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Full-Text Articles in Physical Sciences and Mathematics
3d Momentum Imaging Spectroscopy Probing Of Strong-Field Molecular And Surface Dynamics, Lin Fan
3d Momentum Imaging Spectroscopy Probing Of Strong-Field Molecular And Surface Dynamics, Lin Fan
Wayne State University Dissertations
Electron-ion coincidence measurements in combination with 3-dimensional (3D) momentum imaging can provide comprehensive 3D-momentum information to unravel multichannel photoionization/dissociation processes, and thus is an effective tool to investigate atomic/molecular dynamics. A camera-based 3D coincidence momentum imaging system and the velocity mapping imaging (VMI) based machine were introduced in Chapter 2. Studies of strong field dissociative single and double ionization of relatively large molecules camphor and 2-phenylethyl-N, N-dimethylamine (PENNA) were carried out and illustrated in Chapter 3. We demonstrated the main products of double ionization of PENNA were singlet diradicals. In Chapter 4, a novel angle resolved-photoemission spectroscopy based on VMI …
A New Three-Dimensional (3d) Particle Coincidence Imaging System And Its Applications In Strong Field Studies Of Reaction Dynamics In Atoms And Molecules, Yunfei Lin
Wayne State University Dissertations
Electron‐electron interaction is an important and interesting research theme both in chemistry and physics. Experimental study of electron correlation is hindered by the long dead time (the time within which no more than two electrons can be detected) of electron detection system. We developed a new three‐dimensional (3D) particle coincidence imaging system to remove this restriction. The detection system employs a new strategy: It uses a fast‐frame camera to record positional information on 2D MCPs/phosphor detector (so the particle velocities in two dimensions can be measured); It utilizes a high‐speed digitizer to pick up the signal from MCP lead, off‐line …
Developing A Toolbox To Probe Reaction Dynamics With Strong Field Ionization And Non-Linear Attosecond Spectroscopy, Thushani Nikeshala Herath
Developing A Toolbox To Probe Reaction Dynamics With Strong Field Ionization And Non-Linear Attosecond Spectroscopy, Thushani Nikeshala Herath
Wayne State University Dissertations
Electronic motions which happen in 10 to 100 of attoseconds are the heart of all processes in nature. Therefore monitoring and extracting details in this fundamental level will provide new prospect to the areas as information technology, basic energy science, medicine and life sciences. The challenge being, develop a tool to reach such a fast time scale for real time observation in atomic level. In this thesis work we have address this matter using two interesting approaches related to the laser matter interaction: strong field ionization and nonlinear attosecond spectroscopy. The first part is based on the studies related to …