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利用线偏振和园偏振激光受激拉曼抽运技术 ,选择性地制备了C2 H2 线性分子电子基态中红外非激活振动模″v2 =1的单一转动态J″(X1∑+ g ,v″ =1,J″)的角动量定向布居和定位布居。并从线偏振及园偏振紫外激光诱导的A1 Au(′v3 =1)←X1∑ + g(″v2 =1)的电子跃迁荧光光谱中 ,直接测定了C2 H2 (X1∑ + g ,v″ =1,J″=4、7、8、9、10、11、12、13)的角动量定向布居值A( 1)0 为 0 .7～ 0 .8之间 ,对于J″ =2、3、4、5、6、7、8、9、11的角动量定位布居值A( 2 )0 为- 0 .7～ - 0 .9。这一结果表明 ,人们可利用上述激光抽运技术可控制C2 H2 分子在反应前的角动量空间布居。
The linearly polarized and p-polarized laser stimulated Raman pumping technique was used to fabricate a single rotational state J “(X1Σ + g, v” = 1, J “) of the angular momentum of population and positioning of population. In the electron transition fluorescence spectra of A1 Au (’v3 = 1) ← X1Σ + g (”v2 = 1) induced by linearly polarized and UV- = 1, J "= 4, 7, 8, 9, 10, 11, 12, 13) is 0 .7 ~ 0. , 3, 4, 5, 6, 7, 8, 9, 11, the angular momentum locating value A (2) 0 is -0.7 ~ -0.9. This result indicates that one can use the above laser pumping technique to control the angular momentum of C2H2 molecules before their reaction.