elastic Plastic Self Consistent (Epsc) Modeling Of Plastic Deformation In Fayalite Olivine, Christopher J. Cline Ii, Pamela Burnley
Elastic Plastic Self Consistent (Epsc) Modeling Of Plastic Deformation In Fayalite Olivine, Christopher J. Cline Ii, Pamela Burnley
Festival of Communities: UG Symposium (Posters)
We are using an Elastic Plastic Self Consistent Model (a type of numerical simulation) to study deformation of olivine. Olivine is one of the major constituents of the Earth’s upper mantle and its deformation properties have an important influence on how the Earth’s crust deforms. For example, the flow strength of olivine limits the size of the largest earthquakes and the heights of the tallest mountains on Earth. By comparing the results of our simulations with data from olivine deformation experiments we are able to better interpret the experimental data.
Hipsec X-Ray Diffraction And Infrared Spectroscopy Studies On Energetic Materials Under Extreme Conditions, Mai Huong Bausch, Yu Liu
Hipsec X-Ray Diffraction And Infrared Spectroscopy Studies On Energetic Materials Under Extreme Conditions, Mai Huong Bausch, Yu Liu
Festival of Communities: UG Symposium (Posters)
We conducted a series of experiments on the decompositions of the energetic materials NaBH4, NH3BH3, HMX, and RDX under different pressures using the x-ray diffraction (XRD) technique; we also studied the lesser known but high-performance explosive FOX-7’s behaviors under high pressures using the infrared spectroscopy (IR) technique. For the chemical decomposition of NaBH4 and NH3BH3 we discovered possible x-ray induced hydrogen gas generation; for the decomposition of HMX and RDX, we discovered that the decay rates of these two materials vary with pressure respectively; for the study of FOX-7’s high pressure behaviors we discovered potential phase changes and pressure induced …
High Pressure – Variable Temperature Studies On Pressure Transmitting Media, Vahe Mkrtchyan, Jason Baker, Matthew K. Jacobsen, Ravhi S. Kumar, Andrew Cornelius
High Pressure – Variable Temperature Studies On Pressure Transmitting Media, Vahe Mkrtchyan, Jason Baker, Matthew K. Jacobsen, Ravhi S. Kumar, Andrew Cornelius
Festival of Communities: UG Symposium (Posters)
The pressure transmitting medium is an important element in high pressure physics. A variety of pressure transmitting media exist including Silicone fluid, Daphne Oil, 4:1 Methanol:Ethanol mixture, etc. In this experiment, the hydrostatic limits of pressure transmitting media have been observed at low temperatures and high pressures. In this case, 4:1 Methanol: Ethanol has been used. The hydrostaticity of 4:1 Methanol:Ethanol has been well studied at room temperatures using the fluorescence of ruby by fitting the R1 and R2 lines to Pseudo-Voigt functions. The hydrostacity of the pressure medium was determined by analyzing the full width at half max (FWHM) …
“Magic” Trapping Of Rydberg States For Quantum Information, Muir Morrison, Andrei Derevianko
“Magic” Trapping Of Rydberg States For Quantum Information, Muir Morrison, Andrei Derevianko
Festival of Communities: UG Symposium (Posters)
Recent experiments using neutral atoms to manipulate quantum information show promise for constructing a large-scale, practical quantum computer. Achieving such a quantum computer will require less destructive optical traps for the atoms. Using theoretical and computational tools, we consider the feasibility of one possible “magic” trap for rubidium. Preliminary results suggest such trapping may be possible, but more accurate calculations are necessary to reach definitive conclusion.
X-Ray Diffraction On The Thermoelectric Silicides At High Pressure, Deep Patel, Ravhi S. Kumar, Andrew Cornelius
X-Ray Diffraction On The Thermoelectric Silicides At High Pressure, Deep Patel, Ravhi S. Kumar, Andrew Cornelius
Festival of Communities: UG Symposium (Posters)
Cobalt Silicide (CoSi2) is a transition metal disilicide that has gathered scientific interest due to its interesting thermoelectric properties and applications in silicon-based devices because of their high temperature stability. It has been reported that CoSi2 undergoes a phase transition at around 0.4 GPa and again at 13 GPa. Furthermore, at 13 GPa the material changes from a cubic cell to an orthorhombic cell, but details of the phase transition at 0.4 GPa could not be determined. To further study the properties of CoSi2 and understand its pressure induced phase changes, we recorded the structural behavior of CoSi2 under pressure.
Computational Study Of Carbon Nanotubes Under Strain, Jeremy Feliciano, William Wolfs
Computational Study Of Carbon Nanotubes Under Strain, Jeremy Feliciano, William Wolfs
Festival of Communities: UG Symposium (Posters)
We perform computational studies of carbon nanotubes (CNTs) using molecular dynamics simulations to examine the behavior of single-walled (SW) and multiwalled (MW) CNTs under large compressive and bending strains. We study the effects of defects, heating and chirality on their properties. Research on CNTs holds great promise for developing new advanced materials in applications ranging from high-strength composites to next-generation electronics.
Graphene: Material That Will Change The Future, Jigar Desai, Darryl Reese
Graphene: Material That Will Change The Future, Jigar Desai, Darryl Reese
Festival of Communities: UG Symposium (Posters)
Graphene is the most recent material discovered by scientists and is a star on the horizon of materials science and condensed matter physics. The one atom thick, two dimensional materials is an amazing conductor of electricity. Although graphene was not discovered completely until 2004, it has already revealed potential applications and scientists have begun researching ways of developing graphene products for the market. Only two products have been successfully produced so far, but scientists have encountered amazing results. This material has many potential applications in the real world and is about to change the future in a positive way.
Investigation Of Structural And Magnetic Properties Of Iron Clusters Encapsulated In Carbon, Andrew Mohrland, Eunja Kim, Phillipe Weck, Pang Tao, Kenneth Czerwinski
Investigation Of Structural And Magnetic Properties Of Iron Clusters Encapsulated In Carbon, Andrew Mohrland, Eunja Kim, Phillipe Weck, Pang Tao, Kenneth Czerwinski
Festival of Communities: UG Symposium (Posters)
Our goal is to investigate and predict the properties of iron-carbon nanostructures by performing numerical calculations using the density-functional theory. We are interested in which nanostructures are most stable, and in how they are likely to form. We have a particular interest in the magnetic properties of carbon "buckyballs" containing iron particles. These structures have potential for biomedical application, including use in anti-cancer treatment. Lone iron clusters have potential for use as a catalyst designed to reduce vehicle emissions.