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  High-precision Q-value and mass measurements for neutrino physics with TRIGA-TRAP and commissioning of an on-line ion source for TRIGA-SPEC

Smorra, C. (2012). High-precision Q-value and mass measurements for neutrino physics with TRIGA-TRAP and commissioning of an on-line ion source for TRIGA-SPEC. PhD Thesis, Ruprecht-Karls Universität, Heidelberg.

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Datensatz-Permalink: https://hdl.handle.net/11858/00-001M-0000-0010-1AE3-3 Versions-Permalink: https://hdl.handle.net/11858/00-001M-0000-0010-1AE6-E
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2012 Dissertation Christian Smorra.pdf (beliebiger Volltext), 15MB
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2012 Dissertation Christian Smorra.pdf
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 Urheber:
Smorra, Christian1, Autor           
Litvinov, Yuri2, Gutachter
Blaum, Klaus, Gutachter
Affiliations:
1Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society, ou_904548              
2GSI Helmholtzzentrum für Scherionenforschung, Darmstadt, ou_persistent22              

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 Zusammenfassung: The observation of neutrinoless double-electron capture would prove the Majorana character of neutrinos. Transitions with an energy degeneracy of the initial and final state show a resonant enhancement of the decay rate and would be important for neutrino physics experiments. In order to identify such transitions, precise Q-value measurements with Penning-trap mass spectrometers play a key role. In this thesis, the resonance condition of neutrinoless double-electron capture in 106Cd, 108Cd, and 184Os was investigated by Q-value measurements with the Penning-trap mass spectrometer TRIGA-TRAP. In addition, the Q value of the double-beta decay in 110Pd was measured. A high-voltage platform and an on-line ion source for the ionization of shortlived neutron-rich fission products for the TRIGA-SPEC experiment located at the research reactor TRIGA Mainz has been commissioned and tested. The aim is to provide a radioactive ion beam for high-precision mass spectrometry and collinear laser spectroscopy. For the extraction from the TRIGA reactor, the fission products are attached to aerosol particles and transported with a gas-jet system to the on-line ion source. This ion source has to cope with a high gas load and has to destroy the bond between fission product and aerosol particle. It was investigated, whether an 2.45 GHz ECR ion source is suited for this task.

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Sprache(n): eng - English
 Datum: 2012-07-20
 Publikationsstatus: Angenommen
 Seiten: VI, 159 S. : Ill., graph. Darst.
 Ort, Verlag, Ausgabe: Heidelberg : Ruprecht-Karls Universität
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 Art des Abschluß: Doktorarbeit

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