中科院大连化学物理研究所杨学明和大连化物所孙志刚，与中国科学技术大学王兴安团队报道了F + HD→HF + D反应中自旋轨道分波间的量子干涉现象。 相关研究成果于2021年2月26日发表于国际一流学术期刊《科学》。

电子自旋轨道相互作用对化学反应动力学的影响一直是研究的热点。

该文报道了电子自旋和轨道角动量对F+HD→HF+D反应影响的试验和理论研究。利用高分辨率成像技术，研究人员在产物转动量子态分辨的微分散射截面前向散射方向观察到了特殊的马蹄形图案。当考虑全自旋轨道特性时，这种反常的动力学模式只能用高精度的量子动力学理论来解释。

理论分析表明，马蹄形图案在很大程度上是自旋轨道分波共振之间的量子干涉的结果，这为自旋-轨道相互作用如何有效地影响反应动力学提供了一个独特的例子。

附：英文原文

Title: Quantum interference between spin-orbit split partial waves in the F + HD → HF + D reaction

Author: Wentao Chen, Ransheng Wang, Daofu Yuan, Hailin Zhao, Chang Luo, Yuxin Tan, Shihao Li, Dong H. Zhang, Xingan Wang, Zhigang Sun, Xueming Yang

Issue&Volume: 2021/02/26

Abstract: The effect of electron spin-orbit interactions on chemical reaction dynamics has been a topic of much research interest. Here we report a combined experimental and theoretical study on the effect of electron spin and orbital angular momentum in the F + HD → HF + D reaction. Using a high-resolution imaging technique, we observed a peculiar horseshoe-shaped pattern in the product rotational-state–resolved differential cross sections around the forward-scattering direction. The unusual dynamics pattern could only be explained properly by highly accurate quantum dynamics theory when full spin-orbit characteristics were considered. Theoretical analysis revealed that the horseshoe pattern was largely the result of quantum interference between spin-orbit split–partial-wave resonances with positive and negative parities, providing a distinctive example of how spin-orbit interaction can effectively influence reaction dynamics.

DOI: 10.1126/science.abf4205

Source: https://science.sciencemag.org/content/371/6532/936