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- W2369854577 abstract "Over the last two-plus decades, hyperpolarized (HP) 129Xe has been exploited for a wide range of magnetic resonance applications. HP 129Xe is usually created by spin-exchange optical pumping (SEOP). This chapter reviews efforts in our laboratories and those of our collaborators to explore HP 129Xe generation via SEOP in the demanding regimes of high xenon densities and resonant laser powers. Of particular importance is the technical development of high-power frequency-narrowed laser sources which, combined with fundamental studies, have enabled high 129Xe polarizations to be achieved at relatively high Xe densities under conditions of stopped-flow production. Efforts exploring the interplay between gas mixture, laser power, laser wavelength, and cell temperature in determining 129Xe polarization efficiency have led to the development of automated, clinical-scale 129Xe “hyperpolarizers” capable of generating significant quantities of 129Xe with near-unity polarization and without the need for cryogenic collection—including an “open-source” design approved and demonstrated for human use, and an improved design centered around a 3-D printed oven. Another area of interest is how the high resonant laser energy is absorbed, thermalized, and dissipated during SEOP. The potential advantages of using Cs instead of—or in addition to—Rb as the alkali metal are also explored." @default.
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- W2369854577 date "2015-01-01" @default.
- W2369854577 modified "2023-09-23" @default.
- W2369854577 title "Chapter 6. Spin-exchange Optical Pumping at High Xenon Densities and Laser Fluxes: Principles and Practice" @default.
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- W2369854577 doi "https://doi.org/10.1039/9781782628378-00096" @default.
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