论文标题
寒冷中旋转非弹性散射的立体动力学+HD碰撞
Stereodynamics of rotationally inelastic scattering in cold He+HD collisions
论文作者
论文摘要
冷碰撞的立体动力学已成为量化分子碰撞研究和控制碰撞结果的肥沃基础。立体动力控制的基准过程是HE+HD碰撞中的旋转过渡。最近，Perreault等人对此过程进行了实验探测。通过检查$ j = 2 $到$ j'= 0 $状态的猝灭= 1 $振动歧管。在这里，通过在高度准确的AB INTION交互潜力上进行明确的量子散射计算，我们揭示了来自$ L = 1 $和$ L = 2 $ partial Wave的两个形状共振的组合如何控制立体动力学结果，而不是单个$ L = 2 $ l = 2 $ l = 2 $ l = 2 $ l =在实验中归因于实验中。此外，对于低于0.5 cm $^{ - 1} $的碰撞能量，表明对积分横截面的立体动力学偏好遵循一个简单的通用趋势。
Stereodynamics of cold collisions has become a fertile ground for quantized studies of molecular collisions and control of the collision outcome. A benchmark process for stereodynamic control is rotational transition in He+HD collisions. This process was recently probed experimentally by Perreault et al. by examining quenching from $j=2$ to $j'=0$ state in the $v=1$ vibrational manifold. Here, through explicit quantum scattering calculations on a highly accurate ab initio interaction potential for He+H$_2$, we reveal how a combination of two shape resonances arising from $l=1$ and $l=2$ partial waves controls the stereodynamic outcome rather than a single $l=2$ partial wave attributed in the experiment. Further, for collision energies below 0.5 cm$^{-1}$, it is shown that stereodynamic preference for integral cross section follows a simple universal trend.
