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 5 of 5 for “"Spin Exchange Optical Pumping"”.
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Clinical-Scale Hyperpolarization of 129Xe and 131Xe via Stopped-Flow Spin Exchange Optical Pumping
The fundamental physics of spin-exchange optical pumping (SEOP) has been explained in detail by many brilliant scientists since its discovery in the 50’s and 60’s. Although some interactions remain only tenuously understood, mathematical relationships have been mapped across many trajectories with …
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SPECTROSCOPIC STUDIES OF NUCLEAR SPINS POLARIZED VIA SPIN EXCHANGE OPTICAL PUMPING AND DYNAMIC COUPLING IN CRYPTOPHANE HOST-GUEST COMPLEXES
… largely from extremely small (Boltzmann) nuclear spin polarization at thermal equilibrium--in even the strongest of magnets. This dissertation focuses on selected research areas that maybe used to combat the limitations presented by NMR and measure weak spectral responses with atomic-scale …
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Using High-Powered, Frequency-Narrowed Lasers For Rb/129Xe and Cs/129Xe Spin-Exchange Optical Pumping To Achieve Improved Production of Highly Spin-Polarized Xenon For Use In Magnetic Resonance Applications
… minute nuclear magnetic moments and low nuclear spin polarization levels at thermal equilibrium (~10-5 to 10-6), and thus necessitates the use of relatively large sample volumes. One way to overcome this low detection sensitivity is to introduce a species with highly non-equilibrium nuclear spin …
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Precision measurement of the spin-dependent asymmetry in the threshold region of quasielastic ³He [right arrow] (e [right arrow], e)Ì
The first precision measurement of the spin-dependent asymmetry in the threshold region of 3He(e, e') was carried out in Hall A at the Jefferson Laboratory, using a longitudinally polarized continuous wave electron beam incident on a high-pressure polarized 3He gas target. The polarized electron …
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Fundamental studies and applications for the development of novel MRI contrast agents: Hyperpolarized xenon-129 and superparamagnetic iron oxide nanoparticles
… 1: the manipulation of populations of nuclear spins in different energy states using radiofrequency (rf) pulses. This dissertation work focuses on the development of two different types of MRI contrast agents: hyperpolarized 129Xe gas and superparamagnetic iron oxide nanoparticles (SPIONs). The …