Huang Xue-ren, Zhong Da, Mei Gang-hua, Zhu Xi-wen
Wuhan Physics and Mathematics Institute of Chinese Academy of Sciences, Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan 430071, China.
Guang Pu Xue Yu Guang Pu Fen Xi. 2002 Oct;22(5):738-40.
The polarized atomic beam has found many applications, such as in studying atomic scattering processes, producing polarized nucleus, verifying the parity principle, measuring surface parameters and enriching isotopes. In this paper, we mainly described the experiment of Eu isotope enrichment by means of magnetic deflection. According to the special inner energy level structure of Eu atom, we analyzed the theory of the polarized atomic beam and described the main experimental set-up. Using one coherent laser with the wavelength of 601.9 nm and sigma polarization, Eu153 atoms have been selectively optical pumped and polarized, so positive and negative polarized atomic beams could be produced. The polarized atomic beams have been focused and defocused after passing through the deflection by hex-magnet. Finally, some clear enrichmental signal has been obtained in way of hot-wire detection. During the process of the experiment, we carefully selected the optimized conditions, the Eu153 enrichment effect of 4% can be achieved using only one coherent laser.
极化原子束有许多应用，比如用于研究原子散射过程、产生极化核、验证宇称原理、测量表面参数以及富集同位素。在本文中，我们主要描述了利用磁偏转进行铕同位素富集的实验。根据铕原子特殊的内部能级结构，我们分析了极化原子束的理论并描述了主要实验装置。使用一台波长为601.9 nm且为σ极化的相干激光器，对Eu153原子进行了选择性光抽运和极化，从而产生了正负极化原子束。极化原子束在通过六极磁铁偏转后进行了聚焦和散焦。最后，通过热线探测的方式获得了一些清晰的富集信号。在实验过程中，我们仔细选择了优化条件，仅使用一台相干激光器就能实现4%的Eu153富集效果。
