Bachelor theses
Characterization of a solid state scintillation detector (LaBr3, CeBr3, SrI2)
After smoking, inhalation of the radioactive noble gas radon and its derivatives represents the greatest risk of developing lung cancer. The EU has addressed this risk in its Basic Safety Standards. In Germany, protection against radon is implemented by the Radiation Protection Act and the subordinate ordinance. Thus it is ensured that the radon-222 activity concentration in residential buildings does not exceed an average of 300 Bq/m³.
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Description
As part of the EMPIR project (European Metrology Programme for Innovation and Research) MetroRADON, novel sources for the generation of constant radon atmospheres in the range of < 300 Bq/m³ are being developed at the Physikalisch-Technische Bundesanstalt. Radium-226 is used in such a physical-chemical composition that radon-222 emanates at a known and constant rate. In order to guarantee the stability of the newly developed emanation sources, an additional online measuring system will be implemented which allows the continuous monitoring of the emanation of radon from the source. This is done on the basis of gamma spectrometric measurements. The aim of the Bachelor thesis is to characterize the response of a scintillator by a combination of Monte Carlo simulation (GEANT 4) and measurements. In addition, the subsurface will be measured in different environments. Subsequently, the generated results will be used to calculate how efficient the given detection procedure with the respective detector is under given conditions (e.g. limited measurement time, different measurement geometries), taking into account ISO 11929. From these data an optimal measuring geometry can be determined considering practicability and practicability. Since the experimental work is to be carried out at the Physikalisch-Technische Bundesanstalt, Braunschweig, it is possible to work as a student trainee for 2 months with remuneration.
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Further information
Laboratory share: 35%
Publiceability: 80%Prerequisites:
6th semester B.Sc., basic lecture and laboratory internship Radiation Protection
Suitable for: B.Sc. Phys.
Start: Anytime
