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Single-Shot Diffusion Measurement in Laser-Polarized Gas

✍ Scribed by Sharon Peled; Ching-Hua Tseng; Aaron A. Sodickson; Ross W. Mair; Ronald L. Walsworth; David G. Cory

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
65 KB
Volume
140
Category
Article
ISSN
1090-7807

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✦ Synopsis

A single-shot pulsed gradient stimulated echo sequence is introduced to address the challenges of diffusion measurements of laser polarized 3 He and 129 Xe gas. Laser polarization enhances the NMR sensitivity of these noble gases by >10 3 , but creates an unstable, nonthermal polarization that is not readily renewable. A new method is presented which permits parallel acquisition of the several measurements required to determine a diffusive attenuation curve. The NMR characterization of a sample's diffusion behavior can be accomplished in a single measurement, using only a single polarization step. As a demonstration, the diffusion coefficient of a sample of laser-polarized 129 Xe gas is measured via this method.

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