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  Untersuchungen zur Mehrstufen-Laserspektroskopie an gespeicherten H+3 -Molekülionen

Bing, D. (2010). Untersuchungen zur Mehrstufen-Laserspektroskopie an gespeicherten H+3 -Molekülionen. PhD Thesis, Ruprecht-Karls-Universität, Heidelberg.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-0011-70BA-C Version Permalink: https://hdl.handle.net/11858/00-001M-0000-0011-70BB-A
Genre: Thesis

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 Creators:
Bing, Dennis1, Author           
Wolf, Andreas1, Referee           
Jochim, Selim2, Referee           
Affiliations:
1Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society, ou_904548              
2Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society, ou_904547              

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 Abstract: The triatomic H+3 molecular ion plays an important role in molecular quantum dynamics through its equilateral triangular structure. Many studies of molecular reactions involving H+3 have been done thus far, among them dissociative recombination in storage ring experiments with a cold electron-beam. For these strongly energy dependent reactions, the population in individual rovibrational levels is of large importance. To determine such populations for H+ 3 ions inside a storage ring, an extremely sensitive state-selective method must be used, such as the Resonant-Enhanced Multi-Photon Dissociation (REMPD). In REMPD, molecules are highly excited from a low lying initial level in a rst resonant step and photodissociated from these high lying states in a second step. To fully employ this method, detailed investigations are necessary. Here, an experiment is presented which determines the energy range of the highly excited vibrational states of H+3 suitable for photodissociation. Additional photodissociation experiments, using hot H+3 ions in the storage ring TSR at the Max-Planck Institute for Nuclear Physics, yield an e ective lifetime of these dissociated H+3 states. Finally selective vibrational excitation of cold H+3 (the fi rst step of REMPD) is discussed with the aim of reaching the highly excited vibrational states suitable for photodissociation.

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Language(s): deu - German
 Dates: 2010-07-21
 Publication Status: Accepted / In Press
 Pages: II, 110 S. : Ill., graph. Darst.
 Publishing info: Heidelberg : Ruprecht-Karls-Universität
 Table of Contents: -
 Rev. Type: -
 Identifiers: eDoc: 491043
 Degree: PhD

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