We have greatly enhanced the nuclear magnetic resonance signal of low-pressure gas ( 15 Torr of "'Xe) on an NMR spectrometer with linearly polarized laser radiation. An ampliticatton factor of the nuclear polarization is of the order ofmagnitude of IO4 as compared with the Boltzmann polarization in
High-resolution NMR of low pressure laser-polarized 129Xe gas
β Scribed by Gareth R. Davies; Thomas K. Halstead; Rodney C. Greenhow; Kenneth J. Packer
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 552 KB
- Volume
- 230
- Category
- Article
- ISSN
- 0009-2614
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π SIMILAR VOLUMES
The enhanced 129Xe gas ( 15 Torr) NMR signal has been observed on a Varian XL-200 NMR spectrometer with spin-exchange optical pumping. An amplification factor of the nuclear spin polarization of gaseous 129Xe is of the order 103 times the Boltzmann polarization at 60Β°C. The binary spin-exchange cros
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
Size dependency of the relaxation time T 1 was measured for laserpolarized 129 Xe gas encapsulated in different sized cavities made by glass bulbs or gelatin capsules. The use of laser-polarized gas enhances the sensitivity a great deal, making it possible to measure the longer 129 Xe relaxation tim