Some of the material in is restricted to members of the community. By logging in, you may be able to gain additional access to certain collections or items. If you have questions about access or logging in, please use the form on the Contact Page.
Some of the material in is restricted to members of the community. By logging in, you may be able to gain additional access to certain collections or items. If you have questions about access or logging in, please use the form on the Contact Page.
In this dissertation, we introduce a new approach in building a hybrid nuclear model that combines some existing theoretical models and a \universal" approximator. The goal of such an approach is to obtain new predictions of nuclear...
With growing interest in devices that utilize the spin degree of freedom of the charge carriers, there is an extensive research effort into materials with high spin polarization. Two types of materials that have attracted particular...
Results are reported of a search for a deviation in the jet production cross section from the prediction of perturbative quantum chromodynamics at next-to-leading order. The search is conducted using a 7 TeV proton-proton data sample...
Complex physical phenomena, such as superconductivity, colossal magnetoresistance (CMR) effect, multi-ferroics, metal-insulator transition, quantum phase transition, etc. in strongly correlated materials have been enduring topics in...
Precise knowledge of parton distribution functions (PDFs) is necessary to the accurate calculation of QCD observables initiated by hadrons. The deep inelastic scattering (DIS) and lepton pair production (LPP) processes are primary...
The semileptonic decays of heavy baryons, ΛQ and ΩQ are treated in the framework of a constituent quark model. Both nonrelativistic and semirelativistic Hamiltonians are used to obtain the baryon wave functions from a fit to the spectra, ...
Disorder can have a vast variety of consequences for the physics of phase transitions. Some transitions remain unchanged in the presence of disorder while others are completely destroyed. In this dissertation we study the effects of...
The mechanism by which muscle generates force has been the subject of considerable study. Key to our understanding of this mechanism is the conformational changes occurring in the myosin "head" as it interacts with the thin filament....
Electrophoresis is one of the most powerful tools used to separate biological molecules by size in a supporting medium under the influence of an electric field. Pluronic F127 gel, introduced as a new sieving medium for electrophoresis in...
Organic systems provide the opportunity to study physics in lower dimensions. Rather than interactions between atomic sites, organic systems are comprised of molecules with the general shape of flat bricks. The stacking of these bricks...
Several multiband models for Colossal Manetoresistance Materials and Diluted Magnetic Semiconductors are investigated within Dynamical Mean-Field Theory. The theoretical analysis of such models uses extensively the parametrization method...
The study of the deconfining phase transition or crossover is important for the understanding of properties of nuclear matter and the quark gluon plasma. Heavy ion collisions experiments are capable of creating conditions necessary for...
Precise Measurements of the Atomic Masses of ²⁸Si, ³¹P, ³²S, ⁸⁴,⁸⁶Kr, ¹²⁹,¹³²,¹³⁶Xe, and the Dipole Moment of Ph⁺ Using Single-Ion and Two-Ion Penning Trap Techniques
This dissertation describes high precision measurements of atomic masses by measuring the cyclotron frequency of ions trapped singly, or in pairs, in a precision, cryogenic Penning trap. By building on techniques developed at MIT for...
The use of single nucleon and two-like nucleon knockout reactions of medium to heavy mass exotic beams on light targets has proven an invaluable tool in exploring nuclear properties away from the valley of β-stability up to the proton...
The tremendous interest in using the spin degree of freedom in electronic devices has led to an extensive endeavor to investigate the intrinsic spin polarization of various magnetic materials. The work done here expands upon existing...
We report the synthesis and characterization for two single crystalline lanthenide-host compound Sm$_{6}$T$_{4}$Al$_{43}$ (T = Mo and W), that form in the hexagonal Ho$_{6}$Mo$_{4}$Al$_{43}$ prototype. The Sm ions reside within T/Al...
Understanding Type Ia Supernovae provides an opportunity to study a wide range of modern physics as well as develop a key tool in cosmology. Here, we identify and investigate new observational signatures of underlying physical processes...
Low-spin states were studied in 30Al following the β decay of 30Mg produced in the fragmentation of 140 MeV/AMU 48Ca. Analysis of the β-γ and β-γ-γ coincidences revealed a new 1+ state at 2413 keV, confirmation of the level scheme, and a...
It is always very nice when a new discovery found in an old material. The spinel vanadate has become one of the hot topics in the condensed matter physics both experimentally and theoretically. It shows many interesting behaviors due to...
The understanding of magnetic materials has become crucial to both fundamental physics and technological advancement. Particularly, the interplay between magnetic and electronic properties has given rise to such novel physics as high...
Experimental results on the nuclear structure of 44S and 26Si will be reported in this thesis. 44S is studied because of its interest in understanding how nuclei behave far from stability. 26Si is studied because of the impact of...
It is demonstrated that inflatable structures can provide large amounts of stiffness compared to traditional structures of the same mass. A variety of inflatable structures are investigated theoretically. A pressurized lobed cylindrical...
The Standard Model (SM) of particle physics offers the most complete quantum description of the known universe to date, however is unable to address some still unanswered questions. Supersymmetry (SUSY) is a theory which proposes partner...
We explore the symmetries and systematics of the mass spectrum of hadrons with two heavy quarks. We also apply these symmetries to the strong decays of baryons with two heavy quarks. We explore the ramifications of a proposed symmetry...
Supersymmetric grand unified models based on the SO(10) gauge group are especially attractive in light of recent data on neutrino masses. The simplest SO(10) SUSY GUT models predict unification of third generation Yukawa couplings (t –b ...
