论文标题
共振信号的偏振依赖性消失 - 储存环中光学泵送的指示？
Polarization-Dependent Disappearance of a Resonance Signal -- Indication for Optical Pumping in a Storage Ring?
论文作者
论文摘要
我们在GSI Helmholtz重型离子研究中心的实验存储环ESR中对Li $^+$离子的激光光谱测量报告。驾驶$ 2S \，^3 \！{s} _1 \;（f = \ frac {3} {2} {2}）\，\ leftrightArrow \，2p \，^3 \！p_2 \;（f = \ frac {5} {2} {2} {2} {2} {2} {2}） 2S \，^3 \！{s} _1 \;（f = \ frac {5} {2}）$ $ $ up $λ$ - $^7 $^7 $ li $^+$带有两个叠加的激光束，发现循环极光的光的使用导致循环结构的消失，以荧光信号的失踪。这可以通过光学泵入偏振离子的黑暗状态来解释。我们对此过程进行了详细的理论分析，该过程支持光学泵的解释，并证明激光光引起的极化必须至少在存储环的离子往返过程中至少部分保持。储存环中的这种两极化离子光束将为新实验提供机会，尤其是在违反平等的情况下。
We report on laser spectroscopic measurements on Li$^+$ ions in the experimental storage ring ESR at the GSI Helmholtz Centre for Heavy Ion Research. Driving the $2s\,^3\!{S}_1\;(F=\frac{3}{2}) \,\leftrightarrow\,2p\,^3\!P_2\;(F=\frac{5}{2}) \leftrightarrow 2s\,^3\!{S}_1\;(F=\frac{5}{2})$ $Λ$-transition in $^7$Li$^+$ with two superimposed laser beams it was found that the use of circularly polarized light leads to a disappearance of the resonance structure in the fluorescence signal. This can be explained by optical pumping into a dark state of polarized ions. We present a detailed theoretical analysis of this process that supports the interpretation of optical pumping and demonstrates that the polarization induced by the laser light must then be at least partially maintained during the round trip of the ions in the storage ring. Such polarized ion beams in storage rings will provide opportunities for new experiments, especially on parity violation.
