Magnetic resonance imaging of convection in laser-polarized xenon.

Mair, R W; Tseng, C H; Wong, G P; Cory, D G; Walsworth, R L

Mair, R W; Tseng, C H; Wong, G P; Cory, D G; Walsworth, R L.

Afiliación

Mair RW; Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138, USA.

Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics ; 61(3): 2741-8, 2000 Mar.

Article en En | MEDLINE | ID: mdl-11046596

RESUMEN

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.

Asunto(s)

Convección; Rayos Láser; Espectroscopía de Resonancia Magnética/métodos; Xenón/análisis; Difusión; Fantasmas de Imagen; Fenómenos Físicos; Física; Xenón/química

Palabras clave

NASA Discipline Environmental Health; Non-NASA Center

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Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Xenón / Espectroscopía de Resonancia Magnética / Convección / Rayos Láser Idioma: En Revista: Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics Asunto de la revista: MEDICINA Año: 2000 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos

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