Experimental observation and theoretical calculation of the diamagnetic spectrum of sodium Rydberg states
Experimental observation and theoretical calculation of the diamagnetic spectrum of sodium Rydberg states
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DOI：
10.1103/physreva.86.012517
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发表时间：
2012-07
影响因子：
2.9
通讯作者：
W. Gao;H. Yang;Hong Cheng;Xiao-jun Liu;Hongping Liu
中科院分区：
文献类型：
--
作者：
W. Gao;H. Yang;Hong Cheng;Xiao-jun Liu;Hongping Liu
我们报告了在高达 3 T 的强磁场中观察到的钠原子的抗磁光谱，并将其与基于精确量子缺陷理论公式的理论计算进行比较。我们重点研究从基态 3s 态到激发 np 里德堡态的单光子吸收过程，其磁量子数由激光场的偏振决定。计算采用B样条基展开和复杂空间坐标旋转技术，在适当考虑原子核效应的情况下，其结果与观测结果吻合良好。当绘制磁场图时，能级反交叉和核诱导的 np 态相互作用为研究量子缺陷对抗磁谱的影响提供了清晰的特征。
We report diamagnetic spectra of sodium atoms observed in a strong magnetic field up to 3 T and compare them with theoretical calculations based on the formulation of an exact quantum-defect theory. We focus on one-photon absorption processes from the ground 3s state to the excited np Rydberg states whose magnetic quantum numbers are determined by the polarization of the laser field. The calculations employ B-spline basis expansion and the complex spatial coordinate rotation technique, and their results agree well with the observed ones when atomic core effects are appropriately taken into account. When graphed against magnetic field, level anticrossings and core-induced interaction of the np states provide clear signatures for studying the effects of quantum defect on the diamagnetic spectra.