利用脉冲激光双光子激发Rb(5S)到Rb(5DJ,7S)态,在样品池条件下,利用原子荧光光谱方法研究了Rb(SDJ,7S)+Rb(5S)的碰撞能量转移过程.利用三能级模型的速率方程分析,在不同的Rb(5S)密度下,通过对直接荧光和转移荧光的时间积分荧光强度的测量,得到了Rb(5D5/2)→Rb(5D3/2)精细结构转移截面为(3.7±0.9)×10-14cm2.而测得的碰撞转移到Rb(5DJ)以外态的截面是Rb(5D)→Rb(7S)转移截面和碰撞能量合并逆过程截面之和,还可测得Rb(5D)→Rb(7S)的碰撞转移截面为(1.6±0.4)×10-16cm2,故Rb(5D)+Rb(5S)→Rb(5P)+Rb(5P)的截面分别为(3.1±1.2)×10-14cm2(对J=5/2)和(2.0±0.6)×10-14cm2(对J=3/2),5DJ态主要是通过碰撞能量合并的逆过程(即Rb(5DJ)+Rb(5S)→Rb(5P)+Rb(5P))猝灭.
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