Dresden 2013 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 75: Anwendungen kernphysikalischer Methoden
HK 75.3: Vortrag
Donnerstag, 7. März 2013, 17:45–18:00, HSZ-204
PGAA experiments close to detection limits — •Petra Kudejova1, Anne Houben2, Ivo Tomandl3, Ladislav Viererbl4, and Zsolt Revay1 — 1Technische Universität München, Forschungsneutronenquelle Heinz Maier-Leibnitz (FRM II), Garching, Germany — 2Max-Planck-Institut fuer Plasmaphysik, Garching, Germany — 3Nuclear Physics Institute, Academy of Science CR, Czech Republic — 4Research Centre Rez Ltd., Nuclear Research Institute Rez plc, Czech Republic
The ultimate detection limits (DL) of the Prompt Gamma Activation Analysis (PGAA) method depend strongly on the amount and matrix of the measured sample as well as on the background signal contribution to the signal coming from the sample itself.
We have performed few experiments close to the detection limits for given elements at the high-flux-PGAA facility at FRM II in Garching. One of the most important elements which can be determined by the PGAA technique is Hydrogen. Hydrogen impurities in Silicon as well as Hydrogen implantation in Beryllium crystals were measured and analysed. Concerning Silicon, which appears frequently in the nature and so in the PGAA samples, we could determine 3 ppm Hydrogen in the crystals. Another experiment testing the limits of the PGAA facility at FRM II was performed in a frame of a Transmutation detectors (TMD) proposal. In this presentation, the experiments and the results will be discussed and possible ways how to improve the detection limits will be proposed.