We describe an experimental approach that combines multidimensional NMR experiments with a steadily renewed source of laser-polarized 129 Xe. Using a continuous flow system to circulate the gas mixture, gas phase NMR signals of laser-polarized 129 Xe can be observed with an enhancement of three to f
Applications of laser-polarized 129Xe under continuous flow
β Scribed by Eike Brunner
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 196 KB
- Volume
- 37
- Category
- Article
- ISSN
- 0749-1581
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β¦ Synopsis
Laser-polarized noble gases such as 3 He or 129 Xe exhibit a nuclear spin polarization exceeding the equilibrium nuclear spin polarization by orders of magnitude, resulting in a corresponding sensitivity gain in NMR experiments. Recent developments in the application of laser-polarized 129 Xe are reviewed, especially with respect to materials research. The improvement of spin exchange optical pumping allows the production of laser-polarized 129 Xe under continuous flow. Applications of this new technique for the enhancement of magnetic resonance imaging and NMR spectroscopy are discussed. Spin polarization transfer from laser-polarized 129 Xe to other nuclei is described.
π SIMILAR VOLUMES
NMR signals of surface nuclei of solids may be enhanced by the a spin I, the macroscopic magnetization M I of the spins I transfer of spin polarization from laser-polarized noble gases. Until may deviate from its equilibrium value M 0 I . According to now such experiments have not been feasible unde
Laser-polarized 129 Xe dissolved in a foam preparation of fresh in blood found 4.5 { 1 s in red blood cells and 9 { 2 s in human blood was investigated. The NMR signal of 129 Xe dissolved plasma (18). This experiment used thermally polarized 129 Xe in blood was enhanced by creating a foam in which t