title: Magnetic resonance imaging of convection in laser-polarized xenon.
abstract: We demonstrate nuclear magnetic resonance (NMR) imaging of the flow and diffusion of laser-polarized xenon (129Xe) gas undergoing convection above evaporating laser-polarized liquid xenon. The large xenon NMR signal provided by the laser-polarization technique allows more rapid imaging than one can achieve with thermally polarized gas-liquid systems, permitting shorter time-scale events such as rapid gas flow and gas-liquid dynamics to be observed. Two-dimensional velocity-encoded imaging shows convective gas flow above the evaporating liquid xenon, and also permits the measurement of enhanced gas diffusion near regions of large velocity variation.
authors.affiliation: Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138, USA.
authors.forename: R W
authors.initials: RW
authors.lastname: Mair
authors.forename: C H
authors.initials: CH
authors.lastname: Tseng
authors.forename: G P
authors.initials: GP
authors.lastname: Wong
authors.forename: D G
authors.initials: DG
authors.lastname: Cory
authors.forename: R L
authors.initials: RL
authors.lastname: Walsworth
mesh_terms: D018481:Convection; D004058:Diffusion; D007834:Lasers; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D019047:Phantoms, Imaging; D055585:Physical Phenomena; D010825:Physics; D014978:Xenon / Q000032:analysis* / Q000737:chemistry
chemical_list: D014978:Xenon