强磁场下Cs原子超精细塞曼能级上的光泵浦研究

强磁场中的Ｃｓ原子有较大的超精细塞曼分裂，实验用频率可调谐的窄线宽半导体激光调谐到各超精细塞曼能级上进行光泵浦，利用稳态吸收谱方法研究了原子的光泵浦。表明基态超精细相互作用的碰撞修正项导致的驰豫跃迁是谱形状和电子自旋极化新特征的根缘。同时提出了强场下极化度的一种测量方法。

Optical Pumping on Hyperfine Zeeman Levels of Cs Vapor in High Magnetic Field

Cs atoms have large hyperfine Zeeman separations in a high magnetic field. Cs vopor is optically pumped and detected with diode lasers in the high magnetic field. We obtained the steady absorption spectra and used them to investigate the steady population distribution, relaxation transitions, and electronic spin polarizations at different frequency tunings of the pumping laser. It is show that the collision-induced modificatin of hyperfine Zeeman interaction has taken part in the process of relaxation and polarization. We also introduced a new method for measurement of electronic spin polarization of alkali atoms in high magnetic fields.