B-型长不对称陀螺分子在六极静电场中的转动态选择和取向作用

Hexapole rotational state-selection and orientation of B-type prolate limit asymmetric top molecules

运用王函数(Wang Function)组合构成转动波函数推导了不对称陀螺分子转动能及其在外电场作用下的Stark能量的表达式,并将其应用到六极静电场态选择理论计算中.使用类似简并能级的计算方法讨论了彼此接近能级情况下分子转动态选择情况,获得了对(CH3)2O、O3、SO2分子实现获得具有高各项异性取向的分子束的优化条件.

The linear combination of Wang function is used to build the asymmetric top rotational wave function in the prolate limit of the asymmetric top molecules. Then the formulas for rotational energy and Stark energy are presented. Thereafter, we deal the calculation just as the method of the two level systems in the degenerate cases. The slightly asymmetric top molecules such as dimethylether, ozone and sulfur dioxide are calculated and investigated properly. With this method we obtain the optimized beam conditions to realize highly anisotropy orientation.