Advances in ultrafast gas-phase x-ray scattering
Advances in ultrafast gas-phase x-ray scattering
复制标题
超快气相 X 射线散射的进展
DOI：
10.1088/1361-6455/abbfea
复制
发表时间：
2020
期刊：
影响因子：
--
通讯作者：
P. Weber
中科院分区：
文献类型：
--
作者：
Brian Stankus;H. Yong;J. Ruddock;Lingyu Ma;Andrés Moreno Carrascosa;Nathan Goff;S. Boutet;Xuan Xu;Nikola Zotev;A. Kirrander;M. Minitti;P. Weber
X射线自由电子激光器和脉冲电子源的最新发展使超快散射成为探索分子动力学的一个越来越强大的工具。本文介绍了我们最近在超快气相X射线散射实验在LCLS的实验和方法的进展。一个重新设计的短光程无窗衍射仪，再加上仔细优化的样品密度和独立的归一化的X射线强度波动，提供气相散射图案具有非常高的信号-噪声比。这些进展，再加上仔细的几何优化和数据处理，提供了良好的协议与高水平从头算总散射模式的基态和激发态信号。
Recent developments of x-ray free electron lasers and pulsed electron sources have enabled ultrafast scattering to become an increasingly powerful tool for exploring molecular dynamics. This article describes our recent experimental and methodological advances in ultrafast gas-phase x-ray scattering experiments at the LCLS. A re-designed short-pathlength windowless diffractometer is coupled with careful optimization of sample density and independent normalization of x-ray intensity fluctuations to provide gas-phase scattering patterns with exceptionally high signal-to-noise ratios. These advances, coupled with careful geometry optimization and data treatment, provide both ground- and excited-state signals in excellent agreement with high level ab initio total scattering patterns.
DOI：
10.1073/pnas.1805335115
发表时间：
2018-06-26
影响因子：
11.1
作者：
Bennett, Kochise;Kowalewski, Markus;Mukamel, Shaul
通讯作者：
Mukamel, Shaul