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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 (Paperback, Softcover reprint of the original 1st ed. 2016)
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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 (Paperback, Softcover reprint of the original 1st ed. 2016)
Series: Springer Theses
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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-ionized with the second pulse. This gives
access to state-selective information about the tunneling process
and allows to test common models. Moreover, the ionization of
krypton and argon at different wavelengths is studied, from the
multiphoton to the tunneling regime. The wavelength-dependent
investigations are furthermore extended to molecular hydrogen. In
addition to ionization, this system might undergo different
dissociative processes. Channel-selective electron momentum
distributions are presented and compared to each other.
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