München 2006 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 21: Postersitzung

HK 21.80: Poster

Dienstag, 21. März 2006, 15:30–17:00, P

Position reconstruction by analysing pulse shapes of highly segmented Ge-detectors — •Torsten Beck, Jürgen Gerl, Nami Saito, and Stanislav Tachenov — GSI Darmstadt, Germany

This work presents a mathematical approach for determining interaction positions of gamma rays in highly segmented Ge-detectors for the AGATA project. Position resolution in the order of a few millimetre is fundamental for the development of gamma- ray tracking. Pulse shapes of a 6x6 segmented AGATA Ge-detector are generated by simulation. The effect of an interacting gamma ray in a segment is significant not only in the irradiated segment, but also in the neighbouring segments. A combined algorithm using the wavelet transformation and a quantisation of the wavelet coefficients is being developed. This algorithm is able to extract the position and energy information of multiple gamma ray interactions by using given pulse forms of the segments. In addition wavelet transformation is used for pre-processing the data in order to reduce the data volume and to eliminate noise contributions.