Liquid hyperpolarized Xe129 produced by phase exchange in a convection cell

Abstract

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Generation of laser-polarized xenon using fiber-coupled laser-diode arrays narrowed with integrated volume holographic gratings

“…While altering the spectral profiles of the VHG-LDAs utilized here generally requires varying the output power, nextgeneration VHG-LDAs capable of providing true tunability at the Rb D 1 wavelength should become available in the near future [29,30]-a desirable capability in light of the observed dependence of P Xe on the D 1 offset. Finally, while the present data were derived from 'batch-mode' Rb/ 129 Xe OP, we expect that the demonstrated advantages will translate well to OP setups employing alternate configurations [7,11,12,[31][32][33][34], alkali metals [1,35], and/or noble gas isotopes [1,36,37].…”

Enabling Clinical Technologies for Hyperpolarized 129Xenon Magnetic Resonance Imaging and Spectroscopy

“…This system proved to be surprisingly effective,p roducing P Xe as high as 69 %a fter only 5minutes of recirculation with two 40 Wc oupled lasers. [96] Saam and co-workers introduced ad ifferent SEOP hyperpolarizer design with the goal of creating large quantities of liquid HP 129 Xe [97] with ar elatively small device.I n their method, 129 Xe is still hyperpolarized in the gas phase via SEOP;h owever,o nce polarized, the gas undergoes phase exchange (facilitated by convection) with ac olumn of liquid xenon, allowing polarization to accumulate in the liquid phase.U sing just an 8-mL spherical SEOP cell and 15 W LDA, the apparatus provided 8% P Xe in 0.1 mL of liquid Xe in 15 min.…”

“…Saam and co‐workers introduced a different SEOP hyperpolarizer design with the goal of creating large quantities of liquid HP 129 Xe [97] with a relatively small device. In their method, 129 Xe is still hyperpolarized in the gas phase via SEOP; however, once polarized, the gas undergoes phase exchange (facilitated by convection) with a column of liquid xenon, allowing polarization to accumulate in the liquid phase.…”

Universal Long-Time Behavior of Nuclear Spin Decays in a Solid

“…For our experiments, both isotopically natural (26.4% 129 Xe, 21.29% 131 Xe) and enriched (86% 129 Xe, 0.13% 131 Xe) samples of solid polycrystalline xenon containing 129 Xe polarized to 5%-10% were prepared using spinexchange convection cells [7,29]. FIDs and solid echoes were acquired at 77 K in an applied field of 1.5 T ( 129 Xe Larmor frequency of 17.6 MHz), well into the high-field limit of Eq.…”