论文标题
用高阶各向异性超快X射线散射解决多光子过程
Resolving Multiphoton Processes with High-Order Anisotropy Ultrafast X-ray Scattering
论文作者
论文摘要
我们介绍了强烈驱动的分子碘的超快X射线散射以及对散射信号的高阶各向异性成分的分析，最高可达四光子吸收。我们讨论了检索高富度高阶各向异性成分的技术细节，并概述了使用Legendre分解分析散射信号的方法。我们使用模拟的各向异性散射信号和傅立叶分析来绘制如何从各种Legendre订单中提取各向异性解离运动。我们观察到由各种多光子过渡同时引起的众多解离和振动运动。我们使用散射信号的各向异性信息来解散不同的过程，并在埃诺沃（De-Novo）上分配其解离速度。
We present first results on ultrafast X-ray scattering of strongly driven molecular Iodine and analysis of high-order anisotropic components of the scattering signal, up to four-photon absorption. We discuss the technical details of retrieving high fidelity high-order anisotropy components, and outline a method to analyze the scattering signal using Legendre decomposition. We use simulated anisotropic scattering signals and Fourier analysis to map how anisotropic dissociation motions can be extracted from the various Legendre orders. We observe multitude dissociation and vibration motions simultaneously arising from various multiphoton transitions. We use the anisotropy information of the scattering signal to disentangle the different processes and assign their dissociation velocities on the Angstrom and femtosecond scales de-novo.
