Browsing Physics by Title
Now showing items 120 of 165

A Piezoelectrically Tuned RFCavity Search for Dark Matter Axions
The Axion is a well motivated hypothetical elementary particle that must exist in nature if the strong CP problem of QCD is explained by the spontaneous breaking of a PecceiQuinn symmetry. Not only would the discovery of ... 
A search for hep solar neutrinos at the Sudbury Neutrino Observatory
Solar neutrinos from the fusion hep reaction, (helium3 fusing with a proton to become helium4, releasing a positron and neutrino), have previously remained undetected due to their flux being about one onethousandth that ... 
A Search for Long Lived Neutral Particles Decaying to Hadronic States in ProtonProton Collisions in the ATLAS Detector at sqrt(s) = 8 TeV and sqrt(s) = 13 TeV at the LHC
A search for the decay of a heavy scalar boson into pairs of longlived neutral particles in \intlumi of proton proton collisions at $\sqrt{s}=8$~TeV and $3.2~\rm{fb}^{1}$ at $\sqrt{s}=13$~TeV in the ATLAS detector is ... 
Ab initio calculations of phonon properties and spectra in condensed matter
Phonons, the quantization of atomic vibrations, are important in studying many solid state properties, ranging from Raman, infrared, and neutron scattering to thermal expansion, specific heat, and heat conductivity to ... 
Addressing Beyond Standard Model physics using cosmology
We have consensus models for both particle physics (i.e. standard model) and cosmology (i.e. $\Lambda$CDM). Given certain assumptions about the initial conditions of the universe, the marriage of the standard model (SM) ... 
Adsorption of Noble Gases on Individual Suspended SingleWalled Carbon Nanotubes
(20140224)The focus of this work is a study of the adsorption of noble gases on individual, suspended, singlewalled carbon nanotubes (SWNTs). The surface of a SWNT is a cylindrical cousin of graphite, but the binding energy is ... 
Aluminum Content Tunability of Structural and Optical Properties in WideGap Semiconducting (AlxGa1x)2O3
(AlxGa1x)2O3 alloys have attracted renewed interest due to their potential for use in deepultraviolet optical devices and highpowered transistors, but realization of these technologies depends on the ability to tune the ... 
An image segmentation, lineage and analysis tool for bacteria: Applications in cell proliferation and cytoplasmic dynamics.
Because of the stochastic nature and significant celltocell variation of many biological processes, it is essential to analyze a significant number of cells to understand such processes at the single cell level. Such ... 
An Investigation of Introductory Student Understanding of Special Relativity in the Context of the Relativity of Simultaneity
This dissertation describes the results of an investigation into introductory student understanding of special relativity in the context of the relativity of simultaneity. The research probes the extent to which students ... 
Analysis of slow formation of plasmas in a coaxial double theta pinch
(1993)Plasma formation in a coaxial double theta pinch device is analyzed. This device, called the Coaxial Slow Source (CSS), has demonstrated the formation of annular field reversed configurations on diffusive timescales. Three ... 
Application of abinitio calculations to modeling of nanoscale diffusion and activation in silicon
(2004)As ULSI devices enter the nanoscale, ultrashallow and highly electrically active junctions become necessary. New materials and 3D device structures as well as new process technologies are under exploration to meet the ... 
Applications of Quantum Field Theory, From the Formal to the Phenomenological
Much of the beautiful and complex phenomenology of the Standard Model can be traced back to the presence of chiral symmetries, both global and local, and nonperturbative phenomena. Without chiral symmetries (and the anomalous ... 
Aspects of Chiral Symmetry Breaking in Lattice QCD
In this thesis we describe two studies concerting lattice quantum chromodynamics (LQCD): first, an analysis of the phase structure of Wilson and twistedmass fermions with isospin breaking effects, second a computational ... 
BetheSalpeter Equation Approach for Calculations of Xray Spectra
(20130225)Xray spectroscopy is a powerful and widely used tool for the investigation of the electronic structure of a large variety of solid state materials, including crystals materials, liquids, amorphous solids, molecules, and ... 
Biological nanopore MspA for DNA sequencing
(20130725)Unlocking the information hidden in the human genome provides insight into the inner workings of complex biological systems and can be used to greatly improve healthcare. In order to allow for widespread sequencing, new ... 
Characterization of avalanche photodiode arrays for temporally resolved photon counting
(2004)The Apache Point Observatory Lunar Laserranging Operation (APOLLO) is a nextgeneration campaign aimed at measuring the earthmoon separation with millimeter precision. Doing so requires precision measurements of the ... 
Charge Symmetry Breaking and Nuclear Pion Production Reactions
(201108)Large momentum transfer reactions such as pion production represent the frontier of Chiral Perturbation Theory and must be understood before more complex reactions can be considered. Pion production is also interesting ... 
Chiral perturbation theory on the lattice and its applications
(2004)Chiral perturbation theory (chiPT), the lowenergy effective theory of QCD, can be used to describe QCD observables in the lowenergy region in a modelindependent way. At any given order in the chiral expansion, chiPT ... 
Classical and Quantum Computation in Ground States and Beyond
In this dissertation we study classical and quantum spin systems with applications to the theory of computation. In particular, we examine computational aspects of these systems beyond their ground states by considering ... 
Compton Scattering and Warm Dense Matter Thermometry
(20140224)The purpose of this dissertation is to consider the level of detail required for proper theoretical description of nonresonant inelastic xray scattering (NIXS) experiments from warm dense matter (WDM). These experiments ...