~(129)Xe核自旋极化转移增强分子的核磁共振信号

激光极化的12 9Xe核具有极高的非平衡极化度和长的弛豫时间 ,这一特点使得它能够极化转移增强液体、固体或者固体表面分子中原子核自旋极化。因而 ,提高了它们的核磁共振探测灵敏度和扩展了在材料和表面科学研究中的应用。综述激光极化12 9Xe核与其它分子中原子核之间的极化转移研究与进展 ,介绍相关物理机制和参数的测量。

Enhancement of molecular NMR signal induced by polarization transfer from laser-polarized ~(129)Xe

There is a large non equilibrium nuclear polarization and a longer relaxation time in the laser polarized 129 Xe produced by means of optical pumping and spin exchange. The characteristics of the laser polarized 129 Xe permit the transfer of the polarization to enhance the atomic nuclear spin in liquid, solid and surface of solid molecules. Therefore, the sensitivity in nuclear magnetic resonance measurements for the molecules is enhanced and applications in the investigations of materials and suface sciences are expanded. In this article, the progress in the investigations of materials and surface sciences are expanded. In this article, the progress in the investigations of the polarization transfer between laser polarized 129 Xe and the atomic nuclei in the molecules, the relative physics and the measurement of some parameters are introduced.