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
Softcover reprint of the original 1st ed. 2016
by
Lutz Fechner
Book Details
Format
Paperback / Softback
Book Series
Springer Theses
ISBN-10
3319811835
ISBN-13
9783319811833
Edition
Softcover reprint of the original 1st ed. 2016
Publisher
Springer International Publishing AG
Imprint
Springer International Publishing AG
Country of Manufacture
GB
Country of Publication
GB
Publication Date
May 27th, 2018
Print length
151 Pages
Ksh 16,200.00
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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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