High-Resolution Experiments on Strong-Field Ionization of Atoms and Molecules
Lutz Fechner
Gebundenes Buch

High-Resolution Experiments on Strong-Field Ionization of Atoms and Molecules

Test of Tunneling Theory, the Role of Doubly Excited States, and Channel-Selective Electron Spectra

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In this thesis, the ionization of atoms and small molecules in strong laser fields is experimentally studied using a reaction microscope. The population of autoionizing doubly excited states in the laser fields is proven and a possible connection to the well-known dielectronic recombination processes is discussed.The fundamental process of tunnel ionization in strong laser fields is subject of investigation in a pump-probe experiment with ultrashort laser pulses. A coherent superposition of electronic states in singly charged argon ions is created within the first, and subsequently tunnel-ioni...