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

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.