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Characterization of a HPGe Coaxial Well Detector for Low Energy Gamma Spectroscopy & Sensitivity Analysis of Germanium Spectrometers

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Winkler,  Daniel
Division Prof. Dr. Manfred Lindner, MPI for Nuclear Physics, Max Planck Society;

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Ba-Arbeit_DanielWinkler.pdf
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Citation

Winkler, D. (2018). Characterization of a HPGe Coaxial Well Detector for Low Energy Gamma Spectroscopy & Sensitivity Analysis of Germanium Spectrometers. Bachelor Thesis, Ruprecht-Karls-Universität, Heidelberg.


Cite as: http://hdl.handle.net/21.11116/0000-0002-6FE4-1
Abstract
Experiments looking for phenomena beyond the standard model substantially rely on environmental background reduction. Therefore, it is crucial to any of these experiments to conduct a precise material selection in order to ensure high radiopurity near the detector volume. In many cases, this can be achieved by low-level gamma-spectroscopy. Detailed knowledge of the characteristics of the spectrometers is required to determine the activity of a sample. Within this thesis, a coax well spectrometer, designed for low energy gamma spectroscopy, has been reactivated. The geometry of the detector was implemented in a Monte Carlo simulation. Characteristic parameters of the spectrometer such as the dead layer thickness and the thickness of the end cap were determined by matching the simulation to the measurement. The implemented software model was then used to estimate the different background contributions and their expected reduction due to dedicated shielding. The second part of this work addresses the sensitivity determination of germanium spectrometers. A study with five different detectors was performed with a standardized procedure, making it possible to compare different detector setups.