Next-Generation Perturbed Angular Correlation Spectroscopy

Nagl, Matthias

dc.contributor.advisor	Hofsäss, Hans Christian Prof. Dr.
dc.contributor.author	Nagl, Matthias
dc.date.accessioned	2014-06-12T08:42:07Z
dc.date.available	2014-06-12T08:42:07Z
dc.date.issued	2014-06-12
dc.identifier.uri	http://hdl.handle.net/11858/00-1735-0000-0022-5EE5-B
dc.identifier.uri	http://dx.doi.org/10.53846/goediss-4553
dc.language.iso	eng	de
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/3.0/
dc.subject.ddc	530	de
dc.title	Next-Generation Perturbed Angular Correlation Spectroscopy	de
dc.type	doctoralThesis	de
dc.contributor.referee	Hofsäss, Hans Christian Prof. Dr.
dc.date.examination	2014-05-13
dc.subject.gok	Physik (PPN621336750)	de
dc.description.abstracteng	Time differential perturbed angular correlation (TDPAC) spectroscopy is a nuclear solid-state physics method with unique advantages: Due to the penetrating power of gamma radiation used as information carrier, it allows studying of probe atoms' surroundings inside bulk material and under extreme conditions. It is sensitive to magnetic fields and electric field gradients at the probe nuclei's sites. This work aims at extending the scope of this well-established method by exploiting technological advancements. A newly developed software driven digital spectrometer reaches better performance and provides an improved measurement workflow, which increases the output and quality of measurements, compared to other spectrometers. Comprehensive simulation based studies concerning the properties and behavior of scintillation detectors as well as the performance of digital signal processing approaches for the analysis of these detectors' anode signals were conducted. These studies provide a deeper understanding of performance-limiting factors and allowed reaching of extraordinary time as well as energy resolution values of 219.8 ps and 3.30 % (both FWHM) for the spectrometer using the usual Co-60 and Cs-137 benchmarks. A new method for the automatic compensation of detector gain drift complements the other improvements of the measurement process. For the exploitation of new opportunities arising due to the spectrometer's improved performance and the availability of exotic nuclides at production facilities like ISOLDE (CERN), a database-driven nuclide search software was implemented. This software permits the identification of suitable candidate nuclides and thereby extended the selection of possible probe elements. Three new implantation chambers allowing for measurements involving exotic probe nuclides at ISOLDE were developed and are also presented in this work.	de
dc.contributor.coReferee	Krebs, Hans-Ulrich Prof. Dr.
dc.contributor.thirdReferee	Krause-Rehberg, Reinhard Prof. Dr.
dc.subject.eng	PAC	de
dc.subject.eng	TDPAC	de
dc.subject.eng	Spectrometer	de
dc.subject.eng	Detector Simulation	de
dc.subject.eng	Scintillation Detector	de
dc.subject.eng	Gamma-Gamma	de
dc.subject.eng	Drift Compensation	de
dc.subject.eng	Probe Nuclides	de
dc.subject.eng	ISOLDE	de
dc.subject.eng	Solid-State Physics	de
dc.subject.eng	Software Defined Spectroscopy	de
dc.subject.eng	Digital	de
dc.identifier.urn	urn:nbn:de:gbv:7-11858/00-1735-0000-0022-5EE5-B-7
dc.affiliation.institute	Fakultät für Physik	de
dc.identifier.ppn	788243780

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