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Thesis

Competition of detachment, dissociation, and radiative decay channels in highly excited C2−

MPS-Authors
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Schmidt,  Viviane Charlotte       
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Citation

Schmidt, V. C. (2020). Competition of detachment, dissociation, and radiative decay channels in highly excited C2−. Master Thesis, Ruprecht-Karls-Universität, Heidelberg.


Cite as: https://hdl.handle.net/21.11116/0000-000F-A540-E
Abstract
The C2− dimer is one of the most studied anionic molecular systems. Nevertheless, the new research opportunities available at the electrostatic Cryogenic Storage Ring facility at the Max-Planck Institut in Heidelberg offer a different approach to the study of this anion. By thermally populating all available states in a sputter source and measuring auto-decay rates, ro-vibronic levels out of reach in previous laser experiments become available for investigation. In this thesis auto-fragmentation and auto-detachment spectra are analysed to identify the corresponding decaying levels of C2−. To this end, radiative lifetimes and dissociation rates of a range of ro-vibronic levels are calculated and compared to the measured signal. The auto-fragmentation signal can be traced back to anionic doublet states with long or innite radiative lifetimes, while the auto-detachment signal might be the strongest experimental indication of one of the dimer's quartet states to date.