Napiralla, Philipp (2019)
Employing γ-ray Tracking as an Event-discrimination Technique for γ-spectroscopy with AGATA.
Technische Universität Darmstadt
doi: 10.25534/tuprints-00009673
Dissertation, Erstveröffentlichung
Kurzbeschreibung (Abstract)
This doctoral thesis focuses on the utilization of γ-ray tracking for the distinction between different scenarios, such as various possible incident γ-ray energies or different points of their origin. Such scenarios arose in an experimental benchmark test of the so-called Coulex-multipolarimetry, as well as in a first simulation-based approach to potential competitive double γ-decay experiments with the Advanced GAmma Tracking Array AGATA. The first benchmark of the Coulex-multipolarimetry was performed during the PreSPEC campaign at the GSI Helmholtzzentrum für Schwerionenforschung in 2014 to identify the potential πp3/2 → πp1/2 spin-flip transition in the neutron- rich 85Br via measurement of the E2/M1 multipole mixing ratio δ. The achieved performance of said first benchmark test is presented using standard methods of γ-spectroscopy as well as γ-ray tracking and derived methods. The competitive double γ decay, measured for the first time in 137Ba in 2015 via LaBr3(Ce) detectors, is a potential source for new information about nuclear structure. Since angular and energy correlations between the emitted γ rays are one of the main sources of said information, AGATA with its high angular and energy resolution appears to be predestined for this task. Due to its comparatively small time resolution capabilities, a successful distinction between single and double γ-decay events, however, has to fully rely on γ-ray tracking techniques. Whether such measurements of the double γ decay with AGATA are feasible is verified in this work based on simulations. Novel insights into γ-ray tracking which arose during the analysis resulted in the development of a novel γ-ray tracking algorithm, called ExpTrack , based on experimentally achieved Compton-scattering angles. This new approach is also presented in this work.
| Typ des Eintrags: | Dissertation | ||||
|---|---|---|---|---|---|
| Erschienen: | 2019 | ||||
| Autor(en): | Napiralla, Philipp | ||||
| Art des Eintrags: | Erstveröffentlichung | ||||
| Titel: | Employing γ-ray Tracking as an Event-discrimination Technique for γ-spectroscopy with AGATA | ||||
| Sprache: | Englisch | ||||
| Referenten: | Pietralla, Prof. Dr. Norbert ; Egger, Prof. Dr. Herbert | ||||
| Publikationsjahr: | 2019 | ||||
| Ort: | Darmstadt | ||||
| Datum der mündlichen Prüfung: | 9 Dezember 2019 | ||||
| DOI: | 10.25534/tuprints-00009673 | ||||
| URL / URN: | https://tuprints.ulb.tu-darmstadt.de/9673 | ||||
| Kurzbeschreibung (Abstract): | This doctoral thesis focuses on the utilization of γ-ray tracking for the distinction between different scenarios, such as various possible incident γ-ray energies or different points of their origin. Such scenarios arose in an experimental benchmark test of the so-called Coulex-multipolarimetry, as well as in a first simulation-based approach to potential competitive double γ-decay experiments with the Advanced GAmma Tracking Array AGATA. The first benchmark of the Coulex-multipolarimetry was performed during the PreSPEC campaign at the GSI Helmholtzzentrum für Schwerionenforschung in 2014 to identify the potential πp3/2 → πp1/2 spin-flip transition in the neutron- rich 85Br via measurement of the E2/M1 multipole mixing ratio δ. The achieved performance of said first benchmark test is presented using standard methods of γ-spectroscopy as well as γ-ray tracking and derived methods. The competitive double γ decay, measured for the first time in 137Ba in 2015 via LaBr3(Ce) detectors, is a potential source for new information about nuclear structure. Since angular and energy correlations between the emitted γ rays are one of the main sources of said information, AGATA with its high angular and energy resolution appears to be predestined for this task. Due to its comparatively small time resolution capabilities, a successful distinction between single and double γ-decay events, however, has to fully rely on γ-ray tracking techniques. Whether such measurements of the double γ decay with AGATA are feasible is verified in this work based on simulations. Novel insights into γ-ray tracking which arose during the analysis resulted in the development of a novel γ-ray tracking algorithm, called ExpTrack , based on experimentally achieved Compton-scattering angles. This new approach is also presented in this work. |
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| URN: | urn:nbn:de:tuda-tuprints-96737 | ||||
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 500 Naturwissenschaften und Mathematik > 530 Physik | ||||
| Fachbereich(e)/-gebiet(e): | 05 Fachbereich Physik 05 Fachbereich Physik > Institut für Kernphysik 05 Fachbereich Physik > Institut für Kernphysik > Experimentelle Kernphysik 05 Fachbereich Physik > Institut für Kernphysik > Experimentelle Kernphysik > Experimentelle Kernstruktur und S-DALINAC |
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| Hinterlegungsdatum: | 22 Dez 2019 20:56 | ||||
| Letzte Änderung: | 08 Okt 2024 10:20 | ||||
| PPN: | |||||
| Referenten: | Pietralla, Prof. Dr. Norbert ; Egger, Prof. Dr. Herbert | ||||
| Datum der mündlichen Prüfung / Verteidigung / mdl. Prüfung: | 9 Dezember 2019 | ||||
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| Suche nach Titel in: | TUfind oder in Google | ||||
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