多通道多光子动力学的飞秒符合成像

Femtosecond coincidence imaging of multichannel multiphoton dynamics.

作者信息

Rijs Anouk M, Janssen Maurice H M, Chrysostom Engelene T H, Hayden Carl C

机构信息

Laser Centre and Department of Chemistry, Vrije Universiteit, de Boelelaan 1083, 1081 HV Amsterdam, The Netherlands.

出版信息

Phys Rev Lett. 2004 Mar 26;92(12):123002. doi: 10.1103/PhysRevLett.92.123002.

DOI:10.1103/PhysRevLett.92.123002

PMID:15089669

Abstract

The novel technique of femtosecond time-resolved photoelectron-photoion coincidence imaging is applied to unravel dissociative ionization processes in a polyatomic molecule. Femtosecond coincidence imaging of CF3I photodynamics illustrates how competing multiphoton dissociation pathways can be distinguished, which would be impossible using photoelectron or ion imaging alone. Ion-electron energy correlations and photoelectron angular distributions reveal competing processes for the channel producing (e(-)+CF+3+I). The molecular-frame photoelectron angular distributions of the two major pathways are strikingly different.

摘要

飞秒时间分辨光电子-光离子符合成像新技术被用于揭示多原子分子中的解离电离过程。CF3I光动力学的飞秒符合成像说明了如何区分相互竞争的多光子解离途径，而仅使用光电子或离子成像则无法做到这一点。离子-电子能量相关性和光电子角分布揭示了产生（e(-)+CF+3+I）通道的竞争过程。两条主要途径的分子框架光电子角分布显著不同。