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          Institute: MPI für Kernphysik     Collection: Neutrino Physics     Display Documents

ID: 198069.0, MPI für Kernphysik / Neutrino Physics
Beiträge zur Bestimmung der Eigenschaften von Zählrohren für das Sonnenneutrino-Experiment GNO
Authors:Germeroth, André
Date of Approval (YYYY-MM-DD):2004
Type of Thesis (e.g.Diploma):diplom
Name of University:Diplomarbeit, Ruprecht-Karls Universität
Place of University:Heidelberg
Physical Description 
(e.g. Total Number of Pages):
71 S. : Ill., graph. Darst.
Audience:Experts Only
Abstract / Description:This diploma thesis is part of the solar neutrino experiment GNO (Gallium Neutrino Observatory) located at Gran Sasso (Italy). In GNO a solar neutrino is captured by the 71Ga(í, e-)71Ge nuclear reaction. The radioactive 71Ge nucleus decays with a 11.43 day halflife time back to 71Ga with the release of an Augerelectron. The Augerelectron is then measured in a miniaturized proportional counter. During 69Ge-calibrations of the proportional counters the fluctuations of the background rate of a NaJ(TI) are the first topic of this work. These calibrations reduce the systematical error of GNO. So that knowledge of the background rate during calibration is critical for determining this error. In the second part of this investigation a measurement system for background in the proportional counters was constructed and commissioned. This system is a more cost effective alternative to the current setup at Gran Sasso. For both parts of the thesis the setups are described and the results are discussed.
Document Type:Thesis
Affiliations:MPI für Kernphysik/Group H. J. Völk/Neutrino Astrophysics (W. Hampel)
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