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primary topic: Ionic Fragmentation Channels in Electron Collisions of Small Molecular Ions

Ionic Fragmentation Channels in Electron Collisions of Small Molecular Ions
type: Article
abstract: Dissociative Recombination (DR) is one of the most important loss processes of molecular ions in the interstellar medium (IM). Ion storage rings allow to investigate these processes under realistic conditions. At the Heidelberg test storage ring TSR a new detector system was installed within the present work in order to study the DR sub-process of ion pair formation (IPF). The new detector expands the existing electron target setup by the possibility to measure strongly deflected negative ionic fragements. At the TSR such measurements can be performed with a uniquely high energy resolution by independently merging two electron beams with the ion beam. In this work IPF of HD+, H3+ and HF+ has been studied. In the case of HD+ the result of the high resolution experiment shows quantum interferences. Analysis of the quantum oscillations leads to a new understanding of the reaction dynamics. For H3+ it was for the first time possible to distinguish different IPF channels and to detect quantum interferences in the data. Finally the IPF of HF+ was investigated in an energy range, where in previous experiments no conclusive results could be obtained.
date: 2008
status: published
author list: authors
type: EPrint
type: DoctoralThesisEPrint
is part of: repository
has document: Ionic Fragmentation Channels in Electron Collisions of Small Molecular Ions (PDF)
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subject: 530 Physik

Ionic Fragmentation Channels in Electron Collisions of Small Molecular Ions (PDF)
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has file: dissertation_hoffmann_28012009.pdf
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Jens Hoffmann
type: Person
given name: Jens
family name: Hoffmann

Ionic Fragmentation Channels in Electron Collisions of Small Molecular Ions (Other)
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primary topic: Ionic Fragmentation Channels in Electron Collisions of Small Molecular Ions

530 Physik
type: Concept
preferred label: 530 Physics @en