Device and method for capturing fine structure of product micro-dispersion emission cross section

Abstract

The invention relates to a device and a method for capturing a fine structure of a product micro-dispersion emission cross section. The vacuum system is composed of a reaction / detection chamber, a vacuum pump and a frequency mixing pool and is used for providing a high vacuum environment required for detecting product micro-dispersion emission cross section information, and the laser system is composed of a pumping source and a tunable laser and is used for preparing detection light of a threshold ionization product. The detection system is composed of an ion transmitter, a micro-channel plate, a fluorescent screen and a camera, and is used for imaging the fine structure of the micro-dispersion emission cross section of the ionized product. According to the invention, the electron recoil influence in the product ionization detection process is minimized through the threshold ionization technology, so that the product ion ball with the initial micro-dispersion emission cross section information is enabled to completely intercept the ion signal in the middle part of the ion ball at one time through the modes of longitudinal stretching and transverse gathering amplification; and micro-dispersion emission cross section information of a microscopic product presents an image map with relatively high angle resolution and energy resolution in a detection system.

Description

technical field [0001] The invention relates to a device and method for capturing the fine structure of the product differential scattering cross section. Background technique [0002] From a microscopic point of view, reactant molecules generally go through several simple reaction steps before they are finally transformed into product molecules, and each simple reaction step corresponds to a basic chemical reaction. The study of elementary chemical reactions at the level of quantum state resolution is helpful for people to understand and master the process and mechanism of the entire complex chemical reaction system. As the most important observable quantity in the study of elementary chemical reactions, the differential scattering cross section not only directly reflects the quantum state population, translational kinetic energy distribution, and spatial angle distribution of products, but also contains rich dynamic information such as reaction transition states. Therefor...

AI Technical Summary

Problems solved by technology

Since the detector cannot be infinitely small, and the selection of detection angles cannot be infinite, the information between adjacent angles can only be obtained through interpolation and smoothing. The method of reconstructing the product differential scattering cross section is relatively rough, especially for elementary chemical reactions with fine structure changes in the product differential scattering cross section in a small angle range, which will lose important kinetic information

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