Femtosecond intense laser-induced ionization of electron-wave packets or can return to the parent ion and then with the occurrence of re-scattering process, caused by re-scattering of high-order harmonic spectra or photoelectron spectroscopy to detect the molecular structure and rapid evolution of electronic states provide Effective way.At present, the development of space-time high-resolution atomic structure and kinetic detection methods for the research field of widespread concern.
Liu Xiaojun, a researcher at Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, researched by Quan Wei and others, together with Chen Jing, a researcher at Beijing Institute of Applied Physics and Computational Mathematics and associate researcher Wu Yong, proposed a new laser-induced inelastic electron diffraction scheme and adopted This scheme experimentally determined the inelastic scattering differential cross section caused by the electron-inert gas ion collisions.
According to reports, in this program, experts use the femtosecond laser-driven atom-generated electron scattering package instead of the traditional electron beam electron inertia precursor ion structure detection method. Combined with the number of objects in Wuhan pre-built High-resolution electron-ion mass spectrometer devices and measurement methods, they experimentally measured the photoelectron corresponding to the electron-ion impact ionization process two-dimensional momentum spectra and extracted from the interaction of electrons and the parent ion inelastic scattering differential cross section, The experimental results are in good agreement with the theoretical results of the twisted wave Bonn approximation.
This scheme inherits the advantages of ultrahigh spatial resolution of traditional electron diffraction methods and possesses ultra-high temporal resolution capability, which provides an important means to study the laser-induced ultra-fast kinetic process of atomic molecules on the femtosecond and even second-order time scales. The research results recently published in the academic journal "Physical Review Letters" on.