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Cs 39D态Rydberg原子Stark光谱的实验研究
Experimental investigation of Stark effect of ultra-cold 39 D cesium Rydberg atoms
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摘要: 本文从理论和实验上对Cs39D态Rydberg原子在弱电场作用下的Stark效应做了详细研究.理论上利用数值方法计算了Cs原子39D态的Stark结构;实验上,采用两步激发超冷基态原子获得超冷Rydberg原子,通过场电离的方法获得了39D态的Stark光谱,测量获得α_2~(5/2),α_0~(3/2) ,α_2~(3/2)和α_0~(3/2)相应的极化率分别为:62(7),-146(13),73(6)和-106(20)MHz·V~(-2) cm~2,实验结果与理论相符合.Abstract: In this paper,we investigate the Stark effect of ultra-cold 39D cesium Rydberg atoms in low-field.The Stark structure of 39D Rydberg states is calculated numerically.The cold cesium atoms are excited to Rydberg states via two step process and the Stark spectra are obtained by field-ionization method.The scalar and tenson polarizabilities of 39D cesium Rydberg atoms are measured to be α_2~(5/2)=62(7)MHz·V~(-2) cm~2,α_0~(5/2)=-146(13)MHz·V~(-2)cm~2,α_2~(3/2)=73(6)MHz·V~(-2)cm~2,α_0~(3/2)=-106(20)MHz·V~(-2)cm~2 respectively.The experimental values are in agreement with the theoretical results.
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