利用单模半导体激光器激发Rb原子到5P3/2态,将Rb空心阴极灯发射的6D5/2→5P3/2的629.8 nm线作为吸收线.测量5P3/2态原子密度,由测得的激发态原子密度结合荧光强度比,得到能量合并过程Rb(5P3/2)+Rb(5P3/2)→Rb(5D)+Rb(5S)的碰撞截面为(5.0士1.9)×10-14cm2.利用荧光法测量了Rb52P精细结构碰撞转移截面.直接荧光是由5P3/2态发射的,敏化荧光是由精细结构碰撞转移和碰撞能量合并产生的.由相对荧光强度得到了转移截面σ(5P3/2→5P1/2)=(3.0土0.9)×10-15cm2.碰撞能量合并速率系数比精细结构混合率大一个数量级,与其它实验结果进行了比较.
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