Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 23 for “"Nuclear Interactions"”.
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Experiments to investigate phonon-nuclear interactions
… to test for and investigate a proposed phonon-nuclear coupling interaction and an associated nuclear excitation transfer mechanism. Electric and magnetic interactions of phonons with atomic nuclei have been studied for several decades. However, such second-order interactions are too weak to …
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MRI and NMR Investigations of Transport in Soft Materials and Explorations of Electron-Nuclear Interactions for Liquid-State Dynamic Nuclear Polarization
… (Chapter 5) presents enhancements to dynamic nuclear polarization, an intensity enhancement approach for magnetic resonance techniques. In Chapter 2, I illustrate a characterization method to quantify free polymer chain content in a polymer/DNA complex (polyplex) formulation via …
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Nuclear Computations under Uncertainty New methods to infer and propagate nuclear data uncertainty across Monte Carlo simulations
… new methods to efficiently infer and propagate nuclear data uncertainty across Monte Carlo simulations of nuclear technologies. The main contributions come in two areas: 1. novel statistical methods and machine learning algorithms (Embedded Monte Carlo); 2. new mathematical parametrizations of …
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Probing the Nonperturbative Physics of QCD with Normalizing Flows and a moderate number of Pions
… physics, and the best known theory of strong nuclear interactions. The only known systematically improvable ab-initio method for accessing the nonperturbative physics of QCD is Lattice QCD is, and this thesis presents two advances in our understanding QCD using lattice-based methods. The first …
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Monte Carlo simulation and experimental studies of the production of neutron-rich medical isotopes using a particle accelerator.
The developments of nuclear medicine lead to an increasing demand for the production of radioisotopes with suitable nuclear and chemical properties. Furthermore, from the literature it is evident that the production of radioisotopes using charged-particle accelerators instead of nuclear reactors is …
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Understanding the factors which Influence the interactions of iron (II) and iron (III) in porphyrins and the chemistry of silicon phthalocyanine
… using the same technique. Evidence of the nuclear interactions parameter (quadrupole splitting, ΔEQ) was established for the change in the spin state from high spin to the spin admixed S = +/- 3/2, +/- 5/2 state. Furthermore, high-pressure Mössbauer spectroscopy was shown to be a powerful …
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Nuclear and Chiral transition using the strong coupling expansion of Lattice QCD
In this thesis, we investigate the nuclear and chiral transitions of lattice QCD at large baryon chemical potential, where conventional lattice QCD methods encounter the sign problem. To address this, we utilize the dual representation of lattice QCD obtained via the strong coupling expansion. The …
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Electronic Structure Methods for the Investigation of Nonadiabatic Dynamics
A detailed understanding of the interface between nuclear dynamics and electronic structure is crucial for describing excited state dynamics in photoexcited systems, a key aspect of modelling the efficiency of photovoltaic devices, among other applications. There has been a proliferation of …
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Measurements of Correlated Pair Momentum Distributions in -3He(e,e',p,p)n with CLAS
… (SRC) represent a valuable part of the nuclear wave function. Improved knowledge of SRC will give us a better understanding of nuclear matter and nuclear interactions in extreme conditions. A study of the effects of short-range correlations using the <sup>3</sup>He(<em>e, …
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NMR spectroscopy in the presence of ultrasound and other perturbations
… exploring the potential uses of ultrasound in Nuclear Magnetic Resonance (NMR) spectroscopy, The NMR spectra of liquids provide detailed structural information that may be deduced from the chemical shifts and spin-spin coupling, that are evident in the narrow resonances, arising from some of …
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Computational treatments for neutron resonance elastic scattering in Monte Carlo nuclear simulations
… are vital to the safe design and operation of nuclear reactors. It is therefore important that they accurately treat the physics of nuclear interactions. This work investigates the phenomenon of neutron resonance scattering with a moving target, which can affect the post-collision properties of …
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Exotic States in Quarkonium Physics: Effective Theories of Heavy Mesonic Molecules and an AdS/QCD Model of Hybrid Quarkonium
… to be</p><p>the correct description of strong nuclear interactions. At high energy and momenta,</p><p>one can use QCD directly to compute quantities of physical interest related to the</p><p>strong force. At low energies and momenta, one should use a different description in</p><p>terms of the …
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Mössbauer and EPR studies of iron-containing proteins
… electronic spin multiplet and the electron-nuclear interactions. In general, spin-phonon coupling must be taken into account explicitly, and in one case spin-spin interaction of the iron with a radical has been observed. Model parameters are deduced from comparison of experimental spectra …
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Contemporary China-North Korea Bilateral Security Relations: Establishing the Role of Power and Ideas in Foreign Policy Decision-making
… cooperation, cyber security, arms trade, and nuclear security interactions. The second aim is to identify the primary intervening variables that facilitate and constitute bilateral relations. Constructed notions of political security play a prominent role in alliance management and cyber …
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B=4N Nuclei in the Skyrme Model
… and compare them with results found in the wider nuclear physics community. We go beyond rigid body quantization and develop a formalism of using vibrational quantisation to generate the energy spectrum of the Oxygen−16 nucleus. The Oxygen−16 nucleus is treated as an arrangement of four B = 4 …
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Nuclear Behaviors of ERK1/2 Signaling
… I took a multifaceted approach to study nuclear ERK1/2 signaling. First, I investigated the direct DNA binding activity of ERK2 in response to phosphorylation and mutation of key residues based on characterization of ERK2 phosphorylated on T188, a residue proximal to the classically …
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Group theoretical approach to pairing and non-linear phenomena in atomic nuclei
… pairing correlations as well as higher-J pn interactions in nuclei when protons and neutrons occupy the same shell. While these correlations manifest themselves most clearly in the binding energies of 0+ ground states, they also have a large effect on the spectra of excited isobaric analog 0+ …
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OMICs based identification of the mechanisms that underpin FAK’s regulation of gene expression
… such as P53, MDM2, IL33, RUNX1 and SP1. These nuclear interactions have been linked to proliferation, survival, differentiation and regulation of the anti-tumour immune response and cell cycle. However, despite these findings, the mechanism by which FAK regulates gene expression in the nucleus …
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Defining the cellular and molecular mechanism of maternally inherited hearing loss
… and characterising the c.3G>A SSBP1 variant as a nuclear modifier of m.1555A>G the work detailed in this thesis extends our understanding of mitochondrial-nuclear interactions in human disease. To ascertain the frequency of the m.1555A>G variant in patients with suspected mitochondrial hearing …
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Emergence, Formation and Dynamics of Hot QCD Matter
… century gave us the formulation of the theory of nuclear interactions, QCD, as well as that of the rest of visible matter encoded in the Standard Model of Particle Physics, much remains to be understood. In particular, the hot QCD matter produced in high energy collisions of heavy ions presents a …
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