流动系统中的激光增强固体和液体^(129)Xe核磁共振信号  

Soild and liquid ^(129)Xe NMR signals enhanced by spin-exchange optical pumping under flow

作　　者：周欣[1] 罗军[1] 孙献平[1] 曾锡之[1] 刘买利[1] 刘午阳[1] 

机构地区：[1]中国科学院武汉物理与数学研究所

出　　处：《物理学报》2002年第10期2221-2224,共4页Acta Physica Sinica

基　　金：国家自然科学基金 (批准号 :198740 73 );中国科学院知识创新工程项目(批准号 :KJCX2 W1)资助课题~~

摘　　要：在流动系统中 ,用半导体阵列激光器在低磁场下抽运Cs原子 ,由自旋交换碰撞产生极化的1 2 9Xe气体 ,在SY 80M核磁共振谱仪中 ,冻成固体和液体后的极化度分别为 2 16 %和 1 4 5 % ,和相同条件下未光泵的1 2 9Xe极化度相比 ,分别增强 6 0 0 0和 5 0 0 0倍 .为将激光增强固体和液体1 2 9Xe用于量子计算提供了基础和可能 .Laser polarized 129 Xe gas was produced by spin exchange with Cs atom optically pumped with diode laser array in a low field under flow. The nuclear spin polarizations of the solid and liquid 129 Xe frozen from the laser polarized 129 Xe gas were 2 16% and 1 45% respectively in the SY 80M NMR spectrometer, which corresponded to the enhancements of 6000 and 5000 compared to those without optical pumping under the same conditions. It could provide the base and possibility for quantum computers using laser enhanced solid and liquid 129 Xe. Polarization loss of transport and state change also was discussed in this paper.

关 键 词：流动系统 激光增强 固体 液体 光泵 激光极化 核磁共振信号 原子 相互作用 量子计算机 

分 类 号：O482.532[理学—固体物理] TP38[理学—物理]