The identities of the progenitors of type Ia supernova (SN Ia) has long been under study and remains an unsolved problem of astrophysics. The answer to this question will impact cosmology and subfields such as galactic evolution. To help...
This dissertation examines the observability of neutralino dark matter in the context of supersymmetric models constrained constrained by the recent WMAP data on the relic density of cold dark matter. The neutralino-nucleon scattering...
The gas within dark matter halos of galaxies and clusters contains information about the baryon content of the universe that is not found anywhere else. Precise understanding of the nuances of this gas is critical to understanding the...
We study several aspects of the behavior of strongly correlated electron systems with disorder. First we examine the influence of strong electron-electron interactions on the impurity dominated resistivity. In the weak-coupling limit, ...
Recent experiments carried out at the Relativistic Heavy Ion Collider at the Brookhaven National Laboratory provide strong evidence that a matter can be driven from a confined, low-temperature phase, observed in our every day world into...
Edge magnetoplasmons (EMPs) and pinning mode resonances in two dimensional electron systems (2DESs) can both be thought of as lower hybrid modes of cyclotron and plasma resonances. This dissertation describes low temperature microwave...
The polymerization of acrylamide monomers in the presence of surfactant selfassemblies produces gels with variable pore architecture. Polyacrylamide gels were formed by polymerizing acrylamide plus a cross-linker in the presence of...
A quantum computer must be capable of manipulating quantum information while at the same time protecting it from error and loss of quantum coherence due to interactions with the environment. Topological quantum computation (TQC) offers a...
Hadronic form factors for semileptonic decay of the Λ[subscript c] are calculated in a nonrelativistic quark model. The full quark model wave functions are employed to numerically calculate the form factors to all orders in (1/m...
Elemental chromium is an itinerant, antiferromagnet with an incommensurate spin and charge density wave structure below 311 kelvin. The Fermi surface in this state is a direct result of the three dimensional nesting of large portions of...
Observations indicate that massive stars ends their lives violently, but exactly how massive they need to be remains an astrophysical challenge. Stellar evolution predicts make two fundamental predictions about the fate of massive stars....
Detailed Spectroscopic Study of the High-Spin Structures in ¹⁶⁸,¹⁶⁹,¹⁷⁰,¹⁷¹W and ¹⁹⁶Hg and a Systematic Examination of Nuclear Structure Behavior of Rare-Earth Isotopes in the A≈160−180 Region
High-spin states in the rare-earth nuclei $^{168, 169, 170, 171}$W (Z=74) were produced via fusion evaporation reactions carried out at Argonne National Laboratory (ANL) using the Argonne Tandem Linear Accelerator System (ATLAS). An...
We have developed a method for rapid, massively-parallel assembly and alignment of single walled carbon nanotubes (SWCNT) on a solid-state substrate. The results opened the possibility of production of SWCNT-based integrated circuits. In...
Several materials have been investigated in order to study charge and spin processes in anisotropic materials, particularly in high magnetic fields. The behavior of charge carriers in graphite based material, such as bulk graphite, ...
Measurement of Polarization Observables in γ[over rightarrow]p[over rightarrow] → pπ⁺π⁻ Using Circular Beam and Longitudinal Target Polarization and the CLAS Spectrometer at Jefferson Laboratory
The study of baryon resonances offers a deeper understanding of the strong interaction, since the dynamics and relevant degrees of freedom hidden within them are reflected by the properties of the excited states of baryons. Higher-lying...
This dissertation encompasses my major experimental work using nuclear magnetic resonance (NMR) to probe the local magnetism and spin dynamics of two interesting systems in condensed matter: density wave and frustrated spin systems....
This dissertation is a theoretical and computational examination of electronic properties of topological materials, such as topological insulators and Weyl semimetals. Our work is motivated by various experimental observations and...
Apart from the mesons that the constituent quark model predicts, QCD allows for additional states beyond the quark-antiquark system. Previous experiments have performed partial wave analysis on pion-production data and claim observation...
We present the results of our numerical studies on the transport properties of strongly correlated nanostructures, particularly quantum dots and single molecules. The main focus is on correlation, interference and phononic effects....
The purpose of this dissertation is to study different properties of the transition metal oxides, especially the high-Tc superconductors. Applying Monte Carlo methods to a Spin- Fermion model, the behavior of the band structure, Fermi...
The Bardeen-Cooper-Schrieffer (BCS) theory of superconductivity is one of the jewels of 20th century physics. In this theory, the superconducting state of a metal is understood in terms of the formation of electron pairs which condense...
An inverse kinematic proton scattering experiment was performed at the National Superconducting Cyclotron Laboratory (NSCL) using the GRETINA-S800 detector system in conjunction with the Ursinus College liquid hydrogen target. $\gamma$...
The exploration and understanding of new states of matter resulting from reduced dimensionality and electron correlations has been at the forefront of condensed matter physics research for decades. The goal of this dissertation is to...
There is an ongoing interest in studying the novel magnetic systems, such as magnetoresistance structures (GMR), magnetic dilute semiconductors and various magnetic nanostructures. In the first part of my dissertation I present the...
A quantum computer is a proposed device which would be capable of initializing, coherently manipulating, and measuring quantum states with sufficient accuracy to carry out new kinds of computations. In the standard scenario, a quantum...
Some of the material in is restricted to members of the community. By logging in, you may be able to gain additional access to certain collections or items. If you have questions about access or logging in, please use the form on the Contact Page.